<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.75.558" system="knb">
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  <dataset>
    <shortName>ADCP-ID.75</shortName>
    <title>2012-2013 Sub-ice Current Velocities Recorded with an Acoustic Doppler Current Profiler</title>
    <creator>
      <individualName>
        <givenName>Devin</givenName>
        <surName>Castendyk</surName>
      </individualName>
      <electronicMailAddress>castendn@gmail.com</electronicMailAddress>
      <userId directory="https://orcid.org">https://orcid.org/0000-0002-8150-5566</userId>
    </creator>
    <metadataProvider>
      <organizationName>McMurdo Dry Valleys LTER</organizationName>
      <onlineUrl>http://mcmlter.org/</onlineUrl>
    </metadataProvider>
    <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>data manager</role>
    </associatedParty>
    <pubDate>2013-01-01</pubDate>
    <language>English</language>
    <abstract>
      <section>
        <para>
          <literalLayout>Between 26 November 2012 and 22 January 2013, a SonTek Argonaut-XR 1.5 MHz Acoustic Doppler Current Profiler (ADCP) was fixed at the bottom of the Limno Sampling Hole in Lake Hoare, looking downward through the water column. Every 30 seconds, the ADCP measured horizontal and vertical current velocities in six, 50-cm-thick cells between 0.5 and 3.5 m below the lake ice. The observation interval became deeper over time as the ADCP platform melted into the lake ice and the lake ice thinned. Data collected from 26 to 30 November represent pre-discharge data when wind and solar radiation were the only forces acting on the lake. Data from 30 November to 8 December transition from pre-discharge to spring freshet conditions on 6 December. Spring freshet was the most dynamic period observed with highest velocities recorded. Data from 8 to 13 December transitioned from the end of spring freshet on 10 December to summer diurnal discharge conditions. Data from the remaining datasets, 13 to 22 December, 22 to 29 December, 29 December to 6 January, 6 to 13 January, and 13 to 22 January, reflect conditions during summer diurnal stream discharge, especially data from 29 December to 6 January. From these observations, solar radiation, wind, glacial runoff during spring</literalLayout>
        </para>
      </section>
    </abstract>
    <additionalInfo>
      <para>
        <literalLayout></literalLayout>
      </para>
    </additionalInfo>
    <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/2012-2013-sub-ice-current-velocities-recorded-acoustic-doppler-current-profiler</url>
      </online>
    </distribution>
    <coverage>
      <geographicCoverage>
        <geographicDescription>Lake Hoare occupies a narrower portion of the Taylor Valley, dammed by the Canada Glacier. It would drain almost completely without this dam. There are a number of islands which may be related to an old terminal of Canada Glacier. The lake is fed primarily from direct runoff from the glacier, as well as meltwater streams. (Lake level rose ~1.5 m between 1972 and 1996). There are no surface outflows; the only known water loss is through ice ablation (evaporation, sublimation and physical scouring). Valley: Taylor Distance to Sea : 15 Maximum Length (km): 4.2 Maximum Width (km): 1 Maximum Depth (m): 34 Surface Area (km^2): 1.94 Ice Thickness Average Surface (m): 3.1 - 5.5 Volume (m^3 * 10^6): 17.5</geographicDescription>
        <boundingCoordinates>
          <westBoundingCoordinate>162.784423828125</westBoundingCoordinate>
          <eastBoundingCoordinate>162.935836791992</eastBoundingCoordinate>
          <northBoundingCoordinate>-77.623085021973</northBoundingCoordinate>
          <southBoundingCoordinate>-77.639259338379</southBoundingCoordinate>
          <boundingAltitudes>
            <altitudeMinimum>73</altitudeMinimum>
            <altitudeMaximum>73</altitudeMaximum>
            <altitudeUnits>meter</altitudeUnits>
          </boundingAltitudes>
        </boundingCoordinates>
      </geographicCoverage>
      <temporalCoverage>
        <rangeOfDates>
          <beginDate>
            <calendarDate>2012-01-01</calendarDate>
          </beginDate>
          <endDate>
            <calendarDate>2013-12-31</calendarDate>
          </endDate>
        </rangeOfDates>
      </temporalCoverage>
    </coverage>
    <purpose>
      <para>
        <literalLayout>o collect a long duration dataset of sub-ice currents spanning pre-discharge, spring freshet, and diurnal discharge events in order to identify the causes of sub-ice currents and seiche activity observed in 2009-2010.</literalLayout>
      </para>
    </purpose>
    <contact>
      <organizationName>McMurdo Dry Valleys LTER</organizationName>
      <onlineUrl>http://mcmlter.org/</onlineUrl>
    </contact>
    <publisher>
      <organizationName>McMurdo Dry Valleys LTER</organizationName>
      <onlineUrl>http://mcmlter.org/</onlineUrl>
    </publisher>
    <pubPlace>McMurdo Dry Valleys LTER</pubPlace>
    <dataTable>
      <entityName>LIMNO_ANCILLARY_ADCP2</entityName>
      <physical>
        <objectName>LIMNO_ANCILLARY_ADCP2.csv</objectName>
        <size>76606357</size>
        <dataFormat>
          <textFormat>
            <numHeaderLines>28</numHeaderLines>
            <numFooterLines>1</numFooterLines>
            <recordDelimiter>\n</recordDelimiter>
            <attributeOrientation>column</attributeOrientation>
            <simpleDelimited>
              <fieldDelimiter>,</fieldDelimiter>
              <quoteCharacter>"</quoteCharacter>
            </simpleDelimited>
          </textFormat>
        </dataFormat>
        <distribution>
          <online>
            <url>https://mcm.lternet.edu/sites/default/files/LIMNO_ANCILLARY_ADCP2.csv</url>
          </online>
        </distribution>
      </physical>
      <attributeList>
        <attribute>
          <attributeName>DATASET_CODE</attributeName>
          <attributeLabel>DATASET_CODE</attributeLabel>
