uid=MCM,o=EDI,dc=edirepository,dc=org all public read 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/ Denise Steigerwald data manager 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 2014-10-30 English

As a part of the McMurdo Dry Valleys LTER program, isotope ratios have been determined from 295 ice/snow samples in Taylor Valley, Antarctica. Hydrogen/deuterium isotope ratios are given for all samples, and for a subset, there are oxygen isotope ratios, and a deuterium-excess. Values are reported relative to VSMOW, +/- 1.0 per mil for hydrogen, and +/- 0.1 for oxygen.

deuterium deuterium isotope ratio glacier isotope isotope ratio oxygen isotope ratio Station Keywords isotopes stable isotopes LTER Controlled Vocabulary 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/isotope-ratios-ice-and-snow-taylor-valley The Canada Glacier a small glacier flowing south-east into the northern side of Taylor Valley.  The glacier receives less than 10 cm of snowfall annually. Its seasonal melting feeds Lake Hoare to the west and Lake Fryxell to the east. 162.894287109375 163.057708740234 -77.598403930664 -77.632133483887 The Commonwealth glacier flows in a southeasterly direction and enters the northern side of Taylor Valley immediately west of Mount Coleman. Named by the British Antarctic Expedition for the Commonwealth of Australia in the early 1900s.   163.197784423828 163.373565673828 -77.545059204102 -77.589111328125 286 286 meter The Suess Glacier is between the Canada Glacier and Lacroix Glacier, flowing south into Taylor Valley. Scott named after the early nineties British Antarctic Expedition for Professor Eduard Suess. 162.647781372070 162.744598388672 -77.633750915527 -77.651824951172 1000 1000 meter The Taylor Glacier is an Antarctic glacier about 54 kilometres (34 mi) long, flowing from the plateau of Victoria Land into the western end of Taylor Valley, north of the Kukri Hills, south of the Asgard Range. The middle part of the glacier is bounded on the south by Beacon Valley.Scott (early nineties British Antarctic expedition) named the glacier for Griffith Taylor, geologist and leader of the Western Journey Party of the British Antarctic expedition.Like other glaciers in the McMurdo Dry Valleys, Taylor Glacier is “cold-based,” meaning its bottom is frozen to the ground below.   161.683044433594 162.280426025391 -77.721229553223 -77.769035339355 Hughes Glacier is a small alpine glacier flowing toward Lake Bonney in Taylor Valley from the Kukri Hills on the south. Named for Professor McKenny Hughes. 162.437667846680 162.581527709961 -77.727073669434 -77.749969482422 Howard is a small alpine glacier just west of Crescent Glacier, flowing into Taylor Valley on the north from the Kukri Hills. Geologist T.L. Pewe studied and named it for Arthur D. Howard, 163.036087036133 163.147994995117 -77.662025451660 -77.687744140625 717 717 meter 1993-01-01 1997-12-31 Data from this table was submitted to Denise Steigerwald (MCM LTER data manager) by Bruce Vaughn on a floppy disk. The file was in ascii text, tab delimited format, and can be found in the data manager's home directory on INSTAAR's Unix system. Once submitted, the data manager used Microsoft Excel and Access to fine-tune the file and get it in more of a relational mode. Changes made include the following: * The 'YR/ID' field was renamed to 'sample#', and had the year portion removed. Information for sample year is represented in the date field. * The 'Type' field was renamed to 'sample type', and written out as "snowpit" rather the abbreviation "P". Once the above changes were made, the file was exported into comma delimited ascii format and MS-DOS text format for presentation on the web page. The resulting files (snptistp.dat and snptistp.txt) contain a link to this page. Metadata was completed in 2016 McMurdo Dry Valleys LTER http://mcmlter.org/ McMurdo Dry Valleys LTER http://mcmlter.org/ McMurdo Dry Valleys LTER

The samples were obtained in 3 field seasons: 1993-94, 1994-95, and 1996-97. The samples were analyzed by Bruce Vaughn at the Stable Isotope Lab at INSTAAR (Institute of Arctic and Alpine Research), University of Colorado. For the samples obtained during the 1993-94 year, a duplicate set was analyzed by Tyler Coplen at the US Geological Survey, in Reston, Virginia. For the analysis of hydrogen isotopes, the uranium reduction method was used at INSTAAR, and the platinum-catalyst equilibration method was used at the USGS. For oxygen isotopes, the standard CO2/H2O equilibration method was used at both labs. There was agreement between the analyses done at the two labs.

istp istp.csv 29568 1 0 \n column , " https://mcm.lternet.edu/sites/default/files/istp.csv

The samples were obtained in 3 field seasons: 1993-94, 1994-95, and 1996-97. The samples were analyzed by Bruce Vaughn at the Stable Isotope Lab at INSTAAR (Institute of Arctic and Alpine Research), University of Colorado. For the samples obtained during the 1993-94 year, a duplicate set was analyzed by Tyler Coplen at the US Geological Survey, in Reston, Virginia. For the analysis of hydrogen isotopes, the uranium reduction method was used at INSTAAR, and the platinum-catalyst equilibration method was used at the USGS. For oxygen isotopes, the standard CO2/H2O equilibration method was used at both labs. There was agreement between the analyses done at the two labs.

GLACIER GLACIER Name of glacier string Name of glacier SAMPLE_NUMBER SAMPLE# SAMPLE Number string SAMPLE Number DATE_TIME DATE_TIME DATE AND TIME SAMPLES WERE COLLECTED IN THE FIELD date MM/DD/YYYY SAMPLE_TYPE SAMPLE_TYPE AREA WHERE SAMPLE WAS GATHERED (ICE, FRESH SNOW, SNOWPIT,STREAM WATERS) string AREA WHERE SAMPLE WAS GATHERED (ICE, FRESH SNOW, SNOWPIT,STREAM WATERS) STAKE_NUMBER STAKE# STAKE NUMBER string STAKE NUMBER LAYER LAYER SNOWPIT LAYER string SNOWPIT LAYER Bottom Depth/Range (cm) BOTTOM DEPTH / RANGE OF SAMPLE (CM) RANGE OF SNOWPIT LAYER centimeter real NULL None given Location Comments Location Comments Comments about the sampling location string Comments about the sampling location LATITUDE LATITUDE ANGULAR DISTANCE SOUTH OF EQUATOR degree real -90 0 NULL None given LONGITUDE LONGITUDE ANGULAR DISTANCE EAST OF GREENWICH MERIDIAN degree 0.000001 real 0 360 NULL None given UTM easting (m) UTM easting (m) Easting coordinates meter real Required entry None given UTM northing (m) UTM northing (m) Northing coordinates meter real Required entry None given ELEVATION (m) ELEVATION (m) ELEVATION OF SAMPLE SITE meter real NULL None given DEUTERIUM ISOTOPE RATIO DEUTERIUM ISOTOPE RATIO DEUTERIUM ISOTOPE PER MIL, RELATIVE TO VSMOW PERMIL real NULL None given OXYGEN ISOTOPE RATIO OXYGEN ISOTOPE RATIO OXYGEN ISOTOPE PER MIL, RELATIVE TO VSMOW PERMIL real NULL None given DEUTERIUM EXCESS DEUTERIUM EXCESS DEUTERIUM ISOTOPE RATIO MINUS 8 TIMES RELATIVE TO OXYGEN ISOTOPE RATIO VSMOW PERMIL real NULL None given FILE NAME FILE NAME NAME OF FILE ORIGINALLY SUBMITTED string NAME OF FILE ORIGINALLY SUBMITTED