<eml:eml xmlns:eml="eml://ecoinformatics.org/eml-2.1.0" xmlns:stmml="http://www.xml-cml.org/schema/stmml-1.1" xmlns:ds="eml://ecoinformatics.org/dataset-2.1.0" xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="eml://ecoinformatics.org/eml-2.1.0 http://nis.lternet.edu/schemas/EML/eml-2.1.0/eml.xsd" packageId="knb-lter-mcm.20.14" system="knb">
  <access scope="document" order="allowFirst" authSystem="knb">
    <allow>
      <principal>uid=MCM,o=EDI,dc=edirepository,dc=org</principal>
      <permission>all</permission>
    </allow>
    <allow>
      <principal>public</principal>
      <permission>read</permission>
    </allow>
  </access>
  <dataset>
    <shortName>STREAM_IONS</shortName>
    <title>Ion concentrations in glacial meltwater streams, McMurdo Dry Valleys, Antarctica (1993-2023, ongoing)</title>
    <creator>
      <individualName>
        <givenName>Melisa</givenName>
        <surName>Diaz</surName>
      </individualName>
      <electronicMailAddress>diaz.237@osu.edu</electronicMailAddress>
      <onlineUrl>https://polarenv.weebly.com</onlineUrl>
      <userId directory="https://orcid.org">https://orcid.org/0000-0001-6657-358X</userId>
    </creator>
    <creator>
      <individualName>
        <givenName>Michael</givenName>
        <surName>Gooseff</surName>
      </individualName>
      <electronicMailAddress>michael.gooseff@colorado.edu</electronicMailAddress>
      <onlineUrl>http://goosefflab.weebly.com</onlineUrl>
      <userId directory="https://orcid.org">https://orcid.org/0000-0003-4322-8315</userId>
    </creator>
    <creator>
      <individualName>
        <givenName>W. Berry</givenName>
        <surName>Lyons</surName>
      </individualName>
      <address>
        <deliveryPoint>275 Mendenhall Lab</deliveryPoint>
        <city>Columbus</city>
        <administrativeArea>OH</administrativeArea>
        <postalCode>43210</postalCode>
        <country>US</country>
      </address>
      <phone phonetype="voice">(614) 688-3241</phone>
      <electronicMailAddress>lyons.142@osu.edu</electronicMailAddress>
      <onlineUrl>http://research.bpcrc.osu.edu/EnvironmentalGeochemistry/</onlineUrl>
      <userId directory="https://orcid.org">https://orcid.org/0000-0002-3143-7251</userId>
    </creator>
    <metadataProvider>
      <organizationName>McMurdo Dry Valleys LTER</organizationName>
      <onlineUrl>http://mcmlter.org/</onlineUrl>
    </metadataProvider>
    <associatedParty>
      <individualName>
        <givenName>Kathleen</givenName>
        <surName>Welch</surName>
      </individualName>
      <electronicMailAddress>kathleen.welch@colorado.edu</electronicMailAddress>
      <userId directory="https://orcid.org">https://orcid.org/0000-0003-1028-3086</userId>
      <role>lab technician</role>
    </associatedParty>
    <associatedParty>
      <individualName>
        <givenName>Renée</givenName>
        <surName>Brown</surName>
      </individualName>
      <electronicMailAddress>rfbrown@unm.edu</electronicMailAddress>
      <userId directory="https://orcid.org">https://orcid.org/0000-0002-4986-7663</userId>
      <role>data manager</role>
    </associatedParty>
    <associatedParty>
      <individualName>
        <givenName>Inigo</givenName>
        <surName>San Gil</surName>
      </individualName>
      <address>
        <deliveryPoint>Department of Biology, MSC03 2020 University of New Mexico</deliveryPoint>
        <city>Albuquerque</city>
        <administrativeArea>NM</administrativeArea>
        <postalCode>87131</postalCode>
        <country>US</country>
      </address>
      <phone phonetype="voice">(505) 277-2625</phone>
      <phone phonetype="facsimile">(505) 277-2541</phone>
      <electronicMailAddress>isangil@lternet.edu</electronicMailAddress>
      <role>former data manager</role>
    </associatedParty>
    <associatedParty>
      <individualName>
        <givenName>Chris</givenName>
        <surName>Gardner</surName>
      </individualName>
      <electronicMailAddress>gardner.177@osu.edu</electronicMailAddress>
      <userId directory="https://orcid.org">https://orcid.org/0000-0003-0400-3754</userId>
      <role>former data manager</role>
    </associatedParty>
    <pubDate>2025-02-27</pubDate>
    <language>English</language>
    <abstract>
      <section>
        <para>
          <literalLayout>As part of the Long Term Ecological Research (LTER) project in the McMurdo Dry Valleys of Antarctica, a systematic aqueous geochemical sampling program has been undertaken. A series of terrestrial water samples have been collected and analyzed for major ion chemistry by ion chromatography. The concentrations of ions cover a wide range of total dissolved solids from the stream waters. This dataset shows concentrations of lithium, sodium, potassium, magnesium, calcium, iron, chlorine, bromine, silicon, fluorine, sulfate, and hydrogen ions found in various streams of the McMurdo Dry Valleys.</literalLayout>
        </para>
      </section>
    </abstract>
    <keywordSet>
      <keyword>inorganic nutrients</keyword>
      <keywordThesaurus>LTER Core Areas</keywordThesaurus>
    </keywordSet>
    <intellectualRights>
      <section>
        <title>Data Policies</title>
        <para>
