气候变化领域集成服务门户(CCPortal): Gravity effect of glacial ablation in the Eastern Alps

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DOI	10.5194/tc-7-491-2013
	Gravity effect of glacial ablation in the Eastern Alps - Observation and modeling
	Arneitz P.; Meurers B.; Ruess D.; Ullrich C.; Abermann J.; Kuhn M.
发表日期	2013
ISSN	19940416
卷号	7 期号:2
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).
学科领域	ablation; cryosphere; displacement; geodynamics; glacial erosion; gravity field; ice thickness; Postglacial; snow cover; topographic mapping; uplift; Alps; Eastern Alps
语种	英语
scopus关键词	ablation; cryosphere; displacement; geodynamics; glacial erosion; gravity field; ice thickness; Postglacial; snow cover; topographic mapping; uplift; Alps; Eastern Alps
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/120296
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
推荐引用方式 GB/T 7714	Arneitz P.,Meurers B.,Ruess D.,et al. Gravity effect of glacial ablation in the Eastern Alps - Observation and modeling[J],2013,7(2).
APA	Arneitz P.,Meurers B.,Ruess D.,Ullrich C.,Abermann J.,&Kuhn M..(2013).Gravity effect of glacial ablation in the Eastern Alps – Observation and modeling.Cryosphere,7(2).
MLA	Arneitz P.,et al."Gravity effect of glacial ablation in the Eastern Alps – Observation and modeling".Cryosphere 7.2(2013).