Modulation of Low-Latitude West Wind on Abnormal Track and Intensity of Tropical Cyclone Nargis (2008) in the Bay of Bengal
Li, WW; Wang, CZ; Wang, DX; Yang, L; Deng, Y; dxwang@scsio.ac.cn
2012
发表期刊ADVANCES IN ATMOSPHERIC SCIENCES
ISSN0256-1530
卷号29期号:2页码:407-421
摘要Tropical cyclone (TC) Nargis (2008) made landfall in Myanmar on 02 May 2008, bringing a storm surge, major flooding, and resulting in a significant death toll. TC Nargis (2008) displayed abnormal features, including rare eastward motion in its late stage, rapid intensification before landing. Using reanalysis data and a numerical model, we investigated how a low-latitude westerly wind modulated TC Nargis' (2008) track and provided favorable atmospheric conditions for its rapid intensification. More importantly, we found a possible counterbalance effect of flows from the two hemispheres on the TC track in the Bay of Bengal. Our analysis indicates that a strong westerly wind burst across the Bay of Bengal, resulting in TC Nargis' (2008) eastward movement after its recurvature. This sudden enhancement of westerly wind was mainly due to the rapidly intensified mid-level cross-equatorial flow. Our results show that a high-pressure system in the Southern Hemisphere induced this strong, mid-level, cross-equatorial flow. During the rapid intensification period of TC Nargis (2008), this strong and broad westerly wind also transported a large amount of water vapor to TC Nargis (2008). Sufficient water vapor gave rise to continuously high and increased mid-level relative humidity, which was favorable to TC Nargis' (2008) intensification. Condensation of water vapor increased the energy supply, which eventuated the intensification of TC Nargis (2008) to a category 4 on the Saffir-Simpson scale.
部门归属[Li Wei-Wei; Wang Dongxiao; Yang Lei; Deng Yi] Chinese Acad Sci, State Key Lab Trop Oceanog, S China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China; [Wang Chunzai] NOAA, Atlantic Oceanog & Meteorol Lab, Miami, FL 33149 USA
关键词Tc Nargis (2008) Tropical Cyclone Westerly Wind Cross-equatorial Flow Bay Of Bengal
学科领域Meteorology & Atmospheric Sciences
语种英语
资助项目LTO
WOS记录号WOS:000300530700017
引用统计
被引频次:5[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.scsio.ac.cn/handle/344004/10205
专题热带海洋环境国家重点实验室(LTO)
通讯作者dxwang@scsio.ac.cn
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GB/T 7714
Li, WW,Wang, CZ,Wang, DX,et al. Modulation of Low-Latitude West Wind on Abnormal Track and Intensity of Tropical Cyclone Nargis (2008) in the Bay of Bengal[J]. ADVANCES IN ATMOSPHERIC SCIENCES,2012,29(2):407-421.
APA Li, WW,Wang, CZ,Wang, DX,Yang, L,Deng, Y,&dxwang@scsio.ac.cn.(2012).Modulation of Low-Latitude West Wind on Abnormal Track and Intensity of Tropical Cyclone Nargis (2008) in the Bay of Bengal.ADVANCES IN ATMOSPHERIC SCIENCES,29(2),407-421.
MLA Li, WW,et al."Modulation of Low-Latitude West Wind on Abnormal Track and Intensity of Tropical Cyclone Nargis (2008) in the Bay of Bengal".ADVANCES IN ATMOSPHERIC SCIENCES 29.2(2012):407-421.
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