气候变化领域集成服务门户(CCPortal): Geophysical mapping of palsa peatland permafrost

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DOI	10.5194/tc-9-465-2015
	Geophysical mapping of palsa peatland permafrost
	Sjöberg Y.; Marklund P.; Pettersson R.; Lyon S.W.
发表日期	2015
ISSN	19940416
卷号	9 期号:2
英文摘要	Permafrost peatlands are hydrological and biogeochemical hotspots in the discontinuous permafrost zone. Non-intrusive geophysical methods offer a possibility to map current permafrost spatial distributions in these environments. In this study, we estimate the depths to the permafrost table and base across a peatland in northern Sweden, using ground penetrating radar and electrical resistivity tomography. Seasonal thaw frost tables (at ∼0.5 m depth), taliks (2.1-6.7 m deep), and the permafrost base (at ∼16 m depth) could be detected. Higher occurrences of taliks were discovered at locations with a lower relative height of permafrost landforms, which is indicative of lower ground ice content at these locations. These results highlight the added value of combining geophysical techniques for assessing spatial distributions of permafrost within the rapidly changing sporadic permafrost zone. For example, based on a back-of-the-envelope calculation for the site considered here, we estimated that the permafrost could thaw completely within the next 3 centuries. Thus there is a clear need to benchmark current permafrost distributions and characteristics, particularly in under studied regions of the pan-Arctic. © Author(s) 2015.
学科领域	cryosphere; electrical resistivity; geophysical method; ground penetrating radar; mapping; peatland; permafrost; spatial distribution; thawing; Sweden
语种	英语
scopus关键词	cryosphere; electrical resistivity; geophysical method; ground penetrating radar; mapping; peatland; permafrost; spatial distribution; thawing; Sweden
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/119945
作者单位	Department of Physical Geography, Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden; Department of Earth Sciences, Uppsala University, Uppsala, Sweden
推荐引用方式 GB/T 7714	Sjöberg Y.,Marklund P.,Pettersson R.,et al. Geophysical mapping of palsa peatland permafrost[J],2015,9(2).
APA	Sjöberg Y.,Marklund P.,Pettersson R.,&Lyon S.W..(2015).Geophysical mapping of palsa peatland permafrost.Cryosphere,9(2).
MLA	Sjöberg Y.,et al."Geophysical mapping of palsa peatland permafrost".Cryosphere 9.2(2015).