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Data Set ID:
NSIDC-0506

WAIS Divide Snowpit Chemical and Isotope Measurements, Antarctica, Version 1

This dataset includes major ion, trace element, microparticle and oxygen isotope (δ18O) data for a snowpit dug and sampled in December 2008 near the West Antarctic Ice Sheet (WAIS) Divide ice core site. The pit was dug approximately 4 km upwind from the drilling arch in the clean air sector of camp. Sampling was done using trace element clean techniques and all depths are in water equivalents.

Data are available via FTP in ASCII text (.txt) format.

Geographic Coverage

Spatial Coverage:
  • N: -79.433333, S: -79.433333, E: -112.3, W: -112.3

Spatial Resolution: Not Specified
Temporal Coverage:
  • 1 January 2005 to 31 December 2008
Temporal Resolution: Not specified
Parameter(s):
  • Precipitation > Snow
  • Snow/Ice > Snow Density
  • Snow/Ice > Snow/Ice Chemistry
  • Water Quality/Water Chemistry > Water Trace Elements
Platform(s) FIELD INVESTIGATION, LABORATORY
Sensor(s): ION CHROMATOGRAPHS, PARTICLE DETECTORS
Data Format(s):
  • ASCII Text
Version: V1
Data Contributor(s): Karl Kreutz, Bess Koffman

Data Citation

As a condition of using these data, you must cite the use of this data set using the following citation. For more information, see our Use and Copyright Web page.

Kreutz, K. and B. Koffman. 2011. WAIS Divide Snowpit Chemical and Isotope Measurements, Antarctica, Version 1. [Indicate subset used]. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. doi: http://dx.doi.org/10.7265/N5SJ1HHN. [Date Accessed].

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Detailed Data Description

Format

This data set is provided in comma delimited ASCII text (.txt) format.

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File and Directory Structure

Table 1 provides descriptions of the files in the data set.

Table 1. File Description
Directory Description

Kreutz_ 2008_snowpit_Major_ions.txt

Ion chromatography data, samples analyzed on a Dionex ion chromatograph

Kreutz_2008_snowpit_Dust.txt

Particle concentration data, samples analyzed using a Micromeritics Elzone 5380 with a 30 um orifice tube at the University of Maine

Kreutz_2008_snowpit_ICPMS.txt

Trace element data, analyzed using a Thermo Electron Element2 Inductively Coupled Plasma Mass Spectrometer (ICP-MS)

Kreutz_2008_snowpit_isotopes.txt

Isotope data, samples analyzed using a Stable Isotope Ratio Analysis (SIRA) mass spectrometer

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File Size

Files are 4 KB each.

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Volume

The entire data set is approximately 12 KB.

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Spatial Coverage

These data were collected from a snow pit, dug approximately 4 km upwind of the West Antarctic Ice Sheet (WAIS) Divide ice core site.

Latitude: 79°26.353' S 
Longitude: 112°18.097' W

Vertical Resolution:
Isotopes and ions: 0.02 m
Trace elements and dust: 0.07 m

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Temporal Coverage

Data were collected between 2005 and 2008.

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Parameter or Variable

Parameter Description

This dataset includes major ion, trace element, microparticle (dust), and δ18O data for a snowpit dug and sampled in December 2008 near the WAIS Divide ice core site.

Major Ions

Na, K, Mg, Ca, MS, Cl, NO3 and SO4, all in units of μg/L (ppb)

Trace Elements

Isotope and resolution mode indicated: (LR: Low Resolution, MR: Medium Resolution, HR: High Resolution)

Sr88(LR), Cd111(LR), Cs133(LR), Ba138(LR), La139(LR), Ce140(LR), Pr141(LR), Pb208(LR), Bi209(LR), U238(LR), As75(LR), Li7(LR), Al27(MR), S32(MR), Ca44(MR), Ti47(MR), V51(MR), Cr52(MR), Mn55(MR), Fe56(MR), Co59(MR), Na23(MR), Mg24(MR), Cu63(MR), Zn66(MR) and K39(HR). Units vary and are indicated in the text file.

Microparticle Concentration

Provided in particles/mL

Oxygen Isotope (δ18O)

Isotope data are in parts per mL with respect to Standard Mean Ocean Water (SMOW)

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Software and Tools

Software and Tools

Data are accessible using standard spreadsheet software.

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Data Acquisition and Processing

Theory of Measurements

This dataset includes major ion, trace element, microparticle and δ18O data for a snowpit dug and sampled in December 2008 near the WAIS Divide ice core site (79.468° S, 112.086° W).

Researchers dug a snow pit approximately 4 km upwind from the deep ice core drilling arch in the clean air sector of camp. The pit was dug using metal handsaws and shovels to a depth of 1.3 m, then a wall was dug back using a plastic shovel cleaned with Citranox. Finally, the wall for sampling was scraped using Citranox cleaned scrapers (for major ions) and, on a separate surface and afterward, nitric acid cleaned scrapers (for trace elements). Sampling was performed in Tyvek clean suits and poly gloves. Snow was collected using a pure titanium sampling device and snow samples were collected into Citranox cleaned (for major ions and isotopes) or nitric acid cleaned (for trace elements) bottles.

All bottles were double-bagged in Ziploc bags and shipped frozen back to the University of Maine. Density was measured at 5 cm resolution and used to correct snow depths to water equivalents. Snow samples were melted in a class 1000 clean room and poured into analysis vials under a laminar flow hood. Major ions were measured using a Dionex ion chromatograph, all in units of μg/L (ppb). Trace elements were measured using a Thermo Electron Element II ICP-SMS. Units vary and are indicated in the text file. Microparticle data, collected using a Klotz Abakus laser particle detector, are given in particles/mL. Isotope data are in parts per mL with respect to SMOW.

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Contacts and Acknowledgments

Dr. Karl Kreutz 
Climate Change Institute 
University of Maine 
236 Sawyer Hall 
Orono, Maine 04469 
USA

Bess Koffman 
University of Maine 
236 Sawyer Hall 
Orono, Maine 04469 
USA 

Acknowledgements: 

This research was funded by National Science Foundation (NSF) Office of Polar Programs (OPP) grant number 0636740.

Document Information

DOCUMENT CREATION DATE

December 2011

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