Model Output of Active Layer Depth in the Arctic Drainage Basin, 1979-2001  View Catalog Page Entry ID
ARCSS158
Summary
Investigators applied the Frozen Ground Model to the entire Arctic Drainage Basin to create this data set of active layer depth (ALD), recorded in centimeters. This model has been shown to provide excellent results for active layer depth and soil temperatures when driven with well-known boundary conditions and forcing parameters at specific locations. The model is driven by 2-meter air temperatures from the ERA-40 European Centre for Medium-Range Weather Forecasts (ECMWF) reanalysis. The reanalysis data are provided on a N80 reduced Gaussian grid, which is symmetric about the Equator with 80 latitudinal points in each hemisphere.
Data represent a subset of the entire 25 km Equal-Area Scalable Earth Grid (EASE-Grid) for the Northern Hemisphere (721 x 721 = 39,926 grid cells). There are monthly files for 23 years, 1979-2001, with a daily time step. Data are in space-delimited ASCII text format, and are available via FTP.
Geographic Coverage
Spatial Coordinates:
N: 83.6166°
S: 45.3498°
E: 180°
W: -180°
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Data Set Citation
Dataset Creator: Tingjun Zhang
Dataset Title: Model Output of Active Layer Depth in the Arctic Drainage Basin, 1979-2001
Dataset Release Date: 2006-05-17
Dataset Release Place: Boulder, Colorado USA
Dataset Publisher: NSIDC: National Snow and Ice Data Center
Online Resource: http://nsidc.org/data/arcss158.html
Temporal Coverage
Start Date: 1979-01-01
Stop Date: 2001-12-31
Location Keywords
- GEOGRAPHIC REGION ARCTIC
Science Keywords
- Cryosphere Frozen Ground Active Layer Depth
- Cryosphere Frozen Ground Soil Temperature
Ancillary Keywords
- Active Layer
- Active Layer Depth
- ARCSS
- ARCSS158
- ARCSS Data Coordination Center
- Arctic Basin
- Continuous Permafrost
- Discontinuous Permafrost
- OPP-0229766
- Permafrost
- Climatology/Meteorology/Atmosphere
Platform
Quality
Modeled thaw depths for sporadic permafrost areas, mainly in the southern parts of the Arctic drainage domain, are spuriously high. In these regions, the permafrost is very isolated and occurs at sub-grid scales. The forcing data sets (surface air temperature, snow cover, and soil bulk density) are likely not representative of the true forcing conditions for these small areas and produce an unrealistic increase in thaw depth with time. Frozen ground depths of small non-permafrost areas within discontinuous permafrost are likely too high, as forcing parameters are more representative of the colder permafrost climate condition at these grid cells.
ERA-40 2-meter air temperatures are used. There is no topographical correction.
Data Set Progress
in work
Originating Center
NSIDC_ARCSS
Data Center
NSIDC Arctic System Science Data Coordination Center
Data Center URL: http://nsidc.org/arcss/
Data Center Personnel
Name: NSIDC ARCSS User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@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
NSIDC Frozen Ground Data Center
Data Center URL: http://nsidc.org/fgdc/
Data Center Personnel
Name: NSIDC FGDC User Services
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: nsidc@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
Distribution
Distribution Media: FTP
Distribution Size: 451 MB
Distribution Format: ASCII Text
Personnel
Tingjun Z Zhang
Role: INVESTIGATOR
Phone: 1 303 492-6199 x
Fax: 1 303 492-2359 x
Email: nsidc@nsidc.org
Contact Address:
- University of Colorado
- National Snow and Ice Data Center/World Data Center for Glaciology
- UCB449
City: Boulder
Province or State: Colorado
Postal Code: 80309-0449
Country: USA
R. G. Barry
Role: INVESTIGATOR
Contact Address:
- University of Colorado
- National Snow and Ice Data Center/World Data Center for Glaciology
- 449 UCB
City: Boulder
Province or State: CO
Postal Code: 80309-0449
Country: USA
Christoph Oelke
Role: INVESTIGATOR
Phone: 1 303 492-6199
Fax: 1 303 492-2468
Email: coelke@nsidc.org
Contact Address:
- National Snow and Ice Data Center
- 449 UCB, University of Colorado
City: Boulder
Province or State: Colorado
Postal Code: 80309-0449
Country: USA
Andrew Etringer
Role: INVESTIGATOR
Email: etringer@nsdic.org
Contact Address:
- National Snow and Ice Data Center
NSIDC User Services
Role: TECHNICAL CONTACT
Phone: 1 303 492-6199 x
Fax: 1 303 492-2468 x
Email: nsidc@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
Related URL
VIEW PROJECT HOME PAGE
ArcticRIMS
VIEW PROJECT HOME PAGE
ArcticRIMS Web site
VIEW PROJECT HOME PAGE
Time Series of Active Layer Thickness in the Russian Arctic, 1930-1990
Reference
Armstrong, R. L., and M. J. Brodzik. 2002. Northern Hemisphere EASE-Grid weekly snow cover and sea ice extent, Version 2. Boulder, CO. National Snow and Ice Data Center. CD-ROM.
Chang, A. T. C., J. L. Foster, and D. K. Hall. 1987. Nimbus-7 SMMR derived global snow cover parameters. Annals of Glaciology 9, 39-44.
European Centre for Medium-Range Weather Forecasts. 2002. ERA-40 Project Report Series 3. Workshop on Re-analysis, 5-9 November 2001. European Center for Medium Range Weather Forecasts 443 pp.
European Centre for Medium-Range Weather Forecasts. 21 January 2004. '2.3 Horizontal interpolation.' Bilinear Interpolation Scheme. Available from http://www.ecmwf.int/research/ifsdocs/CY25r1/Technical/Technical-3-04.html#wp961
Metadata Name and Version
Metadata Name: CEOS IDN DIF
Metadata Version: 9.7
Creation and Review Dates
DIF Creation Date: 2006-05-17
Last DIF Revision Date: 2012-06-04
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