          <literalLayout>This data package is released under the Creative Commons Attribution 4.0 International License (CC BY 4.0; http://creativecommons.org/licenses/by/4.0/), which allows consumers (hereinafter referred to as “Data Users”) to freely reuse, redistribute, transform, or build on this work (even commercially) so long as appropriate credit is provided. Accordingly, Data Users are required to properly cite this data package in any publications or in the metadata of any derived products that result from its use (in whole or in part). A recommended citation is provided on the summary metadata page associated with this data package in the McMurdo Dry Valleys LTER Data Catalog (https://mcmlter.org/data), and a generic citation may be found on the summary metadata page in the repository where this data package was obtained. When these data contribute significantly to the contents of a publication, Data Users must also acknowledge that data were provided by the NSF-supported McMurdo Dry Valleys Long Term Ecological Research program (OPP-2224760). This data package has been released in the spirit of open scientific collaboration. Hence, Data Users are strongly encouraged to consider consultation, collaboration, and/or co-authorship (as appropriate) with the data package creator(s). Data Users should be aware these data may be actively used by others for ongoing research; thus, coordination may be necessary to prevent duplicate publication. Data Users should also recognize that misinterpretation of data may occur if they are used outside the context of the original study. Hence, Data Users are urged to contact the data package creator(s) if they have any questions regarding methodology or results. While substantial efforts are made to ensure the accuracy of this data package (with all its components), complete accuracy cannot be guaranteed. Periodic updates to this data package may occur, and it is the responsibility of Data Users to check for new versions. This data package is made available “as is” and comes with no warranty of accuracy or fitness for use. The creator(s) of this data package and the repository where these data were obtained shall not be liable for any damages resulting from misinterpretation, use, or misuse of these data. Finally, as a professional courtesy, we kindly request Data Users notify the primary contact referenced in the metadata when these data are used in the production of any derivative work or publication. Notification should include an explanation of how the data were used, along with a digital copy of the derived product(s). Thank you.</literalLayout>
        </para>
      </section>
    </intellectualRights>
    <distribution>
      <online>
        <url function="information">https://mcm.lternet.edu/content/ion-concentrations-glacial-meltwater-streams-mcmurdo-dry-valleys-antarctica-1993-2023</url>
      </online>
    </distribution>
    <coverage>
      <geographicCoverage>
        <geographicDescription>Adams Stream at Weir ID: adams_weir kiwi site 3500027; 200 meters downstream of adams glacier</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>163.750000000000</westBoundingCoordinate>
          <eastBoundingCoordinate>163.750000000000</eastBoundingCoordinate>
          <northBoundingCoordinate>-78.131668000000</northBoundingCoordinate>
          <southBoundingCoordinate>-78.131668000000</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>USGS site 4;coordinates taken from 1996-97GPS measurements at center of weirParent Stream: Aiken CreekProvenance : GPS96-97.DOCID: aiken_f5</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>163.271942100000</westBoundingCoordinate>
          <eastBoundingCoordinate>163.271942100000</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.602516000000</northBoundingCoordinate>
          <southBoundingCoordinate>-77.602516000000</southBoundingCoordinate>
          <boundingAltitudes>
            <altitudeMinimum>20</altitudeMinimum>
            <altitudeMaximum>20</altitudeMaximum>
            <altitudeUnits>meter</altitudeUnits>
          </boundingAltitudes>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>USGS site 9; coordinates taken from 1996-97 GPS measurements at center of weir Parent Stream: Andersen Creek Provenance : GPS96-97.DOC ID: andrsn_h1</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>162.906356800000</westBoundingCoordinate>
          <eastBoundingCoordinate>162.906356800000</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.622772000000</northBoundingCoordinate>
          <southBoundingCoordinate>-77.622772000000</southBoundingCoordinate>
          <boundingAltitudes>
            <altitudeMinimum>78</altitudeMinimum>
            <altitudeMaximum>78</altitudeMaximum>
            <altitudeUnits>meter</altitudeUnits>
          </boundingAltitudes>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Andrews Creek at mouth ID: andrws_mouth</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>163.044448852539</westBoundingCoordinate>
          <eastBoundingCoordinate>163.044448852539</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.620834350586</northBoundingCoordinate>
          <southBoundingCoordinate>-77.620834350586</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Bartlette Creek at mouth ID: bartlt_mouth</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>162.416671752930</westBoundingCoordinate>
          <eastBoundingCoordinate>162.416671752930</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.720832824707</northBoundingCoordinate>
          <southBoundingCoordinate>-77.720832824707</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Coordinates based on averaging the starting and ending points of the 'Bohner stream at lower site' transect (measurements are occasionally made in middle of the established transect) Parent Stream: Bohner Stream Provenance : StreamsIC-97-98_ques.txt ID: bohnr_lower</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>162.561920200000</westBoundingCoordinate>
          <eastBoundingCoordinate>162.561920200000</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.697334000000</northBoundingCoordinate>
          <southBoundingCoordinate>-77.697334000000</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Bohner Stream at mouthId: bohnr_mouth</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>162.544788000000</westBoundingCoordinate>
          <eastBoundingCoordinate>162.544788000000</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.695564000000</northBoundingCoordinate>
