气候变化领域集成服务门户(CCPortal): Idealized Model Simulations to Determine Impacts of Storm-Relative Winds on Differential Reflectivity and Specific Differential Phase Fields

CCPortal

DOI	10.1029/2020JD033870
	Idealized Model Simulations to Determine Impacts of Storm-Relative Winds on Differential Reflectivity and Specific Differential Phase Fields
	Loeffler S.D.; Kumjian M.R.
发表日期	2020
ISSN	2169897X
卷号	125 期号:24
英文摘要	Hydrometeors of varying sizes have different fall speeds; for example, larger raindrops have greater fall speeds than smaller raindrops. The resultant differential sedimentation leads to differences in residence time in a sorting layer where drops can be advected by the storm-relative winds. The resulting size sorting has an effect on the polarimetric radar variables including specific differential phase KDP and differential reflectivity ZDR. This study uses a simple numerical model of raindrop size sorting to analyze and further elucidate the relationship between the storm-relative winds and the ZDR and KDP fields. Increased mean storm-relative winds lead to increased ZDR magnitudes and decreased KDP magnitudes. The separation distance between ZDR and KDP maxima is proportional to the magnitude of the mean storm-relative wind and the orientation of a vector from ZDR to KDP maxima is aligned with the mean storm-relative wind over the sorting layer. Further, it is shown that larger values of storm-relative helicity are associated with greater separation distances and separation orientations approaching orthogonal to the shear vector over the sorting layer. © 2020. American Geophysical Union. All Rights Reserved.
英文关键词	idealized modeling; polarimetric radar; radar
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/185581
作者单位	Department of Meteorology and Atmospheric Science, The Pennsylvania State University, University Park, PA, United States
推荐引用方式 GB/T 7714	Loeffler S.D.,Kumjian M.R.. Idealized Model Simulations to Determine Impacts of Storm-Relative Winds on Differential Reflectivity and Specific Differential Phase Fields[J],2020,125(24).
APA	Loeffler S.D.,&Kumjian M.R..(2020).Idealized Model Simulations to Determine Impacts of Storm-Relative Winds on Differential Reflectivity and Specific Differential Phase Fields.Journal of Geophysical Research: Atmospheres,125(24).
MLA	Loeffler S.D.,et al."Idealized Model Simulations to Determine Impacts of Storm-Relative Winds on Differential Reflectivity and Specific Differential Phase Fields".Journal of Geophysical Research: Atmospheres 125.24(2020).