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Modeled Active-Layer Depth in Russia

Summary

This data set contains modeled active-layer depth (cm) from 50°N to 80° N, and 60°E to 160°E, Russia. Depth values are calculated from a model of current climate that assumes a complex surface with inhomogeneous vegetation and soil texture, and from a model of projected climate for the year 2050 that assumes uniform vegetation and soil. Tab-delimited ASCII text files contain active-layer depth values (cm) with corresponding latitudes and longitudes in decimal degrees. Maps of active-layer depth (cm) are in GIF image format. Data are available via FTP.

Citing These Data:

Nadyozhina, E.D. 2003. Modeled Active-Layer Depth in Russia. Boulder, CO: National Snow and Ice Data Center. Digital Media.

Overview Table

Category Description
Data format Tab-delimited ASCII text files contain modeled active-layer depth values (cm) with corresponding latitudes and longitudes in decimal degrees. Maps of active-layer depth (cm) are in GIF image format.
Spatial coverage The study area is confined to:
Northwest latitude: 80 N
Northwest longitude: 60 E
Southeast latitude: 50 N
Southeast longitude: 160 E
Temporal coverage Active-layer depth values are calculated from models constructed from a current climate and a projected climate for the year 2050.
File naming convention ggd606_fig*.gif, ggd606_table*.txt
File size File sizes range from 2 KB to 94 KB.
Parameter(s) Active-layer depth (cm)
Procedures for obtaining data Data are available via FTP.

Table of Contents

1. Contacts and Acknowledgments
2. Detailed Data Description
3. References and Related Publications
4. Document Information

1. Contacts and Acknowledgments:

Investigator(s) Name and Title:

Ekaterina D. Nadyozhina
Main Geophysical Observatory
Karbyshev St., 7
St. Petersburg, 194021
Russia

Technical Contact:

NSIDC User Services
National Snow and Ice Data Center
CIRES, 449 UCB
University of Colorado
Boulder, CO 80309-0449  USA
phone: +1 303.492.6199
fax: +1 303.492.2468
form: Contact NSIDC User Services
e-mail: nsidc@nsidc.org

2. Detailed Data Description:

Format:

Tab-delimited ASCII text files contain active-layer depth values (cm) with corresponding latitudes and longitudes in decimal degrees. Maps of active-layer depth (cm) are in GIF image format.

File Naming Convention:

ggd606_fig1.gif: Active-layer depth map for Obskaya Guba (northwest Siberia) for a current climate that assumes a complex surface with inhomogeneous vegetation and soil texture.

ggd606_fig2.gif: Active-layer depth map for Obskaya Guba (northwest Siberia) for a projected climate in the year 2050 that assumes a complex surface with inhomogeneous vegetation and soil texture.

ggd606_table1.txt Textual summary of current and projected active-layer depth values from "ggd606_fig1.gif" and "ggd606_fig2.gif," respectively, in one-degree increments of latitude and longitude.

ggd606_fig3.gif: Active-layer depth map for areas of loam covered by lichen for a current climate that assumes uniform vegetation and soil.

ggd606_fig4.gif: Active-layer depth map for areas of loam covered by lichen for a projected climate in the year 2050 that assumes uniform vegetation and soil.

ggd606_table2.gif: Textual summary of current and projected active-layer depth values from "ggd606_fig3.gif" and "ggd606_fig4.gif," respectively, in one-degree increments of latitude and longitude.

ggd606_fig5.gif: Active-layer depth map for areas of peat covered by moss for a projected climate in the year 2050 that assumes uniform vegetation and soil.

ggd606_fig6.gif: Active-layer depth map for sandy areas for a projected climate in the year 2050 that assumes uniform vegetation and soil.

ggd606_table3.txt: Textual summary of projected active-layer depth values for peat and sand from "ggd606_fig5.gif" and "ggd606_fig6.gif," respectively, in one-degree increments of latitude and longitude.

ggd606_fig7.gif: Active-layer depth map for areas of peat covered by moss for a current climate that assumes uniform vegetation and soil.

ggd606_fig8.gif: Active-layer depth map for sandy areas for a current climate that assumes uniform vegetation and soil.

ggd606_table4.txt: Textual summary of current active-layer depth values for peat and sand from "ggd606_fig7.gif" and "ggd606_fig8.gif," respectively, in one-degree increments of latitude and longitude.

Sample Data Record:

Following is a sample of the first several lines of "table1.txt:"

               active- active-
               layer  layer
               depth  depth
Lat(N) Long(E) (cm)   (cm)
              current projected
               climate values

  72,5   69,5  0,21   0,91
  72,5   70,5  0,25    0,9
  72,5   71,5  0,12   0,56
  72,5   72,5  0,19   0,39
  72,5   75,5  0,17   0,32
  71,5   68,5  0,21   0,98
  71,5   69,5  0,18   0,51

File Size:

File sizes range from 2 KB to 94 KB.

Spatial Coverage:

Northwest latitude: 80 N
Northwest longitude: 60 E
Southeast latitude: 50 N
Southeast longitude: 160 E

Temporal Coverage:

Active-layer depth values are calculated from models constructed from a current climate and a projected climate for the year 2050.

Parameter or Variable:

Nadyozhina calculated active-layer depth (cm) for both a current climate that assumes a complex surface with inhomogeneous vegetation and soil texture, and for a projected climate for the year 2050 that assumes uniform vegetation and soil. She constructed the current climate from a ground heat transfer model derived from National Center for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) reanalyses. She constructed a projected climate for the year 2050 from the Main Geophysical Observatory (MGO) Global Climate Model (GCM).

3. References:

Malevsky-Malevich, S.P., E.K. Molkentin, E.D. Nadyozhina, and O.B. Shklyarevich. 2001. Numerical simulation of permafrost parameters distribution in Russia. Cold Regions Science and Technology 32:1-11.

Malevsky-Malevich, S.P., E.K. Molkentin, E.D. Nadyozhina, V.V. Simonov, and O.B. Shklyarevich. 2000. Model calculations of permafrost development and silt season thawing layer distribution for the current climate in the North regions of West Siberia. Earth Cryosphere 4(4).

4. Document Information:

Document Creation Date:

March 2003

Document Revision Date:

March 2003

Document URL:

http://nsidc.org/data/docs/fgdc/ggd606_permafrost_russia

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