DOI: 10.1007/s00382-017-3643-8
Scopus记录号: 2-s2.0-85019685407
论文题名: Predecessor rain events over China’s low-latitude highlands associated with Bay of Bengal tropical cyclones
作者: Yuan J. ; Zhao D. ; Yang R. ; Yang H.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-03-04 起始页码: 825
结束页码: 843
语种: 英语
Scopus关键词: frontogenesis
; moisture transfer
; precipitation intensity
; pressure gradient
; rainfall
; tropical cyclone
; upland region
; Bay of Bengal
; China
; Indian Ocean
; Pacific Ocean
; Pacific Ocean (West)
英文摘要: A predecessor rain event (PRE) is defined as organized heavy rainfall that occurs far ahead of tropical cyclone (TC), yet directly associated with the deep tropical moisture originating from the TC vicinity. The PREs occurring over China’s low-latitude highlands (CLLH) in association with Bay of Bengal TCs were investigated from 1981 to 2012. Results indicate that about 19% of Bay of Bengal TCs produces PRE. The PREs frequently occur when TCs are active in the northern Bay of Bengal with northeastward paths. The PREs are more likely to appear in the pre-monsoon and post-monsoon seasons, with peaks in May and October, respectively. The median lifetime of the PREs was approximately two days. The distances between PREs and parent TCs are ranged from 745 to 1849 km, with a median distance of 1118 km. Composite results of PREs suggested that deep moisture is advected from the TC vicinity to the remote CLLH region, which is situated beneath the equatorward entrance of the upper-level East Asia subtropical jet (EASJ). The lower-level southwesterly flow, which is associated with a strong pressure gradient between the western Pacific subtropical high and a trough in Bay of Bengal, steers TCs conveying abundant moisture from the Bay of Bengal to the CLLH region. The enhancement of the ascent and frontogenesis within the equatorward entrance region of the EASJ is favorable for occurrence of PREs in CLLH. TCs may also have a dynamical role in occurrence of PREs by intensifying the upper-level EASJ. © 2017, Springer-Verlag Berlin Heidelberg. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109460
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
There are no files associated with this item.
作者单位: Department of Atmospheric Sciences, Yunnan University, Kunming, 650091, China; Key Laboratory of Meteorological Disaster of Ministry of Education, Nanjing University of Information Science and Technology, Nanjing, China; Meteorological Bureau of Honghe County in Yunnan province, Honghe, China
Recommended Citation:
Yuan J.,Zhao D.,Yang R.,et al. Predecessor rain events over China’s low-latitude highlands associated with Bay of Bengal tropical cyclones[J]. Climate Dynamics,2018-01-01,50(2018-03-04)