DOI: 10.5194/tc-7-1901-2013
Scopus记录号: 2-s2.0-84890544884
论文题名: Constraining grace-derived cryosphere-attributed signal to irregularly shaped ice-covered areas
作者: Colgan W ; , Luthcke S ; , Abdalati W ; , Citterio M
刊名: Cryosphere
ISSN: 19940416
出版年: 2013
卷: 7, 期: 6 起始页码: 1901
结束页码: 1914
语种: 英语
英文关键词: cryosphere
; GRACE
; ice cap
; ice cover
; ice sheet
; Monte Carlo analysis
; Arctic
; Greenland
英文摘要: We use a Monte Carlo approach to invert a spherical harmonic representation of cryosphere-attributed mass change in order to infer the most likely underlying mass changes within irregularly shaped ice-covered areas at nominal 26 km resolution. By inverting a spherical harmonic representation through the incorporation of additional fractional ice coverage information, this approach seeks to eliminate signal leakage between non-ice-covered and ice-covered areas. The spherical harmonic representation suggests a Greenland mass loss of 251 ± 25 Gt a-1 over the December 2003 to December 2010 period. The inversion suggests 218 ± 20 Gt a-1 was due to the ice sheet proper, and 34 ± 5 Gt a-1 (or ∼14%) was due to Greenland peripheral glaciers and ice caps (GrPGICs). This mass loss from GrPGICs exceeds that inferred from all ice masses on both Ellesmere and Devon islands combined. This partition therefore highlights that GRACE-derived "Greenland" mass loss cannot be taken as synonymous with "Greenland ice sheet" mass loss when making comparisons with estimates of ice sheet mass balance derived from techniques that sample only the ice sheet proper. © 2013 Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/74914
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: Cooperative Institute for Research in Environmental Sciences, University of Colorado, Boulder, CO, United States; Geological Survey of Denmark and Greenland, Copenhagen, Denmark; Goddard Space Flight Center, National Aeronautics and Space Administration, Greenbelt, MD, United States
Recommended Citation:
Colgan W,, Luthcke S,, Abdalati W,et al. Constraining grace-derived cryosphere-attributed signal to irregularly shaped ice-covered areas[J]. Cryosphere,2013-01-01,7(6)