An interdecadal change of tropical cyclone activity in the South China Sea in the early 1990s
Yang, L; Du, Y; Xie, SP; Wang, DX; duyan@scsio.ac.cn
2012
发表期刊CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY
ISSN0254-4059
卷号30期号:6页码:953-959
摘要Tropical cyclone (TC) genesis in the South China Sea (SCS) during 1979-2008 underwent a decadal variation around 1993. A total of 55 TCs formed in the SCS from May to September during 1994-2008, about twice that during 1979-1993 (27). During the TC peak season (July-September, JAS), there were 43 TCs from 1994-2008, but only 17 during 1979-1993. For July in particular, 13 TCs formed from 1994-2008, but there were none during 1979-1993. The change in TC number is associated with changes of key environmental conditions in atmosphere and ocean. Compared to 1979-1993, the subtropical high was significantly weaker and was displaced more eastward during 1994-2008. In the former period, a stronger subtropical high induced downward flow, inhibiting TC formation. In the latter period, vertical wind shear and outgoing longwave radiation all weakened. Mid-level (850-500 hPa) humidity, and relative vorticity were higher. Sea surface temperature and upper layer heat content were also higher in the area. All these factors favor TC genesis during the latter period. The decadal change of TC genesis led to more landfalling TCs in Southern China during the period 1994-2008, which contributed to an abrupt increase in regional rainfall.
部门归属[Yang Lei; Du Yan; Wang Dongxiao] Chinese Acad Sci, State Key Lab Trop Oceanog, S China Sea Inst Oceanol, Guangzhou 510301, Guangdong, Peoples R China; [Xie Shangping] Univ Hawaii Manoa, Int Pacific Res Ctr, Honolulu, HI 96822 USA; [Xie Shangping] Univ Hawaii Manoa, Dept Meteorol, Honolulu, HI 96822 USA; [Xie Shangping] Ocean Univ China, Key Lab Phys Oceanog, Minist Educ, Qingdao 266003, Peoples R China
关键词Tropical Cyclone South China Sea Decadal Change Cyclonic Circulation
学科领域Limnology ; Oceanography
语种英语
资助项目LTO
WOS记录号WOS:000311286500006
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被引频次:7[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/344004/10057
专题热带海洋环境国家重点实验室(LTO)
通讯作者duyan@scsio.ac.cn
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Yang, L,Du, Y,Xie, SP,et al. An interdecadal change of tropical cyclone activity in the South China Sea in the early 1990s[J]. CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,2012,30(6):953-959.
APA Yang, L,Du, Y,Xie, SP,Wang, DX,&duyan@scsio.ac.cn.(2012).An interdecadal change of tropical cyclone activity in the South China Sea in the early 1990s.CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY,30(6),953-959.
MLA Yang, L,et al."An interdecadal change of tropical cyclone activity in the South China Sea in the early 1990s".CHINESE JOURNAL OF OCEANOLOGY AND LIMNOLOGY 30.6(2012):953-959.
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