DOI: 10.1175/JCLI-D-12-00813.1
Scopus记录号: 2-s2.0-84883165033
论文题名: The influence of the amundsen-bellingshausen seas low on the climate of West Antarctica and its representation in coupled climate model simulations
作者: Hosking J.S. ; Orr A. ; Marshall G.J. ; Turner J. ; Phillips T.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 17 起始页码: 6633
结束页码: 6648
语种: 英语
Scopus关键词: Antarctic climate
; Background pressure
; Coupled climate model
; Low pressure systems
; Mean sea level pressures
; Meteorological parameters
; Semiannual oscillations
; Southern Annular Mode
; Sea level
; Climate models
; atmosphere-ocean coupling
; climate forcing
; climate modeling
; low pressure system
; regional climate
; sea level pressure
; semiannual oscillation
; Amundsen Sea
; Antarctica
; Bellingshausen Sea
; Southern Ocean
; West Antarctica
英文摘要: In contrast to earlier studies, the authors describe the climatological deep low pressure system that exists over the South Pacific sector of the Southern Ocean, referred to as the Amundsen-Bellingshausen Seas low (ABSL), in terms of its relative (rather than actual) central pressure by removing the background areaaveraged mean sea level pressure (MSLP). Doing so removes much of the influence of large-scale variability across the ABSL sector region (e.g., due to the southern annular mode), allowing a clearer understanding of ABSL variability and its effect on the regional climate of West Antarctica. Using ECMWF Interim Re- Analysis (ERA-Interim) fields, the annual cycle of the relative central pressure of the ABSL for the period from 1979 to 2011 shows a minimum (maximum) during winter (summer), differing considerably from the earlier studies based on actual central pressure, which suggests a semiannual oscillation. The annual cycle of the longitudinal position of the ABSL is insensitive to the background pressure, and shows it shifting westward from ;2508 to ;2208E between summer and winter, in agreement with earlier studies. The authors demonstrate that ABSL variability, and in particular its longitudinal position, play an important role in controlling the surface climate of West Antarctica and the surrounding ocean by quantifying its influence on key meteorological parameters. Examination of the ABSL annual cycle in 17 CMIP5 climate models run with historical forcing shows that the majority of them have definite biases, especially in terms of longitudinal position, and a correspondingly poor representation of West Antarctic climate. © 2013 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51695
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: British Antarctic Survey, Natural Environment Research Council, Cambridge, United Kingdom
Recommended Citation:
Hosking J.S.,Orr A.,Marshall G.J.,et al. The influence of the amundsen-bellingshausen seas low on the climate of West Antarctica and its representation in coupled climate model simulations[J]. Journal of Climate,2013-01-01,26(17)