Circum-Arctic map of permafrost and ground ice conditions (v2) (1997)- A Big Earth Data Platform for Three Poles

The data set includes 1. permaice (map of frozen soil types), 2. subsea (subsea boundary vectorgraph), 3. treeline (timberline vectorgraph), 4. nhipa (grid map) and 5. llipa (grid map).

Permaice includes the following attribute fields: Num_code (frozen soil attribute code),

Combo (frozen soil attribute), extent (frozen soil coverage) and content (ice content).

The attribute comparison is as follows. (1) Frozen soil attribute comparison table:

0 （No information）

1 - chf （Continuous permafrost extent with high ground ice content and thick overburden）

2 - dhf （Discontinuous permafrost extent with high ground ice content and thick overburden）

3 - shf （Sporadic permafrost extent with high ground ice content and thick overburden）

4 - ihf （Isolated patches of permafrost extent with high ground ice content and thick overburden）

5 - cmf （Continuous permafrost extent with medium ground ice content and thick overburden）

6 - dmf （Discontinuous permafrost extent with medium ground ice content and thick overburden）

7 - smf （Sporadic permafrost extent with medium ground ice content and thick overburden）

8 - imf （Isolated patches of permafrost extent with medium ground ice content and thick overburden）

9 - clf （Continuous permafrost extent with low ground ice content and thick overburden）

10 - dlf （Discontinuous permafrost extent with low ground ice content and thick overburden）

11 - slf （Sporadic permafrost extent with low ground ice content and thick overburden）

12 - ilf （Isolated patches of permafrost extent with low ground ice content and thick overburden）

13 - chr （Continuous permafrost extent with high ground ice content and thin overburden and exposed bedrock）

14 - dhr （Discontinuous permafrost extent with high ground ice content and thin overburden and exposed bedrock）

15 - shr （Sporadic permafrost extent with high ground ice content and thin overburden and exposed bedrock）

16 - ihr （Isolated patches of permafrost extent with high ground ice content and thin overburden and exposed bedrock）

17 - clr （Continuous permafrost extent with low ground ice content and thin overburden and exposed bedrock）

18 - dlr （Discontinuous permafrost extent with low ground ice content and thin overburden and exposed bedrock）

19 - slr （Sporadic permafrost extent with low ground ice content and thin overburden and exposed bedrock）

20 - ilr （Isolated patches of permafrost extent with low ground ice content and thin overburden and exposed bedrock）

21 - g （Glaciers）

22 - r （Relict permafrost）

23 - l （Inland lakes）

24 - o （Ocean/inland seas）

25 - ld （Land）

（2）The frozen soil coverage attribute comparison table

c = continuous (90-100%)

d = discontinuous (50-90%)

s = sporadic (10-50%)

i = isolated patches (0-10%)

（3）The ice content comparison table

h = high (>20% for "f" landform codes) (>10% for "r" landform codes)

m = medium (10-20%)

l = low (0-10%)

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Projection of the shapefiles is:

PROJCS["Sphere_ARC_INFO_Lambert_Azimuthal_Equal_Area",

GEOGCS["GCS_Sphere_ARC_INFO",

DATUM["Sphere_ARC_INFO", SPHEROID["Sphere_ARC_INFO",6370997.0,0.0]],

PRIMEM["Greenwich",0.0],

UNIT["Degree",0.0174532925199433]],

PROJECTION["Lambert_Azimuthal_Equal_Area"],

PARAMETER["False_Easting",0.0],

PARAMETER["False_Northing",0.0],

PARAMETER["longitude_of_center",180.0],

PARAMETER["latitude_of_center",90.0],

UNIT["Meter",1.0]]

Projection for the raster (*.byte) files is:

Projection: Lambert Azimuthal

Units: meters

Spheroid: defined

Major Axis: 6371228.00000

Minor Axis: 6371228.000

Parameters:

radius of the sphere of reference: 6371228.00000

longitude of center of projection: 0

latitude of center of projection: 90

false easting (meters): 0.00000

false northing (meters): 0.00000

Data Citations Data citation guideline What's data citation?

Cite as:

O., F., J. A. Heginbottom., E., M., Zhang, T., Ran, Y. (2011). Circum-Arctic map of permafrost and ground ice conditions (v2) (1997). A Big Earth Data Platform for Three Poles, (Download the reference： RIS | Bibtex )

Related Literatures:

1. Zhang, T., J.A. Heginbottom, R.G. Barry, and J. Brown. 2000. Further Statistics on the Distribution of Permafrost and Ground Ice in the Northern Hemisphere. Polar Geog. 24(2): 126-131.( View Details | Bibtex)

2. Brown, J., O.J. Ferrians, Jr., J.A. Heginbottom, and E.S. Melnikov.. 2002. Circum-Arctic Map of Permafrost and Ground-Ice Conditions. Version 2. [indicate subset used]. Boulder, Colorado USA: National Snow and Ice Data Center.( View Details | Bibtex)

Using this data, the data citation is required to be referenced and the related literatures are suggested to be cited.

Copyright & License

To respect the intellectual property rights, protect the rights of data authors, expand services of the data center, and evaluate the application potential of data, data users should clearly indicate the source of the data and the author of the data in the research results generated by using the data (including published papers, articles, data products, and unpublished research reports, data products and other results). For re-posting (second or multiple releases) data, the author must also indicate the source of the original data.The results published in Chinese can be indicated by the following specifications: 数据来源于“黑河计划数据管理中心” (http://westdc.westgis.ac.cn)The results published in English can be indicated by the following specifications:The data set is provided by Cold and Arid Regions Sciences Data Center at Lanzhou (http://westdc.westgis.ac.cn)

License： This work is licensed under an Attribution 4.0 International (CC BY 4.0)