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

引用

Advances in Climate Change Research 2021年第5期12卷 696-709页

作者： 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 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 ResourcesChinese Academy of SciencesLanzhou73000China Institute of Cold Regions Science and Engineering School of Civil EngineeringNortheast-China Observatory and Research-Station of Permafrost Geo-Environment(Ministry of Education)and Northeast Forestry UniversityHarbin150040China School of Geography and Tourism Harbin UniversityHarbin150086China Harbin Center for Natural Resources Survey Geological Survey of ChinaHarbin150086China School of Civil Engineering Harbin Institute of TechnologyHarbin150090China China Forest Ecological Research Network(CFERN)Station at the Headwater Area of Nenjiang River Daxing'anling Institute of Agriculture and ForestryDaxing'anling Forestry GroupJagdaqi165100China National-local Joint Engineering Laboratory of Geo-Spatial Information Technology Hunan University of Science and TechnologyXiangtan411201China

The Nanwenghe Wetlands Reserve in the Yile'huli Mountains is a representative region of the Xing'an *** response of permafrost to climate change remains unclear due to limited field ***,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 *** wetland(P2)with a multi-year average temperatures at the depth of zero annual amplitude(T_(ZAA))of−0.52 and−1.19℃,respectively;Betula platyphylla-Larix gmelinii(Rupr.)Kuzen mixed forest(P3)with T_(ZAA) of 0.17℃,and;the forest of ***(Rupr.)Kuzen(P4)with T_(ZAA) of 1.65℃.Continuous observations demonstrate that the ecosystem-protected Xing'an permafrost experienced a cooling under a warming *** 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 *** 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 *** detached permafrost at P3 disappeared in summer 2012,with warming rates of+0.42 and+0.17℃ per decade for TTOP and T_(ZAA),***,up to date,the ground thermal state has remained stable at *** conclude that the thermal offset is crucial for the preservation and persistence of the Xing'an permafrost at the southern fringe.

关键词： Nanwenghe wetland reserve Permafrost Climate change Active layer thickness Ground thermal state Thermal offset local environmental factors

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