A regime shift between soil moisture and temperature in the 1950s over the permafrost region of Northeast China
A regime shift between soil moisture and temperature in the 1950s over the permafrost region of Northeast China
Permafrost is one of the essential carbon pools in the world.Due to limited studies on historical soil moisture changes and the coupling relationship between soil mois?ture and temperature in permafrost regions,significant uncertainty exists in the car?bon loss in permafrost predicted by different models under global warming scenarios.Based on the tree-ring width chronology of Pinus sylvestris var.mongholica Litv.grow?ing in the southern edge of the Eurasian continuous permafrost zone,we recon?structed the summer(June-September)0-1 m soil moisture variations from 1705 to 2009,which could explain 45.6%of the variance in the observed soil moisture.Over?all,local precipitation and temperature exhibited statistically significant positive feed?back(p＜0.001)to soil moisture before the 1950s,indicating that the warm/humid climate pattern was conducive to soil moisture conservation before the Anthropo?cene Epoch.However,the effect of temperature on soil moisture has shifted sud?denly to negative si
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Institute of Global Environmental Change,Xi'an Jiaotong University,Xi'an,China;State Key Laboratory of Loess and Quaternary Geology,Institute of Earth Environment,Chinese Academy of Sciences,Xi'an,China;School of Human Settlements and Civil Engin();
global warming regime shift soil moisture reconstruction the Anthropocene epoch tree rings
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