DOI: 10.1007/s00382-015-2826-4
Scopus记录号: 2-s2.0-84940858209
论文题名: Strong modulations on the Bay of Bengal monsoon onset vortex by the first northward-propagating intra-seasonal oscillation
作者: Li K. ; Li Z. ; Yang Y. ; Xiang B. ; Liu Y. ; Yu W.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2016
卷: 47, 期: 2017-01-02 起始页码: 107
结束页码: 115
语种: 英语
英文关键词: Bay of Bengal
; Genesis potential index
; Intra-seasonal oscillation
; Monsoon onset vortex
; Tropical cyclone
英文摘要: Monsoon onset vortex (OV) in the form of tropical cyclone is often observed in the pre-monsoon period and contributes to the subsequent abrupt establishment of summer monsoon over the Bay of Bengal (BoB). It is identified here that all historical OVs occurred during the convection-enhanced phase of the first northward-propagating intra-seasonal oscillation (FNISO). The individual contributions from the four large scale environmental fields associated with the intra-seasonal variations to the cyclone genesis are diagnosed with the aid of the genesis potential index. The significant moistening of mid-level atmosphere, which is embedded in the FNISO convection-enhanced phase, is shown to be the primary factor leading to the cyclone genesis. The water vapor budget analysis is further done to understand the governing process for the mid-level humidity increase. It is clearly seen that the vertical advection process, dominated by the anomalous vertical advection of the mean vertical water vapor gradient, plays the critical role. Hence the OVs are shown to be strongly modulated by FNISOs, both of which are important elements of the complex story of the BoB monsoon onset. © 2015, The Author(s). Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/53647
Appears in Collections: 过去全球变化的重建
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作者单位: Institute of Oceanology, Chinese Academy of Sciences, Qingdao, China; Center for Ocean and Climate Research, First Institute of Oceanography, SOA, Qingdao, China; University of the Chinese Academy of Sciences, Beijing, China; NOAA/Geophysical Fluid Dynamics Laboratory, Princeton, NJ, United States; University Corporation for Atmospheric Research, Boulder, CO, United States
Recommended Citation:
Li K.,Li Z.,Yang Y.,et al. Strong modulations on the Bay of Bengal monsoon onset vortex by the first northward-propagating intra-seasonal oscillation[J]. Climate Dynamics,2016-01-01,47(2017-01-02)