DOI: 10.1002/2015GL065544
论文题名: Extreme wind-ice interaction over Recovery Ice Stream, East Antarctica
作者: Das I. ; Scambos T.A. ; Koenig L.S. ; Van Den Broeke M.R. ; Lenaerts J.T.M.
刊名: Geophysical Research Letters
ISSN: 0094-8539
EISSN: 1944-8270
出版年: 2015
卷: 42, 期: 19 起始页码: 8064
结束页码: 8071
语种: 英语
英文关键词: East Antarctica
; ice-atmosphere interaction
; surface mass balance
Scopus关键词: Ablation
; Catchments
; Glacial geology
; Recovery
; Runoff
; Snow
; Sublimation
; Surface topography
; Climate indicators
; East antarctica
; Ice interactions
; Ice stream catchments
; Katabatic winds
; Radio-echo sounding
; Surface mass balance
; Water equivalent
; Ice
; ablation
; atmosphere-ice-ocean system
; echo sounding
; environmental indicator
; extreme event
; firn
; ice stream
; katabatic flow
; mass balance
; scour
; snow accumulation
; wind forcing
; Antarctica
; East Antarctica
英文摘要: Surface snow accumulation over East Antarctica is an important climate indicator but a difficult parameter to constrain. Surface mass ablation dominates over persistent wind-scour zones as near-surface katabatic winds accelerate over locally steeper ice surface topography, and sublimate and redistribute snow. Here we quantify ablation rates and downwind redeposition of snow over wind-scour zones in the upper Recovery Ice Stream catchment. Airborne radio echo-soundings show a gradual ablation of ~16-18 m of firn, corresponding to ~200 years of accumulation, over these zones and ablation rates of ~54 kg m-2 a-1 (54 mm water equivalent a-1). We conclude that mass loss is dominated by sublimation and mass is transported downwind as water vapor, because snow redeposition downslope of the wind-scour zones constitutes only a small fraction (<10%) of the cumulative mass loss. Key Points Widespread wind-scour zones impact surface mass balance over Recovery Ice Stream catchment Radiostratigraphy shows gradual ablation of ~200 years of accumulation in East Antarctica The mass loss over the wind-scour zones is mostly by sublimation with little redeposition © 2015. American Geophysical Union. All Rights Reserved. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84946905878&doi=10.1002%2f2015GL065544&partnerID=40&md5=b21bd4922ec9e09de5c5d234b319176a
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/8155
Appears in Collections: 科学计划与规划 气候变化与战略
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作者单位: Lamont Doherty Earth Observatory, Columbia University, Palisades, NY, United States
Recommended Citation:
Das I.,Scambos T.A.,Koenig L.S.,et al. Extreme wind-ice interaction over Recovery Ice Stream, East Antarctica[J]. Geophysical Research Letters,2015-01-01,42(19).