globalchange  > 影响、适应和脆弱性
DOI: 10.5194/tc-12-1401-2018
Scopus记录号: 2-s2.0-85045549664
论文题名:
Accumulation patterns around Dome C, East Antarctica, in the last 73 kyr
作者: Cavitte M; G; P; , Parrenin F; , Ritz C; , Young A; , Van Liefferinge B; , Blankenship D; D; , Frezzotti M; , Roberts J; L
刊名: Cryosphere
ISSN: 19940416
出版年: 2018
卷: 12, 期:4
起始页码: 1401
结束页码: 1414
语种: 英语
英文关键词: accumulation rate ; advection ; flow modeling ; ice flow ; Last Glacial ; map ; pattern recognition ; precipitation (climatology) ; radar ; reconstruction ; wind direction ; Antarctica ; Dome Concordia ; East Antarctica
英文摘要: We reconstruct the pattern of surface accumulation in the region around Dome C, East Antarctica, since the last glacial. We use a set of 18 isochrones spanning all observable depths of the ice column, interpreted from various ice-penetrating radar surveys and a 1-D ice flow model to invert for accumulation rates in the region. The shallowest four isochrones are then used to calculate paleoaccumulation rates between isochrone pairs using a 1-D assumption where horizontal advection is negligible in the time interval of each layer. We observe that the large-scale (100sĝ€km) surface accumulation gradient is spatially stable through the last 73ĝ€kyr, which reflects current modeled and observed precipitation gradients in the region. We also observe small-scale (10ĝ€sĝ€km) accumulation variations linked to snow redistribution at the surface, due to changes in its slope and curvature in the prevailing wind direction that remain spatially stationary since the last glacial. © Author(s) 2018.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/75375
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: Institute for Geophysics, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, United States; Department of Geological Sciences, Jackson School of Geosciences, University of Texas at Austin, Austin, TX, United States; Univ. Grenoble Alpes, CNRS, IRD, Grenoble, France; Laboratoire de Glaciologie, Université Libre de Bruxelles, Avenue F. D. Roosevelt 50, Brussels, Belgium; ENEA, Agenzia Nazionale per le Nuove Tecnologie, l'energia e lo sviluppo sostenibile, Rome, Italy; Australian Antarctic Division, Kingston, TAS, Australia; Antarctic Climate and Ecosystems Cooperative Research Centre, University of Tasmania, Hobart, TAS, Australia

Recommended Citation:
Cavitte M,G,P,et al. Accumulation patterns around Dome C, East Antarctica, in the last 73 kyr[J]. Cryosphere,2018-01-01,12(4)
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