DOI: 10.1175/JCLI-D-15-0502.1
Scopus记录号: 2-s2.0-84974779323
论文题名: The influence of the Madden-Julian oscillation on Northern Hemisphere winter blocking
作者: Henderson S.A. ; Maloney E.D. ; Barnes E.A.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2016
卷: 29, 期: 12 起始页码: 4597
结束页码: 4616
语种: 英语
Scopus关键词: Atmospheric pressure
; Mechanical waves
; Atmospheric blocking
; Blocking
; Enhanced convection
; Extreme weather conditions
; Madden-Julian oscillation
; North Atlantic oscillations
; Northern Hemispheres
; Teleconnections
; Climatology
; air-sea interaction
; atmospheric blocking
; atmospheric circulation
; Madden-Julian oscillation
; North Atlantic Oscillation
; Northern Hemisphere
; Rossby wave
; teleconnection
; wave breaking
; winter
; Indian Ocean
; Indian Ocean (East)
英文摘要: The persistent and quasi-stationary nature of atmospheric blocking is associated with long-lasting extreme weather conditions that influence much of the Northern Hemisphere during boreal winter. The Madden-Julian oscillation (MJO) has been previously shown to influence important factors for blocking, including Rossby wave breaking and the North Atlantic Oscillation (NAO). However, the extent to which the MJO influences blocking across the Northern Hemisphere is not yet fully understood. Utilizing a two-dimensional blocking index, composites of North Pacific, North Atlantic, and European blocking are generated relative to MJO phase. In the west and central Pacific, all MJO phases demonstrate significant changes in blocking, particularly at high latitudes. A significant decrease in east Pacific and Atlantic blocking occurs following phase 3 of the MJO, characterized by enhanced convection over the tropical East Indian Ocean and suppressed convection in the west Pacific. The opposite-signed MJO heating during phase 7 is followed by a significant increase in east Pacific and Atlantic blocking. A significant decrease in European blocking follows MJO phase 4, with an increase after phase 6. The phase 6 European blocking is hypothesized to result from two preexisting conditions: 1) an anomalous anticyclone over the Atlantic and 2) a preceding negative Pacific-North American (PNA) pattern initialized and influenced by MJO heating. © 2016 American Meteorological Society. 资助项目: CSU, Colorado State University
; NSF, National Science Foundation
; NSF, National Science Foundation
; NSF, National Science Foundation
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/49923
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Atmospheric Science, Colorado State University, Fort Collins, CO, United States
Recommended Citation:
Henderson S.A.,Maloney E.D.,Barnes E.A.. The influence of the Madden-Julian oscillation on Northern Hemisphere winter blocking[J]. Journal of Climate,2016-01-01,29(12)