DOI: 10.1002/jgrd.50875
论文题名: Surface mass balance on Fimbul ice shelf, East Antarctica: Comparison of field measurements and large-scale studies
作者: Sinisalo A. ; Anschütz H. ; Langley K. ; Von Deschwanden A. ; Kohler J. ; Matsuoka K. ; Hamran S.-E. ; Øyan M.-J. ; Schlosser E. ; Hagen J.O. ; Nøst O.A. ; Isaksson E.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 20 起始页码: 11625
结束页码: 11635
语种: 英语
英文关键词: Antarctica
; ground penetrating radar
; ice shelf
; in situ data
; surface mass balance
Scopus关键词: Climate change
; Geological surveys
; Glacial geology
; Ground penetrating radar systems
; Remote sensing
; Sea level
; Uncertainty analysis
; Antarctica
; Ground Penetrating Radar
; Ice shelves
; In-situ data
; Surface mass balance
; Ice
; annual variation
; atmospheric modeling
; climate modeling
; comparative study
; fieldwork
; ground penetrating radar
; ground-based measurement
; ice sheet
; ice shelf
; in situ measurement
; mass balance
; regional climate
; remote sensing
; sea level change
; uncertainty analysis
; Antarctica
; East Antarctica
; Fimbul Ice Shelf
英文摘要: Many challenges remain for estimating the Antarctic ice sheet surface mass balance (SMB), which represents a major uncertainty in predictions of future sea-level rise. Validating continental scale studies is hampered by the sparse distribution of in situ data. Here we present a 26 year mean SMB of the Fimbul ice shelf in East Antarctica between 1983-2009, and recent interannual variability since 2010. We compare these data to the results of large-scale SMB studies for similar time periods, obtained from regional atmospheric modeling and remote sensing. Our in situ data include ground penetrating radar, firn cores, and mass balance stakes and provide information on both temporal and spatial scales. The 26 year mean SMB on the Fimbul ice shelf varies between 170 and 620 kg m-2 a-1 giving a regional average value of 310 ± 70 kg m-2 a-1. Our measurements indicate higher long-term accumulation over large parts of the ice shelf compared to the large-scale studies. We also show that the variability of the mean annual SMB, which can be up to 90%, can be a dominant factor in short-term estimates. The results emphasize the importance of using a combination of ground-based validation data, regional climate models, and remote sensing over a relevant time period in order to achieve a reliable SMB for Antarctica. Key Points New in situ data of surface mass balance of an Antarctic ice shelf Combination of ground based methods Results are compared with data from remote sensing and atmospheric modeling ©2013. American Geophysical Union. All Rights Reserved. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63226
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: Department of Geosciences, University of Oslo, PO Box 1047, Blindern, Oslo 0316, Norway; Norwegian Geotechnical Institute, Oslo, Norway; Norwegian Polar Institute, Tromsø, Norway; Norwegian Defence Research Establishment, Kjeller, Norway; Institute of Meteorology and Geophysics, University of Innsbruck, Austria; Akvaplan-niva, Tromsø, Norway
Recommended Citation:
Sinisalo A.,Anschütz H.,Langley K.,et al. Surface mass balance on Fimbul ice shelf, East Antarctica: Comparison of field measurements and large-scale studies[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(20)