首页|Permafrost changes in the Nanwenghe Wetlands Reserve on the southern slope of the Da Xing'anling-Yile'huli mountains,Northeast China

Permafrost changes in the Nanwenghe Wetlands Reserve on the southern slope of the Da Xing'anling-Yile'huli mountains,Northeast China

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The Nanwenghe Wetlands Reserve in the Yile'huli Mountains is a representative region of the Xing'an permafrost.The response of permafrost to climate change remains unclear due to limited field investigations.Thus,longer-term responses of the ground thermal state to climate change since 2011 have been monitored at four sites with varied surface characteristics:Carex tato wetland(P1)and shrub-C.tato wetland(P2)with a multi-year average temperatures at the depth of zero annual amplitude(TZAA)of-0.52 and-1.19℃,respectively;Betula platyphylla-Larix gmelinii(Rupr.)Kuzen mixed forest(P3)with TZAA of 0.17℃,and;the forest of L.gmelinii(Rupr.)Kuzen(P4)with TZAA of 1.65℃.Continuous observations demonstrate that the ecosystem-protected Xing'an permafrost experienced a cooling under a warming climate.The temperature at the top of permafrost(TTOP)rose(1.8℃per decade)but the TZAA declined(-0.14℃per decade),while the active layer thickness(ALT)thinned from 0.9 m in 2012 to 0.8 m in 2014 at P1.Both the TTOP and TZAA increased(0.89 and 0.06℃per decade,respectively),but the ALT thinned from 1.4 m in 2012 to 0.7 m in 2016 at P2.Vertically detached permafrost at P3 disappeared in summer 2012,with warming rates of+0.42 and+0.17℃per decade for TTOP and TZAA,respectively.However,up to date,the ground thermal state has remained stable at P4.We conclude that the thermal offset is crucial for the preservation and persistence of the Xing'an permafrost at the southern fringe.

Nanwenghe wetland reservePermafrostClimate changeActive layer thicknessGround thermal stateThermal offsetLocal environmental factors

HE Rui-Xia、JIN Hui-Jun、LUO Dong-Liang、LI Xiao-Ying、ZHOU Chuan-Fang、JIA Ning、JIN Xiao-Ying、LI Xin-Yu、CHE Tao、YANG Xue、WANG Li-Zhong、LI Wei-Hai、WEI Chang-Lei、CHANG Xiao-Li、YU Shao-Peng

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State Key Laboratory of Frozen Soils Engineering and Da Xing'anling Observation and Research Station of Frozen-Ground Engineering and Environment,Northwest Institute of Eco-Environment and Resources,Chinese Academy of Sciences,Lanzhou,73000,China

Institute of Cold Regions Science and Engineering,School of Civil Engineering,Northeast-China Observatory and Research-Station of Permafrost Geo-Environment(Ministry of Education),and Northeast Forestry University,Harbin,150040,China

School of Geography and Tourism

Harbin Center for Natural Resources Survey,Geological Survey of China,Harbin,150086,China

School of Civil Engineering,Harbin Institute of Technology,Harbin,150090,China

China Forest Ecological Research Network(CFERN)Station at the Headwater Area of Nenjiang River Daxing'anling Institute of Agriculture and Forestry,Daxing'anling Forestry Group,Jagdaqi,165100,China

National-Local Joint Engineering Laboratory of Geo-Spatial Information Technology,Hunan University of Science and Technology,Xiangtan,411201,China

School of Geography and Tourism,Harbin University,Harbin,150086,China

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We thank the Editor and the two anonymous reviewers for constructive and detailed comments on the manuscriptThis study is financially supported by the program of National Natural Science Foundation of ChinaThis study is financially supported by the program of National Natural Science Foundation of ChinaThis study is financially supported by the program of National Natural Science Foundation of ChinaJoint Key Program of NSFC-Heilongjiang Province for Regional DevelopmentResearch Project of the State Key Laboratory of Frozen Soil EngineeringResearch Project of the State Key Laboratory of Frozen Soil Engineering

414010814187105241771074U20A2082SKLFSE-ZT-41SKLFSE-ZY-20

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(5)
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