DOI: 10.1007/s00382-017-3828-1
Scopus记录号: 2-s2.0-85026469148
论文题名: Model bias for South Atlantic Antarctic intermediate water in CMIP5
作者: Zhu C. ; Liu Z. ; Gu S.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-09-10 起始页码: 3613
结束页码: 3624
语种: 英语
英文关键词: Antarctic intermediate water
; Atlantic meridional overturning circulation freshwater transport
; Inter-basin exchange
; Model bias
; North Atlantic
; Surface climate
Scopus关键词: climate modeling
; CMIP
; intermediate water
; meridional circulation
; overturn
; Atlantic Ocean
; Atlantic Ocean (North)
英文摘要: Characterized by a salinity minimum in the mid-depth, the Antarctic Intermediate Water (AAIW) is an important component of global ocean water mass. The simulation of the AAIW in current climate models, however, has remained deficient, especially in the Atlantic sector. Here, we evaluate the simulation of the South Atlantic AAIW in eleven state-of-the-art coupled climate models. It is found that all the models show a common AAIW bias relative to the observation, with a saltier, warmer and lighter core located at a shallower depth. This AAIW bias seems to contribute to a deficient freshwater export by the Atlantic Meridional Overturning Circulation (AMOC), potentially overstabilizing the AMOC. The causes of the bias are investigated in sensitivity experiments using an ocean alone model. It is found that the AAIW bias is caused neither by the surface climate bias nor the North Atlantic bias, although is weakly affected by the inter-basin exchange. This left the conclusion that the AAIW bias is caused predominantly by the deficient model representation of ocean dynamics and mixing processes in the AAIW region. © 2017, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109314
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: Laboratory for Climate and Ocean-Atmosphere Studies(LaCOAS), School of Physics, Peking University, Beijing, 100871, China; Department of Atmospheric and Oceanic Sciences and Nelson Center for Climatic Research, University of Wisconsin-Madison, 1225 W. Dayton St., Madison, WI 53706, United States
Recommended Citation:
Zhu C.,Liu Z.,Gu S.. Model bias for South Atlantic Antarctic intermediate water in CMIP5[J]. Climate Dynamics,2018-01-01,50(2018-09-10)