DOI: 10.1007/s00382-011-1188-9
Scopus记录号: 2-s2.0-84863010169
论文题名: Interdecadal changes in the storm track activity over the North Pacific and North Atlantic
作者: Lee S.-S. ; Lee J.-Y. ; Wang B. ; Ha K.-J. ; Heo K.-Y. ; Jin F.-F. ; Straus D.M. ; Shukla J.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2012
卷: 39, 期: 2017-01-02 起始页码: 313
结束页码: 327
语种: 英语
英文关键词: Barotropic and baroclinic energetics
; Climate change
; Interdecadal shift
; Mean flow-eddy interaction
; Storm track
英文摘要: Analysis of NCEP-NCAR I reanalysis data of 1948-2009 and ECMWF ERA-40 reanalysis data of 1958-2001 reveals several significant interdecadal changes in the storm track activity and mean flow-transient eddy interaction in the extratropics of Northern Hemisphere. First, the most remarkable transition in the North Pacific storm track (PST) and the North Atlantic storm track (AST) activities during the boreal cold season (from November to March) occurred around early-to-mid 1970s with the characteristics of global intensification that has been noticed in previous studies. Second, the PST activity in midwinter underwent decadal change from a weak regime in the early 1980s to a strong regime in the late 1980s. Third, during recent decade, the PST intensity has been enhanced in early spring whereas the AST intensity has been weakened in midwinter. Finally, interdecadal change has been also noted in the relationship between the PST and AST activities and between the storm track activity and climate indices. The variability of storm track activity is well correlated with the Pacific Decadal Oscillation and North Atlantic Oscillation prior to the early 1980s, but this relationship has disappeared afterward and a significant linkage between the PST and AST activity has also been decoupled. For a better understanding of the mid-1970s' shift in storm track activity and mean flow-transient eddy interaction, further investigation is made by analyzing local barotropic and baroclinic energetics. The intensification of global storm track activity after the mid-1970s is mainly associated with the enhancement of mean meridional temperature gradient resulting in favorable condition for baroclinic eddy growth. Consistent with the change in storm track activity, the baroclinic energy conversion is significantly increased in the North Pacific and North Atlantic. The intensification of the PST and AST activity, in turn, helps to reinforce the changes in the middle-to-upper tropospheric circulation but acts to interfere with the changes in the low-tropospheric temperature field. © 2011 Springer-Verlag. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/55259
Appears in Collections: 过去全球变化的重建
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作者单位: Division of Earth Environmental System, Pusan National University, Busan, South Korea; Department of Meteorology and International Pacific Research Center, University of Hawaii, Honolulu, HI, United States; George Mason University, Fairfax, VA, United States; Center for Ocean-Land-Atmosphere Studies, Calverton, MD, United States
Recommended Citation:
Lee S.-S.,Lee J.-Y.,Wang B.,et al. Interdecadal changes in the storm track activity over the North Pacific and North Atlantic[J]. Climate Dynamics,2012-01-01,39(2017-01-02)