DOI: 10.1175/JCLI-D-13-00106.1
Scopus记录号: 2-s2.0-84890210444
论文题名: Interhemispheric influence of the northern summer monsoons on southern subtropical anticyclones
作者: Lee S.K. ; Mechoso C.R. ; Wang C. ; Neelin J.D.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 24 起始页码: 10193
结束页码: 10204
语种: 英语
Scopus关键词: Atmospheric general circulation models
; Hadley circulation
; Meridional overturning circulations
; Monsoons
; Southern Hemisphere
; Stationary waves
; Subtropical anticyclone
; Tropical convection
; Atmospheric pressure
; Atmospheric thermodynamics
; Experiments
; Mechanical waves
; Ocean currents
; Sea level
; Subsidence
; Tropics
; anticyclone
; atmospheric general circulation model
; Hadley cell
; monsoon
; Northern Hemisphere
; numerical model
; Rossby wave
; Southern Hemisphere
; standing wave
英文摘要: The southern subtropical anticyclones are notably stronger in austral winter than summer, particularly over the Atlantic and Indian Ocean basins. This is in contrast with the Northern Hemisphere (NH), in which subtropical anticyclones are more intense in summer according to the "monsoon heating" paradigm. To better understand the winter intensification of southern subtropical anticyclones, the present study explores the interhemispheric response to monsoon heating in theNHduring austral winter. Aspecially designed suite of numerical model experiments is performed in which summer monsoons in the NH are artificially weakened. These experiments are performed with both an atmospheric general circulation model and a simple two-layer model. The highlight of the findings presented here is that during the boreal summer enhanced tropical convection activity in the NH plays important roles in either maintaining or strengthening the southern subtropical anticyclones. Enhanced NH convection largely associated with the major summer monsoons produces subsidence over the equatorial oceans and the tropical Southern Hemisphere via interhemispheric meridional overturning circulations and increases the sea level pressure locally. In addition, suppressed convection over some regions of climatological subsidence produces stationary barotropic Rossby waves that propagate far beyond the tropics. These stationary barotropic Rossby waves and those forced directly by the summer heating in the NH are spatially phased to strengthen the southern subtropical anticyclones over all three oceans. The interhemispheric response to the NH summer monsoons is most dramatic in the South Pacific, where the subtropical anticyclone nearly disappears in the austral winter without the influence of the NH. © 2013 American Meteorological Society. 资助项目: NSF, National Science Foundation
; NOAA, National Oceanic and Atmospheric Administration
Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51506
Appears in Collections: 气候变化事实与影响
There are no files associated with this item.
作者单位: Cooperative Institute for Marine and Atmospheric Studies, University of Miami, Miami, FL, United States; Department of Atmospheric and Oceanic Sciences, University of California, Los Angeles, Los Angeles, CA, United States; NOAA/Atlantic Oceanographic and Meteorological Laboratory, Miami, FL, United States
Recommended Citation:
Lee S.K.,Mechoso C.R.,Wang C.,et al. Interhemispheric influence of the northern summer monsoons on southern subtropical anticyclones[J]. Journal of Climate,2013-01-01,26(24)