气候变化领域集成服务门户(CCPortal): Particle imaging auto-measurement system for microphysical characteristics of raindrops in natural rain

CCPortal

DOI	10.1016/j.atmosres.2020.104963
	Particle imaging auto-measurement system for microphysical characteristics of raindrops in natural rain
	Zhan X.; Zhao J.; Feng Q.; Shui J.; Guo M.
发表日期	2020
ISSN	0169-8095
卷号	242
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. © 2020 Elsevier B.V.
关键词	Charge coupled devices Rain Sea level Velocity Diameter Disdrometers Fall velocities Raindrop Soil erosion Drops accuracy assessment detection method image analysis numerical model precipitation assessment raindrop rainfall soil erosion
语种	英语
来源机构	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/132457
推荐引用方式 GB/T 7714	Zhan X.,Zhao J.,Feng Q.,et al. Particle imaging auto-measurement system for microphysical characteristics of raindrops in natural rain[J]. Atmospheric Research,2020,242.
APA	Zhan X.,Zhao J.,Feng Q.,Shui J.,&Guo M..(2020).Particle imaging auto-measurement system for microphysical characteristics of raindrops in natural rain.,242.
MLA	Zhan X.,et al."Particle imaging auto-measurement system for microphysical characteristics of raindrops in natural rain".242(2020).