DOI: 10.5194/tc-7-491-2013
Scopus记录号: 2-s2.0-84875703514
论文题名: Gravity effect of glacial ablation in the Eastern Alps – Observation and modeling
作者: Arneitz P ; , Meurers B ; , Ruess D ; , Ullrich C ; , Abermann J ; , Kuhn M
刊名: Cryosphere
ISSN: 19940416
出版年: 2013
卷: 7, 期: 2 起始页码: 491
结束页码: 498
语种: 英语
英文关键词: ablation
; cryosphere
; displacement
; geodynamics
; glacial erosion
; gravity field
; ice thickness
; Postglacial
; snow cover
; topographic mapping
; uplift
; Alps
; Eastern Alps
英文摘要: Absolute gravity measurements have been regularly performed in the Austrian Eastern Alps since 1985. A gravity increase of 300 nm s-2 has been observed so far. The gravity trend is explained by ablation effects within surrounding glaciers. Ice thickness changes derived from 3 successive glacier inventories of 1969, 1997 and 2006 are used for quantitative 3-D modeling based on rectangular prisms with basis areas of ≤ 8 m × 8 m. Local topographic changes due to man-made mass displacements close to the measuring site are modeled by a polyhedron approach. Two-thirds (2/3) of the observed gravity increase can be explained by the ablation model response and man-made effects. A positive trend of about 100 nm s-2 remains. The origin of the residual trend remains open. Correcting for geodynamical processes like Alpine uplift or postglacial deformation is expected to cause a slight increase of this trend. The observed gravity signal shows seasonal gravity variations as well, which are probably due to snow cover effects but cannot be quantified due to the lack of appropriate snow cover information. © 2013 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/74986
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: University of Vienna, Department of Meteorology and Geophysics, Vienna, Austria; Federal Office of Metrology and Surveying, Vienna, Austria; Austrian Academy of Sciences, Commission for Geophysical Research, Vienna, Austria; University of Innsbruck, Institute of Meteorology and Geophysics, Innsbruck, Austria; Centro de Estudios Avanzado en Zonas Áridas (CEAZA), La Serena, Chile
Recommended Citation:
Arneitz P,, Meurers B,, Ruess D,et al. Gravity effect of glacial ablation in the Eastern Alps – Observation and modeling[J]. Cryosphere,2013-01-01,7(2)