          <southBoundingCoordinate>-77.695564000000</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Bowles Creek at mouth ID: bowles_mouth</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>163.050003051758</westBoundingCoordinate>
          <eastBoundingCoordinate>163.050003051758</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.622222900391</northBoundingCoordinate>
          <southBoundingCoordinate>-77.622222900391</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>USGS site 1; coordinates taken from 1996-97 GPS measurements at center of weir Parent Stream: Canada Stream Provenance : GPS96-97.DOC ID: canada_f1</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>163.054733300000</westBoundingCoordinate>
          <eastBoundingCoordinate>163.054733300000</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.613655000000</northBoundingCoordinate>
          <southBoundingCoordinate>-77.613655000000</southBoundingCoordinate>
          <boundingAltitudes>
            <altitudeMinimum>50</altitudeMinimum>
            <altitudeMaximum>50</altitudeMaximum>
            <altitudeUnits>meter</altitudeUnits>
          </boundingAltitudes>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Commonwealth Stream at C1 ID: common_c1 USGS site 13</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>163.380828900000</westBoundingCoordinate>
          <eastBoundingCoordinate>163.380828900000</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.563332000000</northBoundingCoordinate>
          <southBoundingCoordinate>-77.563332000000</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>USGS site 6; coordinates taken from 1996-97 GPS measurements at center of weir Parent Stream: Crescent Stream Provenance : GPS96-97.DOC ID: crescent_f8</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>163.184463500000</westBoundingCoordinate>
          <eastBoundingCoordinate>163.184463500000</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.619064000000</northBoundingCoordinate>
          <southBoundingCoordinate>-77.619064000000</southBoundingCoordinate>
          <boundingAltitudes>
            <altitudeMinimum>23</altitudeMinimum>
            <altitudeMaximum>23</altitudeMaximum>
            <altitudeUnits>meter</altitudeUnits>
          </boundingAltitudes>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>USGS site 7; coordinates taken from 1996-97 GPS measurements at center of weir Parent Stream: Delta Stream Provenance : GPS96-97.DOC ID: delta_f10</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>163.108444200000</westBoundingCoordinate>
          <eastBoundingCoordinate>163.108444200000</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.624619000000</northBoundingCoordinate>
          <southBoundingCoordinate>-77.624619000000</southBoundingCoordinate>
          <boundingAltitudes>
            <altitudeMinimum>23</altitudeMinimum>
            <altitudeMaximum>23</altitudeMaximum>
            <altitudeUnits>meter</altitudeUnits>
          </boundingAltitudes>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Garwood River below confluence ID: garwood_blwconf Garwood River at sample site 2</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>164.066665649414</westBoundingCoordinate>
          <eastBoundingCoordinate>164.066665649414</eastBoundingCoordinate>
          <northBoundingCoordinate>-78.019447326660</northBoundingCoordinate>
          <southBoundingCoordinate>-78.019447326660</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Garwood Stream at Lake Colleen ID: garwood_colleen kiwi site 3500020; 500 meters downstream of Lake Colleen</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>163.913894653320</westBoundingCoordinate>
          <eastBoundingCoordinate>163.913894653320</eastBoundingCoordinate>
          <northBoundingCoordinate>-78.027778625488</northBoundingCoordinate>
          <southBoundingCoordinate>-78.027778625488</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Garwood River at sample site 1; flatsID: flatsgarwood_flats</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>164.016662597656</westBoundingCoordinate>
          <eastBoundingCoordinate>164.016662597656</eastBoundingCoordinate>
          <northBoundingCoordinate>-78.020835876465</northBoundingCoordinate>
          <southBoundingCoordinate>-78.020835876465</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Green Creek at F9Description: USGS site 8; coordinates taken from 1996-97 GPS measurements at center of weirID: green_f9&#160;Provenance&#160;File Name :GPS96-97.DOC</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>163.059753417969</westBoundingCoordinate>
          <eastBoundingCoordinate>163.059753417969</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.624099731445</northBoundingCoordinate>
          <southBoundingCoordinate>-77.624099731445</southBoundingCoordinate>
          <boundingAltitudes>
            <altitudeMinimum>25</altitudeMinimum>
            <altitudeMaximum>25</altitudeMaximum>
            <altitudeUnits>meter</altitudeUnits>
          </boundingAltitudes>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Harnish Creek Tributary at F11Description: USGS site 20; coordinates taken from 1996-97 GPS measurements at center of weirID: harnish_f11File Name :GPS96-97.DOC</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>163.269515991211</westBoundingCoordinate>
          <eastBoundingCoordinate>163.269515991211</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.621246337891</northBoundingCoordinate>
          <southBoundingCoordinate>-77.621246337891</southBoundingCoordinate>
          <boundingAltitudes>
            <altitudeMinimum>79</altitudeMinimum>
            <altitudeMaximum>79</altitudeMaximum>
            <altitudeUnits>meter</altitudeUnits>
          </boundingAltitudes>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Harnish Creek at F7ID: harnish_f7USGS site 17</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>163.232772827148</westBoundingCoordinate>
