This data set is part of the West Antarctic Ice Sheet Cores (WAISCORES) project, an NSF-funded project to understand the influence of the West Antarctic Ice Sheet on climate and sea level change. WAISCORES researchers acquired and analyzed snow pit and core samples from the Siple Dome, in the Siple Coast region, West Antarctica. This data set includes glaciochemical spatial variability data for six Siple Dome snow pits. Samples involved measuring hydrogen peroxide (H2O2) and formaldehyde (HCHO) in the air, snow, firn, and ice via suppressed ion chromatography. The data can be used to interpret changes in concentrations of these species recorded in ice cores. Data in this collection were obtained during two Antarctic field seasons in 1994 to 1995 and 1996 to 1997. Data are available via FTP in tab-delimited ASCII text (.dat, .txt) file format.
DOWNLOADING DATA VIA FTP
Data can be downloaded through a Web browser or command line via FTP. When using a Web browser, the FTP link first directs you to an Optional Registration Form that if filled out, will allow you to receive notifications about updates or processing changes related to that specific data set. After completing the Optional Registration Form, the FTP directory becomes available. For additional help downloading data through an FTP client, go to the How to access data using an FTP client support page.
Snow-atmosphere Transfer Function for Reversibly Deposited Chemical Species in West Antarctica, Version 1
|Spatial Resolution:||Not Specified|
|Temporal Resolution:||Not specified|
|Platform(s)||GROUND STATIONS, GROUND-BASED OBSERVATIONS, LABORATORY|
|Data Contributor(s):||Roger Bales, Joseph McConnell|
|Metadata XML:||View Metadata Record|
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.Bales, R. and J. McConnell. 2002. Snow-atmosphere Transfer Function for Reversibly Deposited Chemical Species in West Antarctica, Version 1. [Indicate subset used]. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. doi: http://dx.doi.org/10.7265/N5ZP441W. [Date Accessed].
Detailed Data Description
Data are available as tab-delimited ASCII text files (.
Data are available on the FTP site in the
ftp://sidads.colorado.edu/pub/DATASETS/AGDC/waiscores/bales/ directory. Table 1 lists the files in this directory:
||Hydrogen peroxide (H2O2) and formaldehyde (HCHO) measurements for snow pits 1, 2 and 6 from UNH, 1994|
||Hydrogen peroxide (H2O2) and formaldehyde (HCHO) measurements for snow pits, 1996|
||Notes related to the data set, available as an ASCII text file|
Files are named according to the following convention and as described in Table 2:
|YY||2-digit year, 94 or 96|
|X||Snow pit site identification:
The data set contains 7 files ranging in size from 1 KB to 7 KB.
The total volume of the data set is 40 KB.
Ice core data were collected at the Siple Dome site in the Siple Coast region of Antarctica.
Southernmost Latitude: 81°S
Northernmost Latitude: 81°S
Westernmost Longitude: 149°W
Easternmost Longitude: 149°W
Data were obtained during two Antarctic field seasons (November to February) in 1994 to 1995 and 1996 to 1997.
Parameters for hydrogen peroxide concentration analysis include the depth in meters (m) and hydrogen peroxide (H2O2) concentration in micromolars (uM).
Chemical species data files include depth and concentration measurements for snow pits at Siple Dome summit. Table 3 provides details on the files and parameters.
|Chemical Species Analysis|
|Hydrogen Peroxide Concentration||File containing atmospheric concentrations of hydrogen peroxide in micromolars (uM) and depth in meters (m)|
Sample Data Record
Below is a sample record of the hydrogen peroxide (H2O2) concentration analysis data files from 96pitb_h2o2.dat. Only the first four data records are shown.
Hydrogen Peroxide Analysis:
|H2O2 (uM)||Depth (m)|
Software and Tools
Data Acquisition and Processing
Snow pit and core samples were collected at three snow pits on the Siple Dome summit during the 1994 to 1995 season and at three snow pits during the 1996 to 1997 season. Samples were analyzed at high resolution for hydrogen peroxide (H2O2) concentration. Workers used nonparticulating suits, polyethylene gloves, and particle masks to collect all snow pit and core samples without chemical contamination. Hydrogen peroxide concentration measurements were measured via suppressed ion chromatography. For more information on data acquisition and processing methods, see the researchers' notes in metah2o2.txt, the Major Findings, and the References and Related Publications listed below.
References and Related Publications
Contacts and Acknowledgments
Dr. Roger Bales
University of Arizona
Department of Hydrology and Water Resources
Tucson, AZ 85721
Dr. Joseph McConnell
Desert Research Institute
Division of Hydrological Sciences
2215 Raggio Parkway
Reno, NV 89512
This research was supported by NSF ANT grant 9526572.
DOCUMENT CREATION DATE
28 December 2009