DOI: 10.5194/tc-11-17-2017
Scopus记录号: 2-s2.0-85008869178
论文题名: Climate change threatens archaeologically significant ice patches: Insights into their age, internal structure, mass balance and climate sensitivity
作者: Strand Ødegärd R ; , Nesje A ; , Isaksen K ; , Marie Andreassen L ; , Eiken T ; , Schwikowski M ; , Uglietti C
刊名: Cryosphere
ISSN: 19940416
出版年: 2017
卷: 11, 期: 1 起始页码: 17
结束页码: 32
语种: 英语
英文关键词: aerosol
; age determination
; archaeology
; climate change
; field method
; Holocene
; ice cover
; mass balance
; meltwater
; Mesolithic
; microstructure
; moss
; organic matter
; precipitation (climatology)
; sensitivity analysis
; snow accumulation
; snowpack
; Jotunheimen
; Norway
; Bryophyta
英文摘要: Despite numerous spectacular archaeological discoveries worldwide related to melting ice patches and the emerging field of glacial archaeology, governing processes related to ice patch development during the Holocene and their sensitivity to climate change are still largely unexplored. Here we present new results from an extensive 6-year (2009-2015) field experiment at the Juvfonne ice patch in Jotunheimen in central southern Norway. Our results show that the ice patch has existed continuously since the late Mesolithic period. Organic-rich layers and carbonaceous aerosols embedded in clear ice show ages spanning from modern at the surface to ca. 7600 cal years BP at the bottom. This is the oldest dating of ice in mainland Norway. The expanding ice patch covered moss mats appearing along the margin of Juvfonne about 2000 years ago. During the study period, the mass balance record showed a strong negative balance, and the annual balance is highly asymmetric over short distances. Snow accumulation is poorly correlated with estimated winter precipitation, and single storm events may contribute significantly to the total winter balance. Snow accumulation is approx. 20 % higher in the frontal area compared to the upper central part of the ice patch. There is sufficient meltwater to bring the permeable snowpack to an isothermal state within a few weeks in early summer. Below the seasonal snowpack, ice temperatures are between-2 and-4°C. Juvfonne has clear ice stratification of isochronic origin. © 2017 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75626
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: Norwegian University of Science and Technology, Gjøvik, Norway; University of Bergen, Bergen, Norway; Norwegian Meteorological Institute, Oslo, Norway; Norwegian Water Resources and Energy Direc., Oslo, Norway; Department of Geosciences, University of Oslo, Oslo, Norway; Paul Scherrer Institute, Villigen, Switzerland
Recommended Citation:
Strand Ødegärd R,, Nesje A,, Isaksen K,et al. Climate change threatens archaeologically significant ice patches: Insights into their age, internal structure, mass balance and climate sensitivity[J]. Cryosphere,2017-01-01,11(1)