          <eastBoundingCoordinate>163.232772827148</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.608329772949</northBoundingCoordinate>
          <southBoundingCoordinate>-77.608329772949</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>House Stream at H2Description: USGS site 10; coordinates taken from 1996-97 GPS measurements at center of weirID: house_h2Provenance File Name :GPS96-97.DOC</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>162.741317749023</westBoundingCoordinate>
          <eastBoundingCoordinate>162.741317749023</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.642982482910</northBoundingCoordinate>
          <southBoundingCoordinate>-77.642982482910</southBoundingCoordinate>
          <boundingAltitudes>
            <altitudeMinimum>81</altitudeMinimum>
            <altitudeMaximum>81</altitudeMaximum>
            <altitudeUnits>meter</altitudeUnits>
          </boundingAltitudes>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>USGS site 16 Parent Stream: Lawson Creek id: lawson_b3</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>162.269910000000</westBoundingCoordinate>
          <eastBoundingCoordinate>162.269910000000</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.721248000000</northBoundingCoordinate>
          <southBoundingCoordinate>-77.721248000000</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Lizotte Creek at mouth ID: lizotte_mouth</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>162.483337402344</westBoundingCoordinate>
          <eastBoundingCoordinate>162.483337402344</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.704170227051</northBoundingCoordinate>
          <southBoundingCoordinate>-77.704170227051</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>USGS site 3; coordinates taken from 1996-97 GPS measurements at center of weir Parent Stream: Lost Seal Stream Provenance : GPS96-97.DOC ID: lostseal_f3</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>163.244400000000</westBoundingCoordinate>
          <eastBoundingCoordinate>163.244400000000</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.595268000000</northBoundingCoordinate>
          <southBoundingCoordinate>-77.595268000000</southBoundingCoordinate>
          <boundingAltitudes>
            <altitudeMinimum>25</altitudeMinimum>
            <altitudeMaximum>25</altitudeMaximum>
            <altitudeUnits>meter</altitudeUnits>
          </boundingAltitudes>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Lyons Creek at B4 ID: lyons_b4 USGS site 19</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>162.274993900000</westBoundingCoordinate>
          <eastBoundingCoordinate>162.274993900000</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.727776000000</northBoundingCoordinate>
          <southBoundingCoordinate>-77.727776000000</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Provenance: e-mail from Mike Gooseff Re: DOC results 7/18/2000 Parent Stream: Lyons Creek Tributary ID: lyons_trib</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>162.270004300000</westBoundingCoordinate>
          <eastBoundingCoordinate>162.270004300000</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.720001000000</northBoundingCoordinate>
          <southBoundingCoordinate>-77.720001000000</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Mariah Creek at mouth ID: mariah_mouth</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>163.047226000000</westBoundingCoordinate>
          <eastBoundingCoordinate>163.047226000000</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.623611000000</northBoundingCoordinate>
          <southBoundingCoordinate>-77.623611000000</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Mason Creek at Mouth ID: mason_mouth</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>162.274993900000</westBoundingCoordinate>
          <eastBoundingCoordinate>162.274993900000</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.729164000000</northBoundingCoordinate>
          <southBoundingCoordinate>-77.729164000000</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>McKay Creek at mouth. Id: mckay_mouth</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>162.747222900000</westBoundingCoordinate>
          <eastBoundingCoordinate>162.747222900000</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.644722000000</northBoundingCoordinate>
          <southBoundingCoordinate>-77.644722000000</southBoundingCoordinate>
          <boundingAltitudes>
            <altitudeMinimum>0</altitudeMinimum>
            <altitudeMaximum>0</altitudeMaximum>
            <altitudeUnits>meter</altitudeUnits>
          </boundingAltitudes>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>McKnight Creek at mouth ID: mcknight_mouth</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>163.264724700000</westBoundingCoordinate>
          <eastBoundingCoordinate>163.264724700000</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.599724000000</northBoundingCoordinate>
          <southBoundingCoordinate>-77.599724000000</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>USGS site 15; kiwi site 3500002; coordinates taken from 1996-97 GPS measurements at center of weir Parent Stream: Onyx River Provenance : GPS96-97.DOC ID: onyx_lwright</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>162.653533900000</westBoundingCoordinate>
          <eastBoundingCoordinate>162.653533900000</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.444534000000</northBoundingCoordinate>
          <southBoundingCoordinate>-77.444534000000</southBoundingCoordinate>
          <boundingAltitudes>
            <altitudeMinimum>273</altitudeMinimum>
            <altitudeMaximum>273</altitudeMaximum>
            <altitudeUnits>meter</altitudeUnits>
