气候变化领域集成服务门户(CCPortal): Low below-ground organic carbon storage in a subarctic Alpine permafrost environment

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DOI	10.5194/tc-9-427-2015
	Low below-ground organic carbon storage in a subarctic Alpine permafrost environment
	Fuchs M.; Kuhry P.; Hugelius G.
发表日期	2015
ISSN	19940416
卷号	9 期号:2
英文摘要	This study investigates the soil organic carbon (SOC) storage in Tarfala Valley, northern Sweden. Field inventories, upscaled based on land cover, show that this alpine permafrost environment does not store large amounts of SOC, with an estimate mean of 0.9 ± 0.2 kg C m-2 for the upper meter of soil. This is 1 to 2 orders of magnitude lower than what has been reported for lowland permafrost terrain. The SOC storage varies for different land cover classes and ranges from 0.05 kg C m-2 for stone-dominated to 8.4 kg C m-2 for grass-dominated areas. No signs of organic matter burial through cryoturbation or slope processes were found, and radiocarbon-dated SOC is generally of recent origin (<2000 cal yr BP). An inventory of permafrost distribution in Tarfala Valley, based on the bottom temperature of snow measurements and a logistic regression model, showed that at an altitude where permafrost is probable the SOC storage is very low. In the high-altitude permafrost zones (above 1500 m), soils store only ca. 0.1 kg C m-2. Under future climate warming, an upward shift of vegetation zones may lead to a net ecosystem C uptake from increased biomass and soil development. As a consequence, alpine permafrost environments could act as a net carbon sink in the future, as there is no loss of older or deeper SOC from thawing permafrost. © Author(s) 2015.
学科领域	alpine environment; biological uptake; carbon sink; numerical model; permafrost; radiocarbon dating; soil organic matter; temperature effect; terrain; thawing; vegetation structure; Norrbotten; Sweden; Tarfala Valley
语种	英语
scopus关键词	alpine environment; biological uptake; carbon sink; numerical model; permafrost; radiocarbon dating; soil organic matter; temperature effect; terrain; thawing; vegetation structure; Norrbotten; Sweden; Tarfala Valley
来源期刊	Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/119948
作者单位	Department of Physical Geography, Stockholm University, Stockholm, 106 91, Sweden; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Telegrafenberg A43, Potsdam, 14473, Germany
推荐引用方式 GB/T 7714	Fuchs M.,Kuhry P.,Hugelius G.. Low below-ground organic carbon storage in a subarctic Alpine permafrost environment[J],2015,9(2).
APA	Fuchs M.,Kuhry P.,&Hugelius G..(2015).Low below-ground organic carbon storage in a subarctic Alpine permafrost environment.Cryosphere,9(2).
MLA	Fuchs M.,et al."Low below-ground organic carbon storage in a subarctic Alpine permafrost environment".Cryosphere 9.2(2015).