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Permafrost change in Northeast China in the 1950s-2010s

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  • 国家科技期刊平台
  • NETL
  • NSTL
  • 万方数据
  • 维普
Permafrost in Northeast China is highly sensitive to climate warming.Permafrost degradation significantly affects forest and vegetation ecosystems,as well as the safety of engineering projects and other man-made infrastructures.However,the permafrost change in the region is still unclear.This study uses metrological data from 258 weather stations,alongside reanalysis data,and other environmental data to investigate permafrost degradation and its related environmental impacts in Northeast China from the 1950s to 2010s.Results show that the total permafrost area decreased from 4.8×105 to 3.1×105 km2 from the 1950s to the 2010s.The southern limit of permafrost moved 0.1-1.1° northward,and its average elevation rose 160.5 m.During the study period,the degradation of predominantly continuous permafrost,and discontinuous and island permafrost was more pronounced than that of sparsely island permafrost.The south boundary of those three permafrost zones northward by 0-3.4°,0-5.5° and 0.4-1.1°,the average altitude raised by 339.2 m,208.3 m,67.1 m.The permafrost degradation shows the elevation and latitude zonality.Permafrost degradation is mainly caused by the rising of surface temperatures and the impacts of other environmental factors.The snowfall warming the ground of 1.1-10.2℃in cold seasons and rainfall cooling on surface conditions in warm seasons,those may result in temporal and spatial differences in permafrost degradation.However,there are lack of researches in the impact of environment factors on soil temperatures,moisture and permafrost degradation.

Northeast ChinaClimate warmingPermafrost degradationImpact of environmental factors

ZHANG Zhong-Qiong、WU Qing-Bai、HOU Mei-Ting、TAI Bo-Wen、AN Yu-Ke

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State Key Laboratory of Frozen Soils Engineering,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Science,Lanzhou,730000,China

China Meteorological Administration Training Centre,Beijing,100081,China

Gansu Province Transportation Planning,Survey&Design Institute Limited Liability Company,Lanzhou,730000,China

National Natural Science Foundation of ChinaNational Natural Science Foundation of Chinafoun-dation for excellent youth scholars of Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sci-ences

4177107441690144FEYS2019002

2021

气候变化研究进展(英文版)
国家气候中心

气候变化研究进展(英文版)

CSCDSCI
影响因子：0.806
ISSN：1674-9278
年,卷(期)：2021.12(1)
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