DOI: 10.1175/JCLI-D-15-0908.1
Scopus记录号: 2-s2.0-85018942995
论文题名: Responses of basal melting of antarctic ice shelves to the climatic forcing of the last glacial maximum and CO2 doubling
作者: Obase T. ; Abe-Ouchi A. ; Kusahara K. ; Hasumi H. ; Ohgaito R.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 10 起始页码: 3473
结束页码: 3497
语种: 英语
Scopus关键词: Carbon dioxide
; Glacial geology
; Glaciers
; Heat flux
; Ice
; Melting
; Oceanography
; Sea ice
; Antarctica
; Ice sheet
; Ice shelves
; Paleoclimates
; Southern ocean
; Climate change
英文摘要: Basal melting of the Antarctic ice shelves is an important factor in determining the stability of the Antarctic ice sheet. This study used the climatic outputs of an atmosphere-ocean general circulation model to force a circumpolar ocean model that resolves ice shelf cavity circulation to investigate the response of Antarctic ice shelf melting to different climatic conditions (i.e., to a doubling of CO2 and to the Last Glacial Maximum conditions). Sensitivity experiments were also conducted to investigate the roles of both surface atmospheric change and changes of oceanic lateral boundary conditions. It was found that the rate of change of basal melt due to climate warming is much greater (by an order of magnitude) than that due to cooling. This is mainly because the intrusion of warm water onto the continental shelves, linked to sea ice production and climate change, is crucial in determining the basal melt rate of many ice shelves. Sensitivity experiments showed that changes of atmospheric heat flux and ocean temperature are both important for warm and cold climates. The offshore wind change, together with atmospheric heat flux change, strongly affected the production of both sea ice and high-density water, preventing warmer water approaching the ice shelves under a colder climate. These results reflect the importance of both water mass formation in the Antarctic shelf seas and subsurface ocean temperature in understanding the long-term response to climate change of the melting of Antarctic ice shelves. © 2017 American Meteorological Society. 资助项目: JSPS, Japan Society for the Promotion of Science
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49704
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Atmosphere and Ocean Research Institute, University of Tokyo, Kashiwa, Japan; Japan Agency for Marine-Earth Science and Technology, Yokohama, Japan; Antarctic Climate and Ecosystems Cooperative Research Centre, University of Tasmania, Hobart, TAS, Australia
Recommended Citation:
Obase T.,Abe-Ouchi A.,Kusahara K.,et al. Responses of basal melting of antarctic ice shelves to the climatic forcing of the last glacial maximum and CO2 doubling[J]. Journal of Climate,2017-01-01,30(10)