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Data Set ID:
GGD606

Modeled Active-Layer Depth in Russia, Version 1

This data set contains modeled active-layer depth (cm) from 50 deg N to 80 deg N, and 60 deg E to 160 deg E, Russia. Depth values are calculated from a model of current climate that assumes a complex surface with inhomogenous 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.

Geographic Coverage

Parameter(s):
  • Frozen Ground > Active Layer
Spatial Coverage:
  • N: 80, S: 50, E: 160, W: 60

Spatial Resolution: Not Specified
Temporal Coverage:
  • 22 January 2003 to 4 March 2003
Temporal Resolution: Not specified
Data Format(s):
  • GIF
  • ASCII Text
Platform(s) Not specified
Sensor(s): Not specified
Version: V1
Data Contributor(s): Elena K. Molkentin, Ekaterina D Nadyozhina
Data Citation

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.

Nadyozhina, E.D 2003. Modeled Active-Layer Depth in Russia, Version 1. [Indicate subset used]. Boulder, Colorado USA. NSIDC: National Snow and Ice Data Center. [Date Accessed].

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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.

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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.

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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
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File Size

File sizes range from 2 KB to 94 KB.

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Spatial Coverage

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

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Temporal Coverage

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

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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).

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Software and Tools

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Data Acquisition and Processing

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References and Related Publications

Contacts and Acknowledgments

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

Document Information

No technical references available for this data set.
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