气候变化领域集成服务门户(CCPortal): Landform partitioning and estimates of deep storage of soil organic matter in Zackenberg, Greenland

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DOI	10.5194/tc-12-1735-2018
	Landform partitioning and estimates of deep storage of soil organic matter in Zackenberg, Greenland
	Palmtag J.; Cable S.; Christiansen H.H.; Hugelius G.; Kuhry P.
发表日期	2018
ISSN	19940416
卷号	12 期号:5
英文摘要	Soils in the northern high latitudes are a key component in the global carbon cycle, with potential feedback on climate. This study aims to improve the previous soil organic carbon (SOC) and total nitrogen (TN) storage estimates for the Zackenberg area (NE Greenland) that were based on a land cover classification (LCC) approach, by using geomorphological upscaling. In addition, novel organic carbon (OC) estimates for deeper alluvial and deltaic deposits (down to 300 cm depth) are presented. We hypothesise that landforms will better represent the long-term slope and depositional processes that result in deep SOC burial in this type of mountain permafrost environments. The updated mean SOC storage for the 0-100 cm soil depth is 4.8 kg C m-2, which is 42 % lower than the previous estimate of 8.3 kg C m-2 based on land cover upscaling. Similarly, the mean soil TN storage in the 0-100 cm depth decreased with 44 % from 0.50 kg (± 0.1 CI) to 0.28 (±0.1 CI) kg TN m-2. We ascribe the differences to a previous areal overestimate of SOC- and TN-rich vegetated land cover classes. The landform-based approach more correctly constrains the depositional areas in alluvial fans and deltas with high SOC and TN storage. These are also areas of deep carbon storage with an additional 2.4 kg C m-2 in the 100-300 cm depth interval. This research emphasises the need to consider geomorphology when assessing SOC pools in mountain permafrost landscapes. © 2018 Author(s).
学科领域	alluvial deposit; burial (geology); carbon cycle; carbon sequestration; deltaic deposit; estimation method; land cover; landform; latitude; mountain environment; partitioning; permafrost; soil depth; soil organic matter; Arctic; Greenland; Zackenberg
语种	英语
scopus关键词	alluvial deposit; burial (geology); carbon cycle; carbon sequestration; deltaic deposit; estimation method; land cover; landform; latitude; mountain environment; partitioning; permafrost; soil depth; soil organic matter; Arctic; Greenland; Zackenberg
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/119146
作者单位	Department of Physical Geography, Stockholm University, Stockholm, 106 91, Sweden; Center for Permafrost (CENPERM), Department of Geosciences and Natural Resource Management, University of Copenhagen, Copenhagen, 1350, Denmark; Arctic Geology Department, University Centre in Svalbard (UNIS), Longyearbyen, 9170, Norway
推荐引用方式 GB/T 7714	Palmtag J.,Cable S.,Christiansen H.H.,et al. Landform partitioning and estimates of deep storage of soil organic matter in Zackenberg, Greenland[J],2018,12(5).
APA	Palmtag J.,Cable S.,Christiansen H.H.,Hugelius G.,&Kuhry P..(2018).Landform partitioning and estimates of deep storage of soil organic matter in Zackenberg, Greenland.Cryosphere,12(5).
MLA	Palmtag J.,et al."Landform partitioning and estimates of deep storage of soil organic matter in Zackenberg, Greenland".Cryosphere 12.5(2018).