DOI: 10.1002/jgrd.50666
论文题名: Is there a linkage between the tropical cyclone activity in the southern Indian Ocean and the Antarctic Oscillation?
作者: Mao R. ; Gong D.-Y. ; Yang J. ; Zhang Z.-Y. ; Kim S.-J. ; He H.-Z.
刊名: Journal of Geophysical Research Atmospheres
ISSN: 21698996
出版年: 2013
卷: 118, 期: 15 起始页码: 8519
结束页码: 8535
语种: 英语
英文关键词: Antarctic Oscillation
; austral summer
; southern Indian Ocean
; tropical cyclone
Scopus关键词: Computer simulation
; Hurricanes
; Oceanography
; Antarctic oscillation
; Austral summers
; Community climate system model
; Coupled Model Intercomparison Project
; Rank correlation coefficient
; Southern indian ocean
; Tropical cyclone
; Tropical cyclone activity
; Climate models
; annual variation
; Antarctic Oscillation
; climate modeling
; relative humidity
; tropical cyclone
; water vapor
; Indian Ocean
; Indian Ocean (South)
英文摘要: In this article, the relationship between the Antarctic Oscillation (AAO) and the tropical cyclone (TC) activity in the southern Indian Ocean (SIO) was examined. It was found that on the interannual time scale, the AAO is well linked with the TC activity in the SIO during TC season (December-March). The rank correlation coefficient between the AAO index and the TC frequency (TCF) in the SIO is 0.37, which is significant at the 95% confidence level. When the AAO is in a positive phase, TC passage in the northwestern coast of Australia (100E°-120°E and 10°S-30°S) increases by approximately 50%-100% from the climatology. The increase in the TC passage is primarily the result of more frequent TCs originating in this region due to enhanced water vapor convergence and ascending motions, which are caused by a cyclonic height anomaly over the western coast of Australia associated with the positive AAO phases. In addition, the AAO-height covariations, which are essential to the formation of the AAO-TC links in the SIO, were investigated through a historical climate simulation using the Community Climate System Model 4 from the Coupled Model Intercomparison Project Phase 5. The AAO-height links were well reproduced in the simulation. The similarity in the AAO-height links between the observation and the simulation supports the physical robustness of the AAO-TC links in the SIO. Key Points The AAO is linked with tropical cyclone (TC) in the southern Indian Ocean (SIO) The AAO-TC links are due to an enhanced relative humidity in the SIO A cyclonic height anomaly over the SIO caused the enhanced relative humidity ©2013. American Geophysical Union. All Rights Reserved. 资助项目: 41101075
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/63454
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: State Key Laboratory of Earth Surface Processes and Resource Ecology, Beijing Normal University, Beijing 100875, China; Beijing Meteorological Bureau, Beijing, China; Korea Polar Research Institute, Incheon, South Korea; Academy of Disaster Reduction and Emergency Management, Ministry of Civil Affairs, Beijing Normal University, Beijing, China
Recommended Citation:
Mao R.,Gong D.-Y.,Yang J.,et al. Is there a linkage between the tropical cyclone activity in the southern Indian Ocean and the Antarctic Oscillation?[J]. Journal of Geophysical Research Atmospheres,2013-01-01,118(15)