气候变化领域集成服务门户(CCPortal): Raindrop size distribution measurements on the Southeast Tibetan Plateau during the STEP project

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DOI	10.1016/j.atmosres.2020.105311
	Raindrop size distribution measurements on the Southeast Tibetan Plateau during the STEP project
	Wang G.; Zhou R.; Zhaxi S.; Liu S.
发表日期	2021
ISSN	0169-8095
卷号	249
英文摘要	As part of the Second Tibetan Plateau Scientific Expedition and Research (STEP) field campaign, raindrop size distribution (DSD) measurements were conducted with a laser optical particle size velocity disdrometer in Motuo on the Tibetan Plateau (TP). The DSD characteristics of five different rain rate classes and convective and stratiform precipitation types were studied using the DSD data from July to September 2019, comprising a total of 47,774 1-min raindrop spectra. The average raindrop spectral width and number concentration of large drops increased with the rainfall intensity. Furthermore, the combination of small- and midsize drops dominated the precipitation in Motuo, and their contributions exceeded 99% of the number concentration. The convective precipitation in Motuo was identified as maritime-like precipitation and was characterized by a large normalized intercept parameter log10Nw = 4.0–4.4 and small mass-weighted mean diameter Dm = 1.1–1.4 mm. Empirical relations among the three parameters (intercept N0, shape μ, and slope Λ) of the gamma distribution model, Nw and Dm of the normalized gamma distribution were derived. We also obtained power-law relationships of Z = ARb for the stratiform and convective precipitation in Motuo, and the empirical relation of Z = 300R1.4 significantly underestimated the convective precipitation in Motuo. When the precipitation type transitioned from stratiform into convective precipitation, coefficient A decreased and exponent b increased. Finally, empirical relations between Dm and the radar equivalent reflectivity factor at the Ku and Ka bands were obtained to improve the rainfall retrieval algorithms of the dual-frequency precipitation radar on the southeast TP. © 2020 The Authors
英文关键词	DSD characteristics; Maritime-like; Power-law relationships; Raindrop size distribution; Southeast Tibetan Plateau
语种	英语
scopus关键词	Drops; Particle size; Radar; Size distribution; Convective precipitation; Dual-frequency precipitation radars; Equivalent reflectivity; Intercept parameters; Power law relationship; Raindrop size distribution; Retrieval algorithms; Stratiform precipitation; Rain; algorithm; convective system; hydrometeorology; power law; precipitation intensity; raindrop; rainfall; size distribution; stratiform cloud; China; Qinghai-Xizang Plateau
来源期刊	Atmospheric Research
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/145213
作者单位	State Key Laboratory of Severe Weather, Chinese Academy of Meteorological Science, 46 South Street Zhongguancun, Beijing, 100081, China; Meteorological Bureau of Motuo County, Jingfan Road, Motuo Town, Motuo CountyTibet 860700, China
推荐引用方式 GB/T 7714	Wang G.,Zhou R.,Zhaxi S.,et al. Raindrop size distribution measurements on the Southeast Tibetan Plateau during the STEP project[J],2021,249.
APA	Wang G.,Zhou R.,Zhaxi S.,&Liu S..(2021).Raindrop size distribution measurements on the Southeast Tibetan Plateau during the STEP project.Atmospheric Research,249.
MLA	Wang G.,et al."Raindrop size distribution measurements on the Southeast Tibetan Plateau during the STEP project".Atmospheric Research 249(2021).