Permafrost dynamics in the north-east of European Russia at the end of the 20th century
Permafrost dynamics in the north-east of European Russia at the end of the 20th century
复制标题
20世纪末俄罗斯欧洲部分东北部的永久冻土动态
DOI：
10.1080/00291950152746595
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发表时间：
2001
期刊：
影响因子：
--
通讯作者：
G. Mazhitova
中科院分区：
文献类型：
--
作者：
N. Oberman;G. Mazhitova
1970年至1995年期间，在俄罗斯欧洲部分东北部的主要自然地理分区内，对cryolithozone和活跃/季节性冰冻层的温度进行了监测。活动层深度平均增加了11%至15%，而季节性冻结层的深度减少了19%至40%。最大的正温度增量，高达1.2摄氏度，是典型的皮埃蒙特和基底平原。湖泊冲积低地表现出相反的温度趋势，取决于地形。许多正在形成永久冻土的地点表现出从0.1 ℃到2.0 ℃的负温度增量。
In the major physiographic divisions of the north-east of European Russia, temperatures in the cryolithozone and the active/seasonally frozen layer were monitored during the period 1970 to 1995. Active layer depths increased on average by 11% to 15%, whereas the depths of the seasonally frozen layer decreased by 19% to 40%. The largest positive temperature increments, up to 1.2C, were characteristic for the piedmont and basement plains. Lacustrine-alluvial lowlands demonstrated oppositely directed temperature trends depending on a landform. Numerous sites with ongoing permafrost formation demonstrated negative temperature increments varying from 0.1C to 2.0C.