          </boundingAltitudes>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>USGS site 14; kiwi site 3500001; coordinates taken from 1996-97 GPS measurements at center of weir Parent Stream: Onyx River Provenance : GPS96-97.DOC ID: onyx_vnda</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>161.696624800000</westBoundingCoordinate>
          <eastBoundingCoordinate>161.696624800000</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.523430000000</northBoundingCoordinate>
          <southBoundingCoordinate>-77.523430000000</southBoundingCoordinate>
          <boundingAltitudes>
            <altitudeMinimum>101</altitudeMinimum>
            <altitudeMaximum>101</altitudeMaximum>
            <altitudeUnits>meter</altitudeUnits>
          </boundingAltitudes>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Priscu Stream at B1 Id: priscu_b1 USGS Site 11</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>162.534729000000</westBoundingCoordinate>
          <eastBoundingCoordinate>162.534729000000</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.699997000000</northBoundingCoordinate>
          <southBoundingCoordinate>-77.699997000000</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Red River art Blood Falls ID: red_bfalls</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>162.268051147461</westBoundingCoordinate>
          <eastBoundingCoordinate>162.268051147461</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.723335266113</northBoundingCoordinate>
          <southBoundingCoordinate>-77.723335266113</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Santa Fe Stream at B2 ID: santafe_b2 USGS site 12; formerly N Taylor &amp; Hendy Stream</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>162.266662597656</westBoundingCoordinate>
          <eastBoundingCoordinate>162.266662597656</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.723052978516</northBoundingCoordinate>
          <southBoundingCoordinate>-77.723052978516</southBoundingCoordinate>
          <boundingAltitudes>
            <altitudeMinimum>0</altitudeMinimum>
            <altitudeMaximum>0</altitudeMaximum>
            <altitudeUnits>meter</altitudeUnits>
          </boundingAltitudes>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Sharp Creek at mouth. Id: sharp_mouth</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>162.247222900391</westBoundingCoordinate>
          <eastBoundingCoordinate>162.247222900391</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.722221374512</northBoundingCoordinate>
          <southBoundingCoordinate>-77.722221374512</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>USGS site 5; coordinates taken from 1996-97 GPS measurements at center of weir Parent Stream: Von Guerard Stream Provenance : GPS96-97.DOC ID: vguerard_f6</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>163.253997802734</westBoundingCoordinate>
          <eastBoundingCoordinate>163.253997802734</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.608200073242</northBoundingCoordinate>
          <southBoundingCoordinate>-77.608200073242</southBoundingCoordinate>
          <boundingAltitudes>
            <altitudeMinimum>19</altitudeMinimum>
            <altitudeMaximum>19</altitudeMaximum>
            <altitudeUnits>meter</altitudeUnits>
          </boundingAltitudes>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>ID:vguerard_lower Coordinates based on averaging the starting and ending points of the 'Von Guerard stream at lower site' transect (measurements are occasionally made in middle of the established transect)</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>163.287963867188</westBoundingCoordinate>
          <eastBoundingCoordinate>163.287963867188</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.619476318359</northBoundingCoordinate>
          <southBoundingCoordinate>-77.619476318359</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Von Guerard stream at upper site ID: vguerard_upper Coordinates based on averaging the starting and ending points of the 'Von Guerard stream at upper site' transect (measurements are occasionally made in middle of the established transect)</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>163.306304931641</westBoundingCoordinate>
          <eastBoundingCoordinate>163.306304931641</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.634384155273</northBoundingCoordinate>
          <southBoundingCoordinate>-77.634384155273</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Vincent Creek at mouth (vincent_mouth)</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>162.425003051758</westBoundingCoordinate>
          <eastBoundingCoordinate>162.425003051758</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.720275878906</northBoundingCoordinate>
          <southBoundingCoordinate>-77.720275878906</southBoundingCoordinate>
        </boundingCoordinates>
      </geographicCoverage>
      <geographicCoverage>
        <geographicDescription>Wharton Creek at mouth. ID: wharton_mouth</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>162.747222900391</westBoundingCoordinate>
          <eastBoundingCoordinate>162.747222900391</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.645835876465</northBoundingCoordinate>
          <southBoundingCoordinate>-77.645835876465</southBoundingCoordinate>
          <boundingAltitudes>
            <altitudeMinimum>0</altitudeMinimum>
            <altitudeMaximum>0</altitudeMaximum>
            <altitudeUnits>meter</altitudeUnits>
          </boundingAltitudes>
        </boundingCoordinates>
      </geographicCoverage>
      <temporalCoverage>
        <rangeOfDates>
          <beginDate>
            <calendarDate>1993-12-02</calendarDate>
          </beginDate>
          <endDate>
            <calendarDate>2023-12-23</calendarDate>
          </endDate>
        </rangeOfDates>
      </temporalCoverage>
    </coverage>
    <maintenance>
      <description>
        <para>
