DOI: 10.1007/s00382-017-3887-3
Scopus记录号: 2-s2.0-85028985992
论文题名: Modulation of the atmospheric quasi-biweekly oscillation on the diurnal variation of the occurrence frequency of the Tibetan Plateau vortices
作者: Li L. ; Zhang R. ; Wen M.
刊名: Climate Dynamics
ISSN: 9307575
出版年: 2018
卷: 50, 期: 2018-11-12 起始页码: 4507
结束页码: 4518
语种: 英语
英文关键词: Condensation latent heat
; Large scale circulation
; Quasi-biweekly oscillation
; Tibetan Plateau vortices
Scopus关键词: condensation
; diurnal variation
; frequency analysis
; latent heat flux
; quasi-biennial oscillation
; China
; Qinghai-Xizang Plateau
英文摘要: In this study, modulation of the atmospheric quasi-biweekly oscillation (QBWO) on diurnal variation of the occurrence frequency of Tibetan Plateau vortices (TPVs) during May–August of 2000–2009 was investigated. The diurnal variations of the occurrence frequency of the TPVs (OFTPVs) and the related dynamic and thermodynamic features in the positive and negative phases of QBWO were compared. In both the positive and negative phases, the OFTPVs reaches the maximum from evening to midnight (18–00 LT, LT indicates the local time), and minimum from early morning to noon (06–12 LT). At 18 LT, there is strongest convergence at 500 hPa and ascending motion, as well as the most abundant net water vapor budget over the Tibetan Plateau, which is in favor of the precipitation and the related condensation latent heat release, corresponding to the maximum of OFTPVs in 18–00 LT. On the contrary, in the early morning at 06 LT, the conditions are most unfavorable for genesis of TPVs in 06–12 LT. QBWO leads to stronger convergence at 500 hPa, ascending motion as well as more massive water vapor in the positive phases than those in the negative phases, resulting in larger numbers of TPVs occur in all of the four periods of a day (00–06 LT, 06–12 LT, 12–18 LT, and 18–00 LT) in the former. The TPVs generating from the early morning to noon (06–12 LT) are weaker and more sensitive and fragile to the disadvantageous background, while the TPVs occurring from evening to midnight (18–00 LT) are stronger and seem to be well tolerated, leading to more remarkable contrast between the OFTPVs in the negative and positive phases in 06–12 LT than in 18–00 LT. © 2017, Springer-Verlag GmbH Germany. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/109260
Appears in Collections: 影响、适应和脆弱性 气候变化事实与影响
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作者单位: State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, #46, Zhong-Guan-Cun South Avenue, Beijing, 100081, China; Institute of Atmospheric Sciences, Fudan University, Shanghai, China; CAS Center for Excellence in Tibetan Plateau Earth Sciences, Beijing, China
Recommended Citation:
Li L.,Zhang R.,Wen M.. Modulation of the atmospheric quasi-biweekly oscillation on the diurnal variation of the occurrence frequency of the Tibetan Plateau vortices[J]. Climate Dynamics,2018-01-01,50(2018-11-12)