DOI: 10.1175/JCLI-D-16-0531.1
Scopus记录号: 2-s2.0-85014035071
论文题名: Ocean-Atmosphere State Dependence of the Atmospheric Response to Arctic Sea Ice Loss
作者: Osborne J.M. ; Screen J.A. ; Collins M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 5 起始页码: 1537
结束页码: 1552
语种: 英语
Scopus关键词: Atmospheric temperature
; Climate change
; Earth atmosphere
; Ice
; Sea ice
; Surface waters
; Atlantic multidecadal oscillations
; Atmospheric general circulation models
; Atmospheric response
; Circulation anomalies
; Decadal timescale
; Meridional temperature gradient
; Northern Hemispheres
; Sea surface temperature anomalies
; Oceanography
; Atlantic Multidecadal Oscillation
; general circulation model
; global warming
; Northern Hemisphere
; prediction
; sea ice
; sea surface temperature
; temperature gradient
; Arctic Ocean
; North America
; Pacific Ocean
; Pacific Ocean (North)
英文摘要: The Arctic is warming faster than the global average. This disproportionate warming-known as Arctic amplification-has caused significant local changes to the Arctic system and more uncertain remote changes across the Northern Hemisphere midlatitudes. Here, an atmospheric general circulation model (AGCM) is used to test the sensitivity of the atmospheric and surface response to Arctic sea ice loss to the phase of the Atlantic multidecadal oscillation (AMO), which varies on (multi-) decadal time scales. Four experiments are performed, combining low and high sea ice states with global sea surface temperature (SST) anomalies associated with opposite phases of the AMO. A trough-ridge-trough response to wintertime sea ice loss is seen in the Pacific-North American sector in the negative phase of the AMO. The authors propose that this is a consequence of an increased meridional temperature gradient in response to sea ice loss, just south of the climatological maximum, in the midlatitudes of the central North Pacific. This causes a southward shift in the North Pacific storm track, which strengthens the Aleutian low with circulation anomalies propagating into North America. While the climate response to sea ice loss is sensitive to AMO-related SST anomalies in the North Pacific, there is little sensitivity to larger-magnitude SST anomalies in the North Atlantic. With background ocean-atmosphere states persisting for a number of years, there is the potential to improve predictions of the impacts of Arctic sea ice loss on decadal time scales. © 2017 American Meteorological Society. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49853
Appears in Collections: 气候变化事实与影响
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作者单位: College of Engineering, Mathematics and Physical Sciences, University of Exeter, Exeter, United Kingdom
Recommended Citation:
Osborne J.M.,Screen J.A.,Collins M.. Ocean-Atmosphere State Dependence of the Atmospheric Response to Arctic Sea Ice Loss[J]. Journal of Climate,2017-01-01,30(5)