DOI: 10.1175/JCLI-D-16-0650.1
Scopus记录号: 2-s2.0-85019005941
论文题名: Changes in Northern Hemisphere winter storm tracks under the background of arctic amplification
作者: Wang J. ; Kim H.-M. ; Chang E.K.M.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2017
卷: 30, 期: 10 起始页码: 3705
结束页码: 3724
语种: 英语
Scopus关键词: Atmospheric pressure
; Energy conversion
; Energy dissipation
; Greenhouse gases
; Infrared radiation
; Modulation
; Nickel
; Analysis of simulations
; Arctic
; Climate variability
; Extratropical cyclones
; Inter-decadal variability
; Interdecadal changes
; Northern Hemispheres
; Surface air temperatures
; Storms
英文摘要: An interdecadal weakening in the North Atlantic storm track (NAST) and a poleward shift of the North Pacific storm track (NPST) are found during October-March for the period 1979-2015. A significant warming of surface air temperature (Ts) over northeastern North America and a La Niña-like change in the North Pacific under the background of Arctic amplification are found to be the contributors to the observed changes in the NAST and the NPST, respectively, via modulation of local baroclinicity. The interdecadal change in baroclinic energy conversion is consistent with changes in storm tracks with an energy loss from eddies to mean flow over the North Atlantic and an energy gain over the North Pacific. The analysis of simulations from the Community Earth System Model Large Ensemble project, although with some biases in storm-track and Ts simulations, supports the observed relationship between the NAST and Ts over northeastern North America, as well as the link between the NPST and El Niño-Southern Oscillation. The near-future projections of Ts and storm tracks are characterized by a warmer planet under the influence of increasing greenhouse gases and a significant weakening of both the NAST and the NPST. The potential role of the NAST in redistributing changes in Ts over the surrounding regions is also examined. The anomalous equatorward moisture flux associated with the weakening trend of the NAST would enhance the warming over its upstream region and hinder the warming over its downstream region via modulation of the downward infrared radiation. © 2017 American Meteorological Society. 资助项目: NSF, Norsk Sykepleierforbund
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49685
Appears in Collections: 气候变化事实与影响
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作者单位: School of Marine and Atmospheric Sciences, Stony Brook University, Stony Brook, NY, United States
Recommended Citation:
Wang J.,Kim H.-M.,Chang E.K.M.. Changes in Northern Hemisphere winter storm tracks under the background of arctic amplification[J]. Journal of Climate,2017-01-01,30(10)