DOI: 10.1002/2016JD025915
论文题名: A numerical study of the convection triggering and propagation associated with sea breeze circulation over Hainan Island
作者: Liang Z. ; Wang D. ; Liu Y. ; Cai Q.
刊名: Journal of Geophysical Research: Atmospheres
ISSN: 2169897X
出版年: 2017
卷: 122, 期: 16 起始页码: 8567
结束页码: 8592
语种: 英语
英文关键词: convection triggering
; Hainan Island
; propagation
; sea breeze circulation
英文摘要: Based on high-resolution numerical simulations, the effects of sea breeze circulation (SBC) on associated convective initiation and propagation over Hainan Island are investigated. The results show that the blocking of synoptic wind on the windward side of the mountains inhibits the occurrence of windward-side valley breeze and sea breeze. In the context of low mountains, weak synoptic wind not only favors the combination of the SBC with the valley breeze circulation on the leeward side of the mountains but also makes the convergence zone between the synoptic wind and the leeward-side combined circulation stay near the tops of the mountains, leading to the accumulation of large quantities of water vapor taking place over the mountaintops. The combined effect of enhanced water vapor and high temperatures over the mountaintops can result in the generation of much larger convective available potential energy (CAPE) than the surrounding areas. The coupling of the large CAPE with the considerable converging ascending motion and abundant water vapor near the tops of the mountains promotes the occurrence of a strong convection band (CB) over the mountaintops. During the CB propagation under the steering of synoptic wind, the flow across the CB continuously and strongly opposes the SBC front and the fronts of the Kelvin-Helmholtz billows behind, resulting in successive and strong lifting motion as well as large quantities of water vapor and high CAPE near these fronts. These lead to an apparent downstream wave-like propagation of the CB. ©2017. American Geophysical Union. All Rights Reserved. 资助项目: 41575047
; 91437215
; 91437221
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62606
Appears in Collections: 影响、适应和脆弱性 气候减缓与适应
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作者单位: State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China; Guangdong Province Key Laboratory for Climate Change and Natural Disaster Studies, School of Atmospheric Sciences, Sun Yat-sen University, Guangzhou, China; Hainan Meteorological Service, Haikou, China
Recommended Citation:
Liang Z.,Wang D.,Liu Y.,et al. A numerical study of the convection triggering and propagation associated with sea breeze circulation over Hainan Island[J]. Journal of Geophysical Research: Atmospheres,2017-01-01,122(16)