DOI: 10.1175/JCLI-D-14-00284.1
Scopus记录号: 2-s2.0-84921695228
论文题名: The large-scale climate in response to the retreat of the West Antarctic ice sheet
作者: Justino F. ; Silva A.S. ; Pereira M.P. ; Stordal F. ; Lindemann D. ; Kucharski F.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2015
卷: 28, 期: 2 起始页码: 637
结束页码: 650
语种: 英语
Scopus关键词: Climatology
; Glacial geology
; Glaciers
; Isotopes
; Meteorology
; Antarctic Bottom Water
; Atmospheric circulation
; Marine isotope stages
; Meridional overturning circulations
; North Atlantic Deep Water
; Ocean drilling programs
; Southern Annular Mode
; West antarctic ice sheets
; Atmospheric movements
; Antarctic Bottom Water
; atmospheric circulation
; climate modeling
; ice sheet
; North Atlantic Deep Water
; Northern Hemisphere
; Ocean Drilling Program
; oceanic circulation
; orography
; westerly
; Antarctic Ice Sheet
; Antarctica
; Atlantic Ocean
; Atlantic Ocean (North)
; West Antarctic Ice Sheet
; West Antarctica
英文摘要: Based upon coupled climate simulations driven by present-day conditions and conditions resembling the Marine Isotope Stage 31 (this simulation is called WICE-EXP), insofar as the West Antarctic Ice Sheet (WAIS) configuration is concerned, it is demonstrated that changes in theWAIS orography lead to noticeable changes in the oceanic and atmospheric circulations. Comparedwith the present-day climate, WICE-EXP is characterized by warmer conditions in the Southern Hemisphere (SH) by up to 5°C in the polar oceans and up to 2°C in the Northern Hemisphere (NH). These changes feed back on the atmospheric circulation weakening (strengthening) the extratropicalwesterlies in the SH(northernAtlantic).Calculations of the southern annular mode (SAM) show that modification of theWAIS induces warmer conditionsandanorthwardshift of thewesterly flow; in particular, there is a clear weakening of the polar jet. These changes lead to modification of the rate of deep water formation, reducing the magnitude of the North Atlantic Deep Water but enhancing the Antarctic Bottom Water. By evaluating the density flux it is found that the thermal density flux has played amain role in the modification of the meridional overturning circulation. Moreover, the climate anomalies between the WICE-EXP and the presentday simulations resemble a bipolar seesaw pattern. These results are in good agreement with paleorecontructions in the framework of the Ocean Drilling Program and Antarctic Geological Drilling (ANDRILL) project. © 2015 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/50894
Appears in Collections: 气候变化事实与影响
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作者单位: Department of Agricultural Engineering, Universidade Federal de Viçosa, Viçosa, Brazil; Centre for Earth Evolution and Dynamics, Department of Geosciences, University of Oslo, Oslo, Norway; Abdus Salam International Centre for Theoretical Physics, Trieste, Italy
Recommended Citation:
Justino F.,Silva A.S.,Pereira M.P.,et al. The large-scale climate in response to the retreat of the West Antarctic ice sheet[J]. Journal of Climate,2015-01-01,28(2)