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DOI | 10.1007/s00382-018-4363-4 |
Impact of the cross-tropopause wind shear on tropical cyclone genesis over the Western North Pacific in May | |
Huangfu, Jingliang1; Chen, Wen1,2; Jian, Maoqiu3; Huang, Ronghui1,2 | |
2019-04-01 | |
发表期刊 | CLIMATE DYNAMICS
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ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2019 |
卷号 | 52页码:3845-3855 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | The role of the 50- to 200-hPa zonal wind shear in modulating tropical cyclone (TC) genesis over the western North Pacific (WNP) in May is investigated in this study. Concurrent with the strong cross-tropopause shear over the key region (0 degrees-5 degrees N, 160 degrees-180 degrees E), suppressed convection was observed over the tropical WNP, especially over the South China Sea and the Philippines. The monsoon trough (MT) was confined westward. However, enhanced convection occurred in the weak shear years and the MT extended eastward. This cross-tropopause wind shear is negatively correlated with TC genesis in May, with a decreased (increased) number of TCs corresponding to strong (weak) cross-tropopause wind shear.This cross-tropopause wind shear can be treated as the combined impacts of the El Nino-Southern Oscillation (ENSO) events and the stratospheric quasi-biennial oscillation (QBO). When decaying El Nino events coupled with the easterly phase of the QBO were noted, the cross-tropopause wind shear was stronger with weakened convection, and an enhanced western Pacific subtropical high was observed. TCs are rarely generated during these years. In contrast, the modulation of the QBO westerly phase on decaying La Nina events is limited. Affected by the QBO westerly phase, TC genesis in the May following La Nina events is only slightly enhanced. The energy analysis indicates that the combined impacts of the decaying El Nino events and the QBO easterly phase might suppress the barotropic eddy kinetic energy conversion in May, whereas the decaying La Nina events and the QBO west phase act in an opposite manner. |
英文关键词 | Cross-tropopause wind shear Quasi-biennial oscillation ENSO event Tropical cyclone genesis Western North Pacific |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000467187600005 |
WOS关键词 | SEA SUMMER MONSOON ; EL-NINO ; CLIMATE ; ONSET |
WOS类目 | Meteorology & Atmospheric Sciences |
WOS研究方向 | Meteorology & Atmospheric Sciences |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/181875 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Sci, Inst Atmospher Phys, Ctr Monsoon Syst Res, POB 2718, Beijing 100190, Peoples R China; 2.Univ Chinese Acad Sci, Coll Earth Sci, Beijing 100049, Peoples R China; 3.Sun Yat Sen Univ, Sch Atmospher Sci, Guangzhou, Guangdong, Peoples R China |
推荐引用方式 GB/T 7714 | Huangfu, Jingliang,Chen, Wen,Jian, Maoqiu,et al. Impact of the cross-tropopause wind shear on tropical cyclone genesis over the Western North Pacific in May[J]. CLIMATE DYNAMICS,2019,52:3845-3855. |
APA | Huangfu, Jingliang,Chen, Wen,Jian, Maoqiu,&Huang, Ronghui.(2019).Impact of the cross-tropopause wind shear on tropical cyclone genesis over the Western North Pacific in May.CLIMATE DYNAMICS,52,3845-3855. |
MLA | Huangfu, Jingliang,et al."Impact of the cross-tropopause wind shear on tropical cyclone genesis over the Western North Pacific in May".CLIMATE DYNAMICS 52(2019):3845-3855. |
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