DOI: 10.5194/tc-9-465-2015
Scopus记录号: 2-s2.0-84924202577
论文题名: Geophysical mapping of palsa peatland permafrost
作者: Sjöberg Y ; , Marklund P ; , Pettersson R ; , Lyon S ; W
刊名: Cryosphere
ISSN: 19940416
出版年: 2015
卷: 9, 期: 2 起始页码: 465
结束页码: 478
语种: 英语
英文关键词: cryosphere
; electrical resistivity
; geophysical method
; ground penetrating radar
; mapping
; peatland
; permafrost
; spatial distribution
; thawing
; Sweden
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. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75331
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, Bolin Centre for Climate Research, Stockholm University, Stockholm, Sweden; Department of Earth Sciences, Uppsala University, Uppsala, Sweden
Recommended Citation:
Sjöberg Y,, Marklund P,, Pettersson R,et al. Geophysical mapping of palsa peatland permafrost[J]. Cryosphere,2015-01-01,9(2)