DOI: 10.5194/tc-9-427-2015
Scopus记录号: 2-s2.0-84923919500
论文题名: Low below-ground organic carbon storage in a subarctic Alpine permafrost environment
作者: Fuchs M ; , Kuhry P ; , Hugelius G
刊名: Cryosphere
ISSN: 19940416
出版年: 2015
卷: 9, 期: 2 起始页码: 427
结束页码: 438
语种: 英语
英文关键词: alpine environment
; biological uptake
; carbon sink
; numerical model
; permafrost
; radiocarbon dating
; soil organic matter
; temperature effect
; terrain
; thawing
; vegetation structure
; Norrbotten
; Sweden
; Tarfala Valley
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75333
Appears in Collections: 影响、适应和脆弱性 气候变化与战略
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作者单位: Department of Physical Geography, Stockholm University, Stockholm, Sweden; Alfred Wegener Institute Helmholtz Centre for Polar and Marine Research, Telegrafenberg A43, Potsdam, Germany
Recommended Citation:
Fuchs M,, Kuhry P,, Hugelius G. Low below-ground organic carbon storage in a subarctic Alpine permafrost environment[J]. Cryosphere,2015-01-01,9(2)