气候变化领域集成服务门户(CCPortal): Land-Surface Diurnal Effects on the Asymmetric Structures of a Postlandfall Tropical Storm

CCPortal

DOI	10.1029/2020JD033842
	Land-Surface Diurnal Effects on the Asymmetric Structures of a Postlandfall Tropical Storm
	Zhang F.; Pu Z.; Wang C.
发表日期	2021
ISSN	2169897X
卷号	126 期号:1
英文摘要	After a tropical storm makes landfall, its vortex interacts with the surrounding environment and the underlying surface. It is expected that diurnal variation over land will affect storm structures. However, this has not yet been explored in previous studies. In this paper, numerical simulation of postlandfall Tropical Storm Bill (2015) is conducted using a research version of the NCEP Hurricane Weather Research and Forecasting (HWRF) model. Results indicate that during the storm's interaction with midlatitude westerlies over the Great Plains, the simulated storm with the SLAB land-surface scheme is stronger, with faster eastward movement and attenuation, and more asymmetric structures than that with the NOAH land-surface scheme. More symmetric structures correspond with a slower weakening and slower eastward movement of the storm over land. Further diagnoses suggest an obvious response of the storm's asymmetric structures to diurnal effects over land. Surface diabatic heating in the storm environment is important for the storm's symmetric structures and intensity over land. Specifically, during the transition from nighttime to daytime, the evident strengthening of convective instability, atmospheric baroclinicity, and the lateral advection of high (Formula presented.) air in the storm environment, associated with the rapid increase in surface diabatic heating, are conducive to the development of vertical vorticity and storm-relative helicity, thus contributing to the maintenance of the storm's symmetric structures and intensity after landfall. © 2020. University of Utah.
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/185559
作者单位	College of Atmospheric Sciences, Lanzhou University, Lanzhou, China; Department of Atmospheric Sciences, University of Utah, Salt Lake City, UT, United States
推荐引用方式 GB/T 7714	Zhang F.,Pu Z.,Wang C.. Land-Surface Diurnal Effects on the Asymmetric Structures of a Postlandfall Tropical Storm[J],2021,126(1).
APA	Zhang F.,Pu Z.,&Wang C..(2021).Land-Surface Diurnal Effects on the Asymmetric Structures of a Postlandfall Tropical Storm.Journal of Geophysical Research: Atmospheres,126(1).
MLA	Zhang F.,et al."Land-Surface Diurnal Effects on the Asymmetric Structures of a Postlandfall Tropical Storm".Journal of Geophysical Research: Atmospheres 126.1(2021).