DOI: 10.1175/JCLI-D-13-00134.1
Scopus记录号: 2-s2.0-84890190882
论文题名: ENSO-modulated cyclogenesis over the Bay of Bengal
作者: Felton C.S. ; Subrahmanyam B. ; Murty V.S.N.
刊名: Journal of Climate
ISSN: 8948755
出版年: 2013
卷: 26, 期: 24 起始页码: 9806
结束页码: 9818
语种: 英语
Scopus关键词: Atmosphere-ocean interactions
; Cyclogenesis/cyclolysis
; EL Nino
; Precipitable water
; Sea surface temperature anomalies
; Tropical cyclogenesis
; Tropical cyclone activity
; Vertical wind shear
; Atmospheric pressure
; Climate change
; Hurricanes
; Modulation
; Moisture
; Oceanography
; air-sea interaction
; atmospheric transport
; cyclogenesis
; El Nino-Southern Oscillation
; La Nina
; moisture transfer
; precipitable water
; relative humidity
; sea surface temperature
; temperature anomaly
; tropical cyclone
; vorticity
; wind shear
; zonal wind
; Bay of Bengal
; Indian Ocean
英文摘要: The role of the El Niño-Southern Oscillation (ENSO) on the modulation of tropical cyclone activity over the Bay of Bengal (BoB) for the 1979-2011 period is examined. It is shown that Niño-3.4 sea surface temperature (SST) anomalies are negatively correlated with the BoB tropical cyclone activity to a statistically significant percentage by a lead time of 5 months. Composites of 10-m zonal winds exhibit greater variance during La Niña events, favoring the development of low-level cyclonic vorticity. Low vertical wind shear over the central and northern BoB also aids in the development of tropical cyclones during La Niña events. Increased relative humidity is the result of enhanced moisture transport and higher precipitable water under La Niña conditions. Furthermore, storm-relative composites of relative humidity show stronger moisture pulses over the BoB during La Niña. The enhanced moisture associated with tropical cyclogenesis likely aids in the development and strengthening of the systems. ENSO forces modulations in oceanic conditions as well. The observed negative (positive) SST anomalies during La Niña (El Niño) could be seen as the result of increased (decreased) net heat flux across the sea surface. Tropical cyclone activity varies between El Niño and La Niña as a result of anomalous wind and moisture patterns during each ENSO phase. © 2013 American Meteorological Society. 资助项目: ONR, Office of Naval Research
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/51513
Appears in Collections: 气候变化事实与影响
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作者单位: Marine Science Program, University of South Carolina, Columbia, SC, United States; Department of Earth and Ocean Sciences, University of South Carolina, Columbia, SC, United States; Council of Scientific and Industrial Research, National Institute of Oceanography Regional Center, Visakhapatnam, India
Recommended Citation:
Felton C.S.,Subrahmanyam B.,Murty V.S.N.. ENSO-modulated cyclogenesis over the Bay of Bengal[J]. Journal of Climate,2013-01-01,26(24)