The distribution map of permafrost and ground ice around the Arctic is the only international permafrost data map compiled by the international Permafrost Association in 1997 in association with permafrost research institutions of many countries. The permafrost map describes the distribution and properties of permafrost in the northern hemisphere (20 ° n to 90 ° n) and the conditions of underground ice.
Permafrost can be divided into continuous (90-100%), discontinuous (50-90%), sporadic (10-50%), Island (less than 10%) and no permafrost. The underground ice abundance of the top 20 meters is divided by the volume percentage of ice (greater than 20%, 10-20%, less than 10% and 0%)
Attribute fields of Permafrost Distribution Map in China
Field 1: num_ Code permafrost code Data type: text (4) Field 2: combo attribute abbreviation Data type: text (4) Field 3: definition attribute Data type: text (254)
Derived from a 1:10000000 paper map of permafrost and ground ice status around the Arctic (Brown et al. 1993)
Using GIS, ENVI and other remote sensing software, the required images and thematic maps are precisely corrected to ensure that the error of adjacent images is less than one pixel. Then, after digitization, spatial data and attribute data are extracted, sorted and edited in strict accordance with the response scale.
Based on the scanned maps of permafrost and ground ice conditions around the Arctic in the 1990s, together with field survey and sampling points
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CSTR:11738.11.ncdc.Westdc.2020.786
10.12072/ncdc.westdc.db3871.2023