DOI: 10.1175/JCLI-D-12-00373.1
Scopus记录号: 2-s2.0-84878968881
论文题名: Greenland ice sheet mass balance reconstruction. Part I: Net snow accumulation (1600-2009)
作者: Box J.E. ; Cressie N. ; Bromwich D.H. ; Jung J.-H. ; Van Den Broeke M. ; Van Angelen J.H. ; Forster R.R. ; Miège C. ; Mosley-Thompson E. ; Vinther B. ; Mcconnell J.R.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 11 起始页码: 3919
结束页码: 3934
语种: 英语
Scopus关键词: Atmospheric climate
; Greenland Ice Sheet
; Near surface air temperature
; North atlantic oscillation indices
; Northern Hemispheres
; Regional climate models
; Regression parameters
; Surface air temperatures
; Atmospheric temperature
; Climate models
; Snow
; Glaciers
; air temperature
; climate modeling
; glacier mass balance
; ice core
; ice sheet
; Little Ice Age
; North Atlantic Oscillation
; Northern Hemisphere
; paleoclimate
; parameterization
; reconstruction
; regression analysis
; sea surface temperature
; snow accumulation
; Arctic
; Greenland
; Greenland Ice Sheet
英文摘要: Ice core data are combined with Regional Atmospheric Climate Model version 2 (RACMO2) output (1958-2010) to develop a reconstruction of Greenland ice sheet net snow accumulation rate, Ât(G), spanning the years 1600-2009. Regression parameters from regional climate model (RCM) output regressed on 86 ice cores are used with available cores in a given year resulting in the reconstructed values. Each core site's residual variance is used to inversely weight the cores' respective contributions. The interannual amplitude of the reconstructed accumulation rate is damped by the regressions and is thus calibrated to match that of the RCM data. Uncertainty and significance of changes is measured using statistical models.A 12% or 86 Gt yr-1s increase in ice sheet accumulation rate is found from the end of the Little Ice Age in ~1840 to the last decade of the reconstruction. This 1840-1996 trend is 30% higher than that of 1600-2009, suggesting an accelerating accumulation rate. The correlation of Ât(G) with the average surface air temperature in the Northern Hemisphere (SATNHt) remains positive through time, while the correlation of Ât(G) with local near-surface air temperatures or North Atlantic sea surface temperatures is inconsistent, suggesting a hemispheric-scale climate connection. An annual sensitivity of Ât(G) to SATNHt of 6.8%K21 or 51 Gt K-1 is found. The reconstuction, Ât(G), correlates consistently highly with the North Atlantic Oscillation index. However, at the 11-yr time scale, the sign of this correlation flips four times in the 1870-2005 period. ©2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51829
Appears in Collections: 气候变化事实与影响
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作者单位: Byrd Polar Research Center, Department of Geography, The Ohio State University, Columbus, OH, United States; Department of Statistics, The Ohio State University, Columbus, OH, United States; National Institute for Applied Statistics Research Australia, University of Wollongong, Wollongong, NSW, Australia; Institute of Marine and Atmospheric Research, Utrecht University, Utrecht, Netherlands; Department of Geography, University of Utah, Salt Lake City, UT, United States; Centre for Ice and Climate, Niels Bohr Institute, Copenhagen, Denmark; Desert Research Institute, Reno, NV, United States
Recommended Citation:
Box J.E.,Cressie N.,Bromwich D.H.,et al. Greenland ice sheet mass balance reconstruction. Part I: Net snow accumulation (1600-2009)[J]. Journal of Climate,2013-01-01,26(11)