The deep permafrost carbon pool of the Yedoma region in Siberia and Alaska

被引：178

作者：

Strauss, Jens ^{[1
]}

Schirrmeister, Lutz ^{[1
]}

Grosse, Guido ^{[1
,2
]}

Wetterich, Sebastian ^{[1
]}

Ulrich, Mathias ^{[3
]}

Herzschuh, Ulrike ^{[1
]}

Hubberten, Hans-Wolfgang ^{[1
]}

机构：

[1] Alfred Wegener Inst Helmholtz, Ctr Polar & Marine Res, Periglacial Res Unit, DE-14473 Potsdam, Germany

[2] Univ Alaska Fairbanks, Inst Geophys, Fairbanks, AK 99775 USA

[3] Univ Leipzig, Inst Geophys, D-04109 Leipzig, Germany

来源：

GEOPHYSICAL RESEARCH LETTERS | 2013年 / 40卷 / 23期

基金：

美国国家科学基金会;

关键词：

carbon cycle; Yedoma; thermokarst; frozen organic matter; Arctic; climate feedback; RELEASE; THAW;

D O I：

10.1002/2013GL058088

中图分类号：

P [天文学、地球科学];

学科分类号：

07 ;

摘要：

Estimates for circumpolar permafrost organic carbon (OC) storage suggest that this pool contains twice the amount of current atmospheric carbon. The Yedoma region sequestered substantial quantities of OC and is unique because its deep OC, which was incorporated into permafrost during ice age conditions. Rapid inclusion of labile organic matter into permafrost halted decomposition and resulted in a deep long-term sink. We show that the deep frozen OC in the Yedoma region consists of two distinct major subreservoirs: Yedoma deposits (late Pleistocene ice- and organic-rich silty sediments) and deposits formed in thaw-lake basins (generalized as thermokarst deposits). We quantified the OC pool based on field data and extrapolation using geospatial data sets to 83+61/-57 Gt for Yedoma deposits and to 128+99/-96 Gt for thermokarst deposits. The total Yedoma region 211+160/-153 Gt is a substantial amount of thaw-vulnerable OC that must be accounted for in global models.

引用

页码：6165 / 6170

页数：6

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