Science Keywords>TERRESTRIAL HYDROSPHERE>GLACIERS/ICE SHEETS
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Millennially Averaged Accumulation Rates for Lake Vostok
Entry ID:
NSIDC-0500
Summary
Abstract:
This data set consists of inferred accumulation rates from three radar layers (26, 35 and 41 thousand years old) in the Vostok Subglacial Lake region. Accumulation rates were inferred using Local-Layer Approximation (LLA), which assumes that the strain-rate history of a particle traveling through the ice sheet can be approximated by the vertical strain-rate profile at the current position of the particle, which the researchers assume to be uniform. Parameters include location, in latitude and longitude, polar stereographic coordinates, and local grid X and Y coordinates, along with layer age, in thousands of years (ka), and inferred accumulation rate (cm/a). The data cover a 150 by 350 km area. Data are available via FTP, as a text file (.txt) with columns in comma separated value format.
Geographic Coverage
(Click for Interactive Map)
Spatial coordinates
Data Set Citation
Dataset Originator/Creator:
J. MacGregor, K. Matsuoka, M. Studinger, E. Waddington, and D. Winebrenner
Dataset Title:
Millennially Averaged Accumulation Rates for the Lake Vostok Region
Dataset Release Date:
2011-08-01
Dataset Release Place:
Boulder, Colorado, USA
Dataset Publisher:
National Snow and Ice Data Center (NSIDC)
Online Resource:
http://nsidc.org/data/nsidc-0500.html
Temporal Coverage
Start Date:
2000-01-01
Stop Date:
2001-12-31
Location Keywords
Data Resolution
Latitude Resolution:
1.5 km
Longitude Resolution: 1.5 km Science Keywords
ISO Topic Category
Project
Quality
The accuracy and precision of the DEM is not adequate for the detection of real ice surface elevation changes over time, and thus the DEM should not be used for such purposes. Additional processing would be necessary before the DEM could be used as part of a scheme for elevation change detection.
Access Constraints
This data set is available for non-profit, research-oriented purposes only. Prospective users of the product are required to complete a Research Agreement stating that the image and elevation data will be only be used under the specified terms and conditions.
Use Constraints
For non-profit, research-oriented purposes only.
Data Set Progress
COMPLETE
Originating Center
Data Center
Distribution
Distribution Media:
CD-ROM
Distribution Format:
DEM data = 2-byte integers in PC-byte order flat
Fees:
none
Distribution Media:
CD-ROM
Distribution Format:
SAR data = 'flat' byte file with no header
Fees:
none
Personnel
Role:
TECHNICAL CONTACT
Phone:
+1 (303) 492-6199
Fax:
+1 (303) 492-2468
Email:
nsidc at nsidc.org
Contact Address:
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
City:
Boulder
Province or State:
CO
Postal Code:
80309-0449
Country:
USA
Publications/References
Andersen, Ole Baltazar. 1994. ERS-1 altimetry on the Greenland ice sheet: Preliminary investigations of annual variations. Geophysical Research Letters 21(15):1655-1658.
Binschadler, R. A., and P. L. Vornberger. 1993. Interpretation of SAR imagery of the Greenland ice sheet using coregistered TM imagery. Remote Sensing of Environment 167-175. Ekholm, S. 1996. A full coverage, high-resolution ... Extended Metadata Properties
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Creation and Review Dates
DIF Creation Date:
1997-01-01
Last DIF Revision Date:
2012-05-14
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