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DOI | 10.1007/s00382-017-3697-7 |
Interdecadal variation of tropical cyclone genesis and its relationship to the convective activities over the central Pacific | |
Huangfu, Jingliang; Huang, Ronghui; Chen, Wen | |
2018-02-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 50页码:1439-1450 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | Using the outgoing longwave radiation (OLR) data from the National Oceanic and Atmospheric Administration archives, this paper analyzes the interdecadal variation of convective activities over the central Pacific (CP) from July to October of 1979-2013 and its impact on tropical cyclone (TC) genesis in the western North Pacific (WNP). Concurrent with the interdecadal decrease of TC genesis, the tropical convection underwent a significant interdecadal change in the late 1990s. Overall, the first leading empirical orthogonal function mode of the tropical OLR during July-October turned from a zonal dipole pattern during 1979-1997 to a tripole pattern during 1998-2013. Concomitant to this change, the boreal part of the Walker circulation shrank westward, with its downdraft branch located over the CP. The downward motion anomalies over the CP increased after the late 1990s, as did the trade easterlies. Consistent with the CP convective activity anomalies, the negative low-level relative vorticity anomalies and upper-level divergence anomalies, positive vertical wind shear anomalies and anomalous abundant water vapor can be observed over the southeastern part of the WNP. Additionally, the tropical depression (TD)-type waves associated with the CP convective activities are significantly different before and after the late 1990s. Before the late 1990s, the off-equatorial TD-type waves could be distinctly observed, with clear transitions located along the WNP monsoon trough. However, these transitions were vague after the late 1990s. Therefore, the convective activities over the CP may have played an important role in affecting the interdecadal change of TC genesis by affecting the genesis of TD-type waves. |
英文关键词 | Tropical cyclone genesis Interdecadal variation Convective activities Central Pacific |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000425328700042 |
WOS关键词 | WESTERN NORTH PACIFIC ; COUPLED EQUATORIAL WAVES ; ASIAN SUMMER MONSOON ; DECADAL CHANGES ; INTERANNUAL VARIABILITY ; LATE 1990S ; PART II ; CYCLOGENESIS ; CLIMATE ; TEMPERATURE |
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/35573 |
专题 | 气候变化 |
作者单位 | Chinese Acad Sci, Inst Atmospher Phys, Ctr Monsoon Syst Res, POB 2718, Beijing 100190, Peoples R China |
推荐引用方式 GB/T 7714 | Huangfu, Jingliang,Huang, Ronghui,Chen, Wen. Interdecadal variation of tropical cyclone genesis and its relationship to the convective activities over the central Pacific[J]. CLIMATE DYNAMICS,2018,50:1439-1450. |
APA | Huangfu, Jingliang,Huang, Ronghui,&Chen, Wen.(2018).Interdecadal variation of tropical cyclone genesis and its relationship to the convective activities over the central Pacific.CLIMATE DYNAMICS,50,1439-1450. |
MLA | Huangfu, Jingliang,et al."Interdecadal variation of tropical cyclone genesis and its relationship to the convective activities over the central Pacific".CLIMATE DYNAMICS 50(2018):1439-1450. |
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