          <literalLayout>Metadata improved in 2016, San Gil. The original iterations of the 'strmchem' file (stream chemistry data) were created by Kathy Welch, and submitted to Denise Steigerwald (the data manager) at the Institute of Arctic and Alpine Research (INSTAAR). These files are currently located on the PC in the data manager's office at INSTAAR. Following discussions between Kathy Welch and Denise Steigerwald, it was decided to remove some fields (eg., dilution factor), and add others (eg. strmgageid, collection date, comments for each type of measurement) to these files in order to make them more consistent and relational for future references. Following these revisions, they were imported into Microsoft Access and saved in a table named "Stream Chemistry / Ion Concentrations". This table was exported as an ascii, text, comma delimited file (strmchem.dat) and as an MS-DOS text, table layout file (strmchem.txt), to present on the MCM LTER web site. Both of these files are linked to this web page above.</literalLayout>
        </para>
      </description>
    </maintenance>
    <contact>
      <individualName>
        <givenName>McMurdo Dry Valleys LTER</givenName>
        <surName>Information Manager</surName>
      </individualName>
      <electronicMailAddress>im@mcmlter.org</electronicMailAddress>
    </contact>
    <publisher>
      <organizationName>McMurdo Dry Valleys LTER</organizationName>
      <onlineUrl>http://mcmlter.org/</onlineUrl>
    </publisher>
    <pubPlace>McMurdo Dry Valleys LTER</pubPlace>
    <methods>
      <methodStep>
        <description>
          <section>
            <para>
              <literalLayout>A Dionex DX-300 ion chromatographic system was used for the major ion analyses. Please see the following citation for complete methods: Welch, K.A., Lyons, W.B., Graham, E., Neumann, K., Thomas, J.M., and D. Mikesell. 1996. Determination of major element chemistry in terrestrial waters from Antarctica by ion chromatography. Journal of Chromatography A 739: 257-263.</literalLayout>
            </para>
          </section>
        </description>
        <instrumentation>Dionex DX-300 ion chromatographic system</instrumentation>
      </methodStep>
    </methods>
    <dataTable>
      <entityName>STREAM_IONS</entityName>
      <entityDescription>Ions</entityDescription>
      <physical>
        <objectName>mcmlter-strm-ions-20250226.csv</objectName>
        <size>945738</size>
        <dataFormat>
          <textFormat>
            <numHeaderLines>1</numHeaderLines>
            <numFooterLines>1</numFooterLines>
            <recordDelimiter>\n</recordDelimiter>
            <attributeOrientation>column</attributeOrientation>
            <simpleDelimited>
              <fieldDelimiter>,</fieldDelimiter>
            </simpleDelimited>
          </textFormat>
        </dataFormat>
        <distribution>
          <online>
            <url>https://mcm.lternet.edu/sites/default/files/data/mcmlter-strm-ions-20250226.csv</url>
          </online>
        </distribution>
      </physical>
      <attributeList>
        <attribute>
          <attributeName>DATASET_CODE</attributeName>
          <attributeLabel>Dataset code</attributeLabel>
          <attributeDefinition>Code representing stream chemistry / ion concentrations dataset</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>Code representing stream chemistry / ion concentrations dataset</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>strmgageid</attributeName>
          <attributeLabel>strmgageid</attributeLabel>
          <attributeDefinition>Code representing stream gauge station</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>Code representing stream gauge station</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>Location</attributeName>
          <attributeLabel>Location</attributeLabel>
          <attributeDefinition>Name of stream gauge station</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>Name of stream gauge station</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>Sample Name</attributeName>
          <attributeLabel>Sample Name</attributeLabel>
          <attributeDefinition>Original name for sample when gathered in field, submitted to INSTAAR</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>Original name for sample when gathered in field, submitted to INSTAAR</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>DATE_TIME</attributeName>
          <attributeLabel>DATE_TIME</attributeLabel>
          <attributeDefinition>Date/time of sample (McMurdo time)</attributeDefinition>
          <storageType>date</storageType>
          <measurementScale>
            <dateTime>
              <formatString>MM/DD/YYYY HH24:MI</formatString>
            </dateTime>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>Li (mg/L)</attributeName>
          <attributeLabel>Li (mg/L)</attributeLabel>
          <attributeDefinition>lithium concentration</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <standardUnit>milligramsPerLiter</standardUnit>
              </unit>
              <precision>0.0001</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">50</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>Li (mM)</attributeName>
          <attributeLabel>Li (mM)</attributeLabel>
          <attributeDefinition>lithium concentration</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <customUnit>millimoles/liter</customUnit>
              </unit>
              <precision>0.0001</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">5</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>Li comments</attributeName>
          <attributeLabel>Li comments</attributeLabel>
          <attributeDefinition>Comments pertaining to lithium measurement</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>Comments pertaining to lithium measurement</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>Na (mg/L)</attributeName>
          <attributeLabel>Na (mg/L)</attributeLabel>
