气候变化领域集成服务门户(CCPortal): A Modeling Study of an Atmospheric Bore Associated With a Nocturnal Convective System Over China

CCPortal

DOI	10.1029/2019JD032279
	A Modeling Study of an Atmospheric Bore Associated With a Nocturnal Convective System Over China
	Zhang S.; Parsons D.B.; Xu X.; Wang Y.; Liu J.; Abulikemu A.; Shen W.; Zhang X.; Zhang S.
发表日期	2020
ISSN	2169897X
卷号	125 期号:18
英文摘要	Bores have been shown to play a role in the initiation and maintenance of mesoscale convective systems (MCSs), particularly during the night after the boundary layer stabilizes. To date, the generation, evolution, and structure of bores over China has received little attention. This study utilizes observations and simulations with the WRF-ARW model to investigate the generation and evolution of an atmospheric bore observed over Yangtze-Huai Plains of China. The bore was associated with a nocturnal MCS that first formed over elevated terrain. The bore was observed ahead of the MCS with a maximum lateral extension of ~100 km. The feature lasted for over 90 mins and propagated at a speed of ~13 m/s, slightly faster than the MCS. In the simulation, the bore evolved from the separating “head” of the convectively generated gravity current. The bore then continued to propagate ahead of the MCS, even after the dissipation of the feeder current, and took on the appearance of an undular bore. The bore lifted a layer of convectively unstable air above the nocturnal surface inversion, initiating new convection ahead of the MCS to help maintain the MCS. The Scorer parameter ahead of the bore revealed a low-level wind profile with curvature of the vertical profile of horizontal wind, favoring the trapping of wave energy and the persistence of the bore. These results are generally consistent with the role of bores in the maintenance of nocturnal MCSs and emphasize the need for future studies into the relationship between bores and nocturnal MCSs over China. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	atmospheric bore; nocturnal convection
语种	英语
来源期刊	Journal of Geophysical Research: Atmospheres
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/185770
作者单位	Nanjing Joint Institute for Atmospheric Sciences, Chinese Academy of Meteorological Sciences, Nanjing, China; State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, Beijing, China; School of Meteorology, University of Oklahoma, Norman, OK, United States; Key Laboratory of Mesoscale Severe Weather (Ministry of Education), School of Atmospheric Sciences, Nanjing University, Nanjing, China; Nanjing Automation Institute of Water Conservancy and Hydrology, Ministry of Water Resources, Nanjing, China; College of Resources and Environment Sciences, Xinjiang University, Urumqi, China; Zhejiang Provincial Meteorological Observatory, Hangzhou, China; National Meteorological Center, China Meteorological Administration, Beijing, China; Jiangsu Provincial Meteorological Observatory, Nanjing, China
推荐引用方式 GB/T 7714	Zhang S.,Parsons D.B.,Xu X.,et al. A Modeling Study of an Atmospheric Bore Associated With a Nocturnal Convective System Over China[J],2020,125(18).
APA	Zhang S..,Parsons D.B..,Xu X..,Wang Y..,Liu J..,...&Zhang S..(2020).A Modeling Study of an Atmospheric Bore Associated With a Nocturnal Convective System Over China.Journal of Geophysical Research: Atmospheres,125(18).
MLA	Zhang S.,et al."A Modeling Study of an Atmospheric Bore Associated With a Nocturnal Convective System Over China".Journal of Geophysical Research: Atmospheres 125.18(2020).