          <attributeDefinition>A code used to identify the entity table name and create lists of data holdings</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>A code used to identify the entity table name and create lists of data holdings</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>LOCATION NAME</attributeName>
          <attributeLabel>LOCATION NAME</attributeLabel>
          <attributeDefinition>Name of lake where measurement was made</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>Name of lake where measurement was made</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>LOCATION CODE</attributeName>
          <attributeLabel>LOCATION CODE</attributeLabel>
          <attributeDefinition>Location in the lake where measurement was made</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>Location in the lake where measurement was made</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>DATE_TIME</attributeName>
          <attributeLabel>Attribute Label</attributeLabel>
          <attributeDefinition>Date on which sample was gathered</attributeDefinition>
          <storageType>date</storageType>
          <measurementScale>
            <dateTime>
              <formatString>mm/dd/yy H:M:S</formatString>
            </dateTime>
          </measurementScale>
          <missingValueCode>
            <code>Required entry</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>SAMPLE_ID</attributeName>
          <attributeLabel>SAMPLE_ID</attributeLabel>
          <attributeDefinition>An internal identifier for the record</attributeDefinition>
          <storageType>string</storageType>
          <measurementScale>
            <nominal>
              <nonNumericDomain>
                <textDomain>
                  <definition>An internal identifier for the record</definition>
                </textDomain>
              </nonNumericDomain>
            </nominal>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>MIN_DEPTH (m)</attributeName>
          <attributeLabel>MIN_DEPTH (m)</attributeLabel>
          <attributeDefinition>Minimum Depth value for the measurement range</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <standardUnit>meter</standardUnit>
              </unit>
              <numericDomain>
                <numberType>real</numberType>
              </numericDomain>
            </ratio>
          </measurementScale>
        </attribute>
        <attribute>
          <attributeName>MAX_DEPTH (m)</attributeName>
          <attributeLabel>MAX_DEPTH (m)</attributeLabel>
          <attributeDefinition>Maximum Depth value for the measurement range</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <standardUnit>meter</standardUnit>
              </unit>
              <numericDomain>
                <numberType>real</numberType>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Required entry</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>Vx (cm/s)</attributeName>
          <attributeLabel>Vx (cm/s)</attributeLabel>
          <attributeDefinition>the velocity component for the X-axis - East-West, where positive values mean fluid moving towards the west</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <standardUnit>centimetersPerSecond</standardUnit>
              </unit>
              <precision>0.5</precision>
              <numericDomain>
                <numberType>real</numberType>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Required entry</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>Vy (cm/s)</attributeName>
          <attributeLabel>Vy (cm/s)</attributeLabel>
          <attributeDefinition>the velocity component for the Y-axis - North-South, where positive values mean fluid moving towards the north</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <standardUnit>centimetersPerSecond</standardUnit>
              </unit>
              <precision>0.5</precision>
              <numericDomain>
                <numberType>real</numberType>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Required entry</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>Vz (cm/s)</attributeName>
          <attributeLabel>Vz (cm/s)</attributeLabel>
          <attributeDefinition>the velocity component for the Z-axis - Bottom-Up, where positive values mean fluid moving towards the bottom (down)</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <standardUnit>centimetersPerSecond</standardUnit>
              </unit>
              <precision>0.5</precision>
              <numericDomain>
                <numberType>real</numberType>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Required entry</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>SPD_XY</attributeName>
          <attributeLabel>Speed_xy (cm/s)</attributeLabel>
          <attributeDefinition>the magnitude of the velocity (the speed) on the horizontal plane for the x-axis</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <standardUnit>centimetersPerSecond</standardUnit>
              </unit>
              <precision>0.5</precision>
              <numericDomain>
                <numberType>real</numberType>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Required entry</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
        <attribute>
          <attributeName>Dir</attributeName>
          <attributeLabel>Dir</attributeLabel>
          <attributeDefinition>THe orientation of the velocity vector on the horizontal plane</attributeDefinition>
          <measurementScale>
            <ratio>
              <unit>
                <standardUnit>degree</standardUnit>
              </unit>
              <numericDomain>
                <numberType>real</numberType>
              </numericDomain>
            </ratio>
          </measurementScale>
          <missingValueCode>
            <code>Required entry</code>
            <codeExplanation>None given</codeExplanation>
          </missingValueCode>
        </attribute>
      </attributeList>
    </dataTable>
  </dataset>
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