Particle imaging auto-measurement system for microphysical characteristics of raindrops in natural rain

doi:10.1016/j.atmosres.2020.104963

	Particle imaging auto-measurement system for microphysical characteristics of raindrops in natural rain
	Zhan, Xiaoyun 1,2; Zhao, Jun 1,2; Feng, Qian 1; Shui, Junfeng 1,2; Guo, Minghang 1,2
刊名	ATMOSPHERIC RESEARCH
	2020-09-15
卷号	242 页码:9
关键词	Raindrop Disdrometer Diameter Fall velocity Soil erosion
ISSN号	0169-8095
DOI	10.1016/j.atmosres.2020.104963
通讯作者	Shui, Junfeng(jfshui@ms.iswc.ac.cn) ; Guo, Minghang(mhguo@ms.iswc.ac.cn)
英文摘要	In order to explore microphysical properties of raindrops, light field and imaging system were designed based on the particle imaging measurement technology. Meanwhile, the software for image identification, extraction and calculation were investigated, and then a raindrop measurement system combined with a charge coupled device sensor was developed. The repeatability and accuracy of steel ball estimation were checked in diameter and fall velocity and yielded low standard deviations and small relative errors. The results demonstrate that the system provides a reliable detection of raindrop size and fall velocity. Additionally, the designed system was operated for in situ measurement of natural rain. Raindrop diameter and fall velocity were, on average, 1.02 mm and 3.45 m s(-1), respectively, and small-sized particles were the predominant contributor to the natural rainfall. Notably, raindrop fall velocities were slightly higher than the corresponding terminal velocities calculated by classical models under the standard sea-level conditions. In order to identify completely the features and variations of raindrops, it is essential to implement long-term measurements and take into account the driving factors such as air motions, raindrop breakup or coalescence. This work will be pursued soon in coming future.
资助项目	National Key R&D Program of China[2017YFA0604803] ; Strategic Priority Research Program of the Chinese Academy of Sciences (Pan-Third Pole Environment Study for a Green Silk Road)[XDA20040202] ; Innovation Project of the State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau[A314021403-C3] ; 13th Five-year Informatization Plan of Chinese Academy of Sciences[XXH13505-07]
WOS关键词	SIZE DISTRIBUTION ; POLARIMETRIC RADAR ; VIDEO DISDROMETER ; DISTRIBUTIONS ; SEDIMENT ; PARAMETERS ; COLLISION ; BREAKUP ; SOIL
WOS研究方向	Meteorology & Atmospheric Sciences
语种	英语
出版者	ELSEVIER SCIENCE INC
WOS记录号	WOS:000535422200004
资助机构	National Key R&D Program of China ; Strategic Priority Research Program of the Chinese Academy of Sciences (Pan-Third Pole Environment Study for a Green Silk Road) ; Innovation Project of the State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau ; 13th Five-year Informatization Plan of Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/159568]
专题	中国科学院地理科学与资源研究所
通讯作者	Shui, Junfeng; Guo, Minghang
作者单位	1.Northwest A&F Univ, State Key Lab Soil Eros & Dryland Farming Loess P, Yangling 712100, Shaanxi, Peoples R China 2.Chinese Acad Sci & Minist Water Resources, Inst Soil & Water Conservat, 26 Xinong Rd, Yangling 712100, Shaanxi, Peoples R China
推荐引用方式 GB/T 7714	Zhan, Xiaoyun,Zhao, Jun,Feng, Qian,et al. Particle imaging auto-measurement system for microphysical characteristics of raindrops in natural rain[J]. ATMOSPHERIC RESEARCH,2020,242:9.
APA	Zhan, Xiaoyun,Zhao, Jun,Feng, Qian,Shui, Junfeng,&Guo, Minghang.(2020).Particle imaging auto-measurement system for microphysical characteristics of raindrops in natural rain.ATMOSPHERIC RESEARCH,242,9.
MLA	Zhan, Xiaoyun,et al."Particle imaging auto-measurement system for microphysical characteristics of raindrops in natural rain".ATMOSPHERIC RESEARCH 242(2020):9.