TY  - Data
T1  - State map of permafrost and ground ice around the Arctic (China part) 1:1 million dataset (1990s)
A1  - Wu lizong
DO  - 10.12072/ncdc.westdc.db3871.2023
PY  - 2021
DA  - 2021-01-11
PB  - National Cryosphere Desert Data Center
AB  - 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 ChinaField 1: num_ Code permafrost codeData type: text (4)Field 2: combo attribute abbreviationData type: text (4)Field 3: definition attributeData type: text (254)
DB  - NCDC
UR  - http://www.ncdc.ac.cn/portal/metadata/480ff59a-58f8-497c-abc1-27b048784169
ER  -