The data set includes:
1. Permaice (frozen soil type map)
2. Subsea (vector map of submarine boundary)
3. Tree line
4. Nhipa (grid map)
5. Llipa (grid chart)
Permaice includes attribute fields:
Num_ Code (permafrost attribute code)
< pcombo (permafrost attribute)
Extend < / P
Content (ice content)
Attribute comparison is as follows:
(1) Comparison table of frozen soil properties:
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) Comparison table of frozen soil range
c = continuous (90-100%)
d = discontinuous (50- 90%)
s = sporadic (10- 50%)
i = isolated patches ( 0 - 10%)
(3) Comparison table of ice content
h = high (>20% for "f" landform codes) (>10% for "r" landform codes)
m = medium (10-20%)
l = low (0-10%)
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
Digital Vectorization
Data set quality control through strict manual audit
This work is licensed under
CC BY 4.0 (Creative Commons Attribution 4.0 International License).
CSTR:11738.11.ncdc.Westdc.2020.567
10.12072/ncdc.westdc.db3757.2023