          <attributeDefinition>sodium concentration</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <standardUnit>milligramsPerLiter</standardUnit>
              </unit>
              <precision>1</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">100000</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>Na (mM)</attributeName>
          <attributeLabel>Na (mM)</attributeLabel>
          <attributeDefinition>sodium concentration</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <customUnit>millimoles/liter</customUnit>
              </unit>
              <precision>0.01</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">5000</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>Na comments</attributeName>
          <attributeLabel>Na comments</attributeLabel>
          <attributeDefinition>Comments pertaining to sodium measurement</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>Comments pertaining to sodium measurement</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>K (mg/L)</attributeName>
          <attributeLabel>K (mg/L)</attributeLabel>
          <attributeDefinition>potassium concentration</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <standardUnit>milligramsPerLiter</standardUnit>
              </unit>
              <precision>0.0001</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">50</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>K (mM)</attributeName>
          <attributeLabel>K (mM)</attributeLabel>
          <attributeDefinition>potassium concentration</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <customUnit>millimoles/liter</customUnit>
              </unit>
              <precision>0.0001</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">5</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>K comments</attributeName>
          <attributeLabel>K comments</attributeLabel>
          <attributeDefinition>Comments pertaining to potassium measurement</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>Comments pertaining to potassium measurement</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>Mg (mg/L)</attributeName>
          <attributeLabel>Mg (mg/L)</attributeLabel>
          <attributeDefinition>magnesium concentration</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <standardUnit>milligramsPerLiter</standardUnit>
              </unit>
              <precision>0.0001</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">50</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>Mg (mM)</attributeName>
          <attributeLabel>Mg (mM)</attributeLabel>
          <attributeDefinition>magnesium concentration</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <customUnit>millimoles/liter</customUnit>
              </unit>
              <precision>0.0001</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">5</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>Mg comments</attributeName>
          <attributeLabel>Mg comments</attributeLabel>
          <attributeDefinition>Comments pertaining to magnesium measurement</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>Comments pertaining to magnesium measurement</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>Ca (mg/L)</attributeName>
          <attributeLabel>Ca (mg/L)</attributeLabel>
          <attributeDefinition>calcium concentration</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <standardUnit>milligramsPerLiter</standardUnit>
              </unit>
              <precision>0.0001</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">50</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>Ca (mM)</attributeName>
          <attributeLabel>Ca (mM)</attributeLabel>
          <attributeDefinition>calcium concentration</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <customUnit>millimoles/liter</customUnit>
              </unit>
              <precision>0.0001</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">5</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>Ca comments</attributeName>
          <attributeLabel>Ca comments</attributeLabel>
          <attributeDefinition>Comments pertaining to calcium measurement</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>Comments pertaining to calcium measurement</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>F (mg/L)</attributeName>
          <attributeLabel>F (mg/L)</attributeLabel>
          <attributeDefinition>fluorine concentration</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <standardUnit>milligramsPerLiter</standardUnit>
              </unit>
              <precision>0.0001</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">50</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>F (mM)</attributeName>
          <attributeLabel>F (mM)</attributeLabel>
          <attributeDefinition>fluorine concentration</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <customUnit>millimoles/liter</customUnit>
              </unit>
              <precision>0.0001</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">5</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>F comments</attributeName>
          <attributeLabel>F comments</attributeLabel>
          <attributeDefinition>Comments pertaining to fluorine measurement</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>Comments pertaining to fluorine measurement</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>Cl (mg/L)</attributeName>
          <attributeLabel>Cl (mg/L)</attributeLabel>
          <attributeDefinition>chlorine concentration</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <standardUnit>milligramsPerLiter</standardUnit>
              </unit>
              <precision>0.0001</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">50</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>Cl (mM)</attributeName>
          <attributeLabel>Cl (mM)</attributeLabel>
