Model Output of Active Layer Depth in the Arctic Drainage Basin, 1979-2001
Entry ID: ARCSS158

[ Update this Record ]

Summary
Abstract: 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.

Related URL
Link: VIEW PROJECT HOME PAGE
Description: ArcticRIMS Web site


Geographic Coverage
 N: 83.6166 S: 45.3498  E: 180.0  W: -180.0

Data Set Citation
Dataset Originator/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, CO, USA
Dataset Publisher: National Snow and Ice Data Center (NSIDC)
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
GEOGRAPHIC REGION > POLAR


Science Keywords
CRYOSPHERE >FROZEN GROUND >ACTIVE LAYER >DEPTH    [Definition]
CRYOSPHERE >FROZEN GROUND >SOIL TEMPERATURE    [Definition]


ISO Topic Category
CLIMATOLOGY/METEOROLOGY/ATMOSPHERE


Platform
Models    [Information]


Project
NSF/PLR >Division of Polar Programs, National Science Foundation    [Information]


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.


Keywords
Active Layer
Active Layer Depth
ARCSS
ARCSS Data Coordination Center
ARCSS158
Arctic Basin
Continuous Permafrost
Discontinuous Permafrost
OPP-0229766
Permafrost


Data Set Progress
IN WORK


Originating Center
NSIDC_ARCSS


Data Center
National Snow and Ice Data Center    [Information]
Data Center URL: http://nsidc.org

Data Center Personnel
Name: NSIDC USER SERVICES
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


Arctic System Science Data Coordination Center    [Information]
Data Center URL: http://nsidc.org/arcss/
Dataset ID: arcss158

Data Center Personnel
Name: NSIDC ARCSS USER SERVICES
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


Frozen Ground Data Center    [Information]
Data Center URL: http://nsidc.org/fgdc/
Dataset ID: arcss158

Data Center Personnel
Name: NSIDC FGDC USER SERVICES
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



Distribution
Distribution_Media: FTP
Distribution_Size: 451 MB
Distribution_Format: compressed (.zip) ASCII text files


Personnel
TINGJUN ZHANG
Role: INVESTIGATOR
Phone: 303-492-6199
Fax: 303-492-2359
Email: nsidc at nsidc.org
Contact Address:
National Snow and Ice Data Center
University of Colorado
CIRES, 449 UCB
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 at 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 at nsdic.org
Contact Address:
National Snow and Ice Data Center


NSIDC USER SERVICES
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
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-...

Creation and Review Dates
DIF Creation Date: 2006-05-17
Last DIF Revision Date: 2012-05-13

[ Update this Record ]


Link to Web Site