气候变化领域集成服务门户(CCPortal): Assessing the Effect of Riming on Snow Microphysics: The First Observational Study in East China

CCPortal

DOI	10.1029/2020JD033763
	Assessing the Effect of Riming on Snow Microphysics: The First Observational Study in East China
	Zhang Y.; Zheng H.; Zhang L.; Huang Y.; Liu X.; Wu Z.
发表日期	2021
ISSN	2169897X
卷号	126 期号:7
英文摘要	Through the collision and freezing of supercooled droplets on the surface of snow particles, riming can change the density, fall velocity and aspect ratio of snow particles. Riming plays an important role in the formation of precipitation in cold clouds. To our knowledge, the impact of riming on snow microphysics is yet well understood, and there is a lack of observations obtained in China addressing this issue. For the first time in East China, the connection between riming and snow microphysical properties was investigated quantitatively during snow events in two winters. To quantify the degree of riming, the rime mass fraction (FR) is derived using the combination of a 2-D video disdrometer (2DVD) and a weighing gauge. FR is added to the density-diameter and fall velocity-diameter relations, and a quantitative relation between riming and shapes of snowflakes is established based on the in situ observation of the 2DVD. The results show that riming can well explain the variability in the density and fall velocity of snowflakes. The changes in the shape of snowflakes can be divided into two distinct stages with increasing riming: in the initial stage (FR < 0.5), the aspect ratio increases very slowly, while in the later stage (FR > 0.5), the aspect ratio increases rapidly. Direct observations of the continuous changes in the shapes of snowflakes with riming are in good agreement with the retrieval results of radar. © 2021. American Geophysical Union. All Rights Reserved.
英文关键词	Aspect ratio; fall velocity; riming; snow density
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/185355
作者单位	College of Meteorology and Oceanography, National University of Defense Technology, Changsha, China; Hainan Province Weather Modification Center, Haikou, China
推荐引用方式 GB/T 7714	Zhang Y.,Zheng H.,Zhang L.,et al. Assessing the Effect of Riming on Snow Microphysics: The First Observational Study in East China[J],2021,126(7).
APA	Zhang Y.,Zheng H.,Zhang L.,Huang Y.,Liu X.,&Wu Z..(2021).Assessing the Effect of Riming on Snow Microphysics: The First Observational Study in East China.Journal of Geophysical Research: Atmospheres,126(7).
MLA	Zhang Y.,et al."Assessing the Effect of Riming on Snow Microphysics: The First Observational Study in East China".Journal of Geophysical Research: Atmospheres 126.7(2021).