          <attributeDefinition>chlorine concentration</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <customUnit>millimoles/liter</customUnit>
              </unit>
              <precision>0.0001</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">5</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>Cl comments</attributeName>
          <attributeLabel>Cl comments</attributeLabel>
          <attributeDefinition>Comments pertaining to chlorine measurement</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>Comments pertaining to chlorine measurement</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>Br (mg/L)</attributeName>
          <attributeLabel>Br (mg/L)</attributeLabel>
          <attributeDefinition>bromine concentration</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <standardUnit>milligramsPerLiter</standardUnit>
              </unit>
              <precision>0.0001</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">50</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>Br (mM)</attributeName>
          <attributeLabel>Br (mM)</attributeLabel>
          <attributeDefinition>bromine concentration</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <customUnit>millimoles/liter</customUnit>
              </unit>
              <precision>0.0001</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">5</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>Br comments</attributeName>
          <attributeLabel>Br comments</attributeLabel>
          <attributeDefinition>Comments pertaining to bromine measurement</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>Comments pertaining to bromine measurement</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>SO4 (mg/L)</attributeName>
          <attributeLabel>SO4 (mg/L)</attributeLabel>
          <attributeDefinition>sulfate concentration</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <standardUnit>milligramsPerLiter</standardUnit>
              </unit>
              <precision>0.0001</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">50</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>SO4 (mM)</attributeName>
          <attributeLabel>SO4 (mM)</attributeLabel>
          <attributeDefinition>sulfate concentration</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <customUnit>millimoles/liter</customUnit>
              </unit>
              <precision>0.0001</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">5</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>SO4 comments</attributeName>
          <attributeLabel>SO4 comments</attributeLabel>
          <attributeDefinition>Comments pertaining to sulfate measurement</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>Comments pertaining to sulfate measurement</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>Alkalinity (meq/L)</attributeName>
          <attributeLabel>Alkalinity (meq/L)</attributeLabel>
          <attributeDefinition>alkalinity measured by titration in lab</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <customUnit>milliEquivalents</customUnit>
              </unit>
              <precision>0.0001</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">50</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>alk comments</attributeName>
          <attributeLabel>alk comments</attributeLabel>
          <attributeDefinition>Comments pertaining to alkalinity measurement</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>Comments pertaining to alkalinity measurement</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>Si (mg/L)</attributeName>
          <attributeLabel>Si (mg/L)</attributeLabel>
          <attributeDefinition>silicon concentration</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <standardUnit>milligramsPerLiter</standardUnit>
              </unit>
              <precision>0.0001</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">50</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>Si (mM)</attributeName>
          <attributeLabel>Si (mM)</attributeLabel>
          <attributeDefinition>silicon concentration</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <customUnit>millimoles/liter</customUnit>
              </unit>
              <precision>0.0001</precision>
              <numericDomain>
                <numberType>real</numberType>
                <bounds>
                  <minimum exclusive="false">0</minimum>
                  <maximum exclusive="false">5</maximum>
                </bounds>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Null</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>Si comments</attributeName>
          <attributeLabel>Si comments</attributeLabel>
          <attributeDefinition>Comments pertaining to silicon measurement</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>Comments pertaining to silicon measurement</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>Remarks</attributeName>
          <attributeLabel>Remarks</attributeLabel>
          <attributeDefinition>Sample Comments</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>Sample Comments</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
      </attributeList>
    </dataTable>
  </dataset>
  <additionalMetadata>
    <metadata>
      <stmml:unitList xmlns:stmml="http://www.xml-cml.org/schema/stmml-1.1" xmlns="http://www.xml-cml.org/schema/stmml" xmlns:sch="http://www.ascc.net/xml/schematron" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://www.xml-cml.org/schema/stmml-1.1 http://nis.lternet.edu/schemas/EML/eml-2.1.0/stmml.xsd">
        <stmml:unit id="millimoles/liter" name="millimoles/liter" abbreviation="" unitType="">
          <stmml:description />
        </stmml:unit>
        <stmml:unit id="milliEquivalents" name="milliEquivalents" abbreviation="" unitType="">
          <stmml:description />
        </stmml:unit>
      </stmml:unitList>
    </metadata>
  </additionalMetadata>
</eml:eml>