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DOI | 10.1007/s00382-017-3672-3 |
Effect of the atmospheric quasi-biweekly oscillation on the vortices moving off the Tibetan Plateau | |
Li, Lun1; Zhang, Renhe2,3; Wen, Min1; Lu, Junmei1 | |
2018-02-01 | |
发表期刊 | CLIMATE DYNAMICS |
ISSN | 0930-7575 |
EISSN | 1432-0894 |
出版年 | 2018 |
卷号 | 50页码:1193-1207 |
文章类型 | Article |
语种 | 英语 |
国家 | Peoples R China |
英文摘要 | In the present study, the relationship between the atmospheric quasi-biweekly oscillation (QBWO) and Tibetan Plateau vortices (TPVs) moving off the Tibetan Plateau was investigated based on the radiosonde and reanalysis data. It is found that the number of TPVs moving off the Tibetan Plateau (moving-off TPVs) has the distinct feature of the 10-20-day QBWO. 77% of the moving-off TPVs occur in the positive phases of the 10-20-day filtered 500 hPa vorticity over eastern Tibetan Plateau. Besides, distributions of the zonal and meridional components of E-vectors coincide well with the trajectories of TPVs, indicating the moving-off TPVs are well related with the propagation of the QBWO energy. The atmospheric circulations and related thermodynamic fields are discussed to reveal the mechanism of the effect of 10-20-day QBWO on the moving-off TPVs. It is found that the atmospheric circulations and heating fields of 10-20-day QBWO have major impact on the moving-off TPVs. In positive QBWO phases, at 500 hPa over eastern Tibetan Plateau, there appear negative geopotential height anomalies and anomalous cyclonic wind shear; the anomalous jet stream and positive geopotential heights at 200 hPa lying over the northeast of the Tibetan Plateau stretch eastward gradually, benefiting for the upper level divergence and ascending motion. The condensation latent heat is released and shifts eastward with the heating centers located at 400 hPa, which depresses the isobaric surface at 500 hPa. All these conditions are in favor of the maintenance and eastward movement of TPVs in the positive QBWO phases. |
英文关键词 | Tibetan Plateau vortices Quasi-biweekly oscillation Large scale circulations Condensation latent heat |
领域 | 气候变化 |
收录类别 | SCI-E |
WOS记录号 | WOS:000425328700027 |
WOS关键词 | WEATHER SYSTEMS ; WESTERLY JET ; SUMMER ; VORTEX ; MECHANISM ; RAINFALL ; MONSOON ; ASIA |
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/35814 |
专题 | 气候变化 |
作者单位 | 1.Chinese Acad Meteorol Sci, State Key Lab Severe Weather, Beijing, Peoples R China; 2.Fudan Univ, Inst Atmospher Sci, 220 Handan Rd, Shanghai 200433, Peoples R China; 3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China |
推荐引用方式 GB/T 7714 | Li, Lun,Zhang, Renhe,Wen, Min,et al. Effect of the atmospheric quasi-biweekly oscillation on the vortices moving off the Tibetan Plateau[J]. CLIMATE DYNAMICS,2018,50:1193-1207. |
APA | Li, Lun,Zhang, Renhe,Wen, Min,&Lu, Junmei.(2018).Effect of the atmospheric quasi-biweekly oscillation on the vortices moving off the Tibetan Plateau.CLIMATE DYNAMICS,50,1193-1207. |
MLA | Li, Lun,et al."Effect of the atmospheric quasi-biweekly oscillation on the vortices moving off the Tibetan Plateau".CLIMATE DYNAMICS 50(2018):1193-1207. |
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