气候变化领域集成服务门户(CCPortal): Effects of Terrain and Landmass Near Fujian Province of China on the Structure and Propagation of a Long-Lived Rainband in Typhoon Longwang (2005): A Numerical Study

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DOI	10.1029/2020JD033393
	Effects of Terrain and Landmass Near Fujian Province of China on the Structure and Propagation of a Long-Lived Rainband in Typhoon Longwang (2005): A Numerical Study
	Li Y.; Wang Y.; Lin Y.; Fei R.; Gao J.
发表日期	2020
ISSN	2169897X
卷号	125 期号:22
英文摘要	A ~14-hr long-lived spiral rainband in Typhoon Longwang (2005) produced catastrophic rainfall in Fujian Province of China on 2 October 2005. In this study, the effects of terrain and landmass near Fujian on the structure and propagation of this rainband are investigated through high-resolution numerical simulations. Results show that although the terrain and landmass near Fujian played a marginal role in the formation of the rainband, both greatly affected the structure and propagation of the rainband. Namely, convection in the upwind sector of the rainband tended to be maintained and locked up near the coastline in the control experiment with both the terrain and landmass near Fujian retained, but shrank more inland with the terrain near Fujian flattened, and further inland with the landmass near Fujian replaced by the virtual ocean. It is found that due to the land-sea surface roughness contrast, the upstream tangential winds from ocean would be substantially decelerated over land and thus induced a local subgradient force onshore near the coastline. The radially inward agradient force and the subsequent surface friction helped maintain the moisture convergence, and thus convection and the cold pool in the upwind sector of the rainband near the coastline. Although the orographic lifting and blocking effects were found to be marginal to the moisture convergence in the rainband, the terrains near Fujian enhanced the deceleration of surface winds, enhancing the effect of land-sea surface roughness contrast on low-level moisture convergence and thus the lockup of the upwind sector of the rainband. ©2020. American Geophysical Union. All Rights Reserved.
英文关键词	Land-sea contrast; moisture convergence; Orographic effect; Rainband; Typhoon
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/185629
作者单位	Ministry of Education Key Laboratory for Earth System Modeling, Department of Earth System Science, and Joint Center for Global Change Studies (JCGCS), Tsinghua University, Beijing, China; International Pacific Research Center and Department of Atmospheric Sciences, School of Ocean and Earth Science and Technology, University of Hawaii at Mānoa, Honolulu, HI, United States; State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Sciences, China Meteorological Administration, Beijing, China; Fujian Key Laboratory of Severe Weather, Meteorological Bureau of Fujian Province, China Meteorological Administration, Fuzhou, China
推荐引用方式 GB/T 7714	Li Y.,Wang Y.,Lin Y.,et al. Effects of Terrain and Landmass Near Fujian Province of China on the Structure and Propagation of a Long-Lived Rainband in Typhoon Longwang (2005): A Numerical Study[J],2020,125(22).
APA	Li Y.,Wang Y.,Lin Y.,Fei R.,&Gao J..(2020).Effects of Terrain and Landmass Near Fujian Province of China on the Structure and Propagation of a Long-Lived Rainband in Typhoon Longwang (2005): A Numerical Study.Journal of Geophysical Research: Atmospheres,125(22).
MLA	Li Y.,et al."Effects of Terrain and Landmass Near Fujian Province of China on the Structure and Propagation of a Long-Lived Rainband in Typhoon Longwang (2005): A Numerical Study".Journal of Geophysical Research: Atmospheres 125.22(2020).