uid=MCM,o=EDI,dc=edirepository,dc=org all public read glcrchem_DP_2002 Andrew Fountain

P.O. Box 751 Portland OR 97207 US

(503) 725-3386 andrew@pdx.edu http://glaciers.pdx.edu/fountain/ https://orcid.org/0000-0001-5299-2273 McMurdo Dry Valleys LTER http://mcmlter.org/ Thomas Nylen thomasnylen@gmail.com https://orcid.org/0000-0001-9579-8702 field crew Dorota Porazinska

1JSCB Jennie Caruthers Biotech Bldg Boulder CO 80303 US

dorota.porazinska@colorado.edu field crew Inigo San Gil

Department of Biology, MSC03 2020 University of New Mexico Albuquerque NM 87131 US

(505) 277-2625 (505) 277-2541 isangil@lternet.edu data manager 2014-01-01 English

Geochemistry data of cryoconite holes collected from Canada, Commonwealth, Howard, Hughes and Taylor glaciers in Nov 2001 and Jan 2002

anions cations chemistry cryoconite glacier ice inorganic snow Station Keywords inorganic nutrients LTER Core Areas Data contained in these files has been subjected to quality control standards imposed by the investigator. The user of this data should be aware that, while efforts have been taken to ensure that these data are of the highest quality, there is no guarantee of perfection for the data contained herein and the possibility of errors exists. If you encounter questionable data, please contact the MCM LTER data manager so that the data can be corrected or qualified. Thus, these data may be modified and future data will be appended.

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.

https://mcm.lternet.edu/content/geochemistry-data-cryoconite-holes-collected-canada-commonwealth-howard-hughes-and-taylor 2001-11-02 2002-01-31 Metadata completed in 2016 - San Gil McMurdo Dry Valleys LTER http://mcmlter.org/ McMurdo Dry Valleys LTER http://mcmlter.org/ McMurdo Dry Valleys LTER

Five glaciers (Taylor, Howard, Hughes, Commonwealth and Canada) were sampled for cryoconite hole invertebrates over a period of three weeks in November 2001 by Thomas Nylen, Nichole Alhadeff, and Dorota Porazinska. Exact sampling dates are described in the data file. All cryoconite holes at sampling time were entirely frozen. Each glacier (except Taylor) was sampled at four locations namely four corners of the glacier (Lower West, Lower East, Upper West, and Upper East). Upper and Lower description relates to topographical orientation of the glacier and East and West to geographical orientation. The Howard glacier was also sampled at the location described as Middle East. Because geographical and topographical orientation of the Taylor glacier overlap, samples were taken in a transect starting from the most West and Upper stake 90 and ending at stake 92 at the glacier's terminus. GPS coordinates were measured at each sampling location. Typically, 6 cryoconite holes at each location were drilled with a Sipre ice corer until the sediment would show up in the drilling dust accumulating on the ice surface. Each cryoconite hole was measured for diameter (N-S and E-W directions) and depth (from the ice surface to bottom of the sediment layer). Drilling was done by Thomas Nylen. At each location, two largest, two median, and two small cryoholes were sampled. All necessary equipment for drilling was pulled on banana sleds. Excavated ice cores (ony 20cm from the bottom of the sediment up) were placed in Nalgene plastic bags, carried in back packs to Lake Hoare camp, transported to McMurdo Cray Laboratory, and kept frozen till extraction.

glcrchem_DP_2002 glcrchem_DP_2002.csv 36184 1 0 \n column , " https://mcm.lternet.edu/sites/default/files/glcrchem_DP_2002.csv GLACIER GLACIER NAME OF GLACIER WHERE MEASUREMENT IS MADE string NAME OF GLACIER WHERE MEASUREMENT IS MADE LOCATION LOCATION SPECIFIC DETAILS ON THE SAMPLE LOCATION string SPECIFIC DETAILS ON THE SAMPLE LOCATION LATITUDE LATITUDE LOCATION OF SAMPLE ON GLACIER degree real LONGITUDE LONGITUDE LOCATION OF SAMPLE ON GLACIER degree real REQUIRED ENTRY None given COMMENTS COMMENTS DETAILS ABOUT SAMPLE string DETAILS ABOUT SAMPLE DATE_TIME DATE_TIME DATE date MM/DD/YYYY REQUIRED ENTRY None given SAMPLE NAME SAMPLE NAME SAMPLE NAME string SAMPLE NAME Br mg/L Br mg/L mass concentrations milligramsPerLiter real NULL None given Br uM Br (microM) micromolar concentration micromoles/liter real NULL None given Ca (mg/L) Ca (mg/L) mass concentrations milligramsPerLiter real NULL None given Ca (microM) Ca (microM) micromolar concentration micromoles/liter real NULL None given Cl (mg/L) Cl (mg/L) mass concentrations milligramsPerLiter real NULL None given Cl (microM) Cl (microM) micromolar concentration micromoles/liter real NULL None given F (mg/L) F (mg/L) mass concentrations milligramsPerLiter real NULL None given F (microM) F (microM) micromolar concentration micromoles/liter real NULL None given K (mg/L) K (mg/L) mass concentrations milligramsPerLiter real NULL None given K (microM) K (microM) micromolar concentration micromoles/liter real NULL None given Li mg/L Li mg/L mass concentrations milligramsPerLiter real NULL None given Li (microM) Li (microM) micromolar concentration micromoles/liter real NULL None given Mg (mg/L) Mg (mg/L) mass concentrations milligramsPerLiter real NULLr None given Mg (microM) Mg (microM) micromolar concentration micromoles/liter real NULL None given Na (mg/L) Na (mg/L) mass concentrations milligramsPerLiter real NULL None given Na (microM) Na (microM) micromolar concentration micromoles/liter real NULL None given NO3 (mg/L) NO3 (mg/L) mass concentrations milligramsPerLiter real NULL None given NO3 (microM) NO3 (microM) micromolar concentration micromoles/liter real NULL None given SO4 (mg/L) SO4 (mg/L) mass concentrations milligramsPerLiter real NULL None given SO4 (microM) SO4 (microM) micromolar concentration micromoles/liter real NULL None given PH pH sample pH dimensionless real 0 14 REQUIRED ENTRY None given FILE NAME FILE NAME RAW DATA FILE CONTAINING INFORMATION string RAW DATA FILE CONTAINING INFORMATION