干旱区生态环境知识资源中心(Arid): Seasonal Characteristics of Disdrometer-Observed Raindrop Size Distributions and Their Applications on Radar Calibration and Erosion Mechanism in a Semi-Arid Area of China

Arid

DOI	10.3390/rs12020262
	Seasonal Characteristics of Disdrometer-Observed Raindrop Size Distributions and Their Applications on Radar Calibration and Erosion Mechanism in a Semi-Arid Area of China
	Xie, Zongxu 1,2; Yang, Hanbo 1,2; Lv, Huafang 1,2; Hu, Qingfang 3
通讯作者	Yang, Hanbo
来源期刊	REMOTE SENSING
EISSN	2072-4292
出版年	2020
卷号	12 期号:2
英文摘要	Raindrop size distributions (DSDs) are the microphysical characteristics of raindrop spectra. Rainfall characterization is important to: (1) provide information on extreme rate, thus, it has an impact on rainfall related hazard; (2) provide data for indirect observation, model and forecast; (3) calibrate and validate the parameters in radar reflectivity-rainfall intensity (Z-R) relationships (quantitative estimate precipitation, QPE) and the mechanism of precipitation erosivity. In this study, the one-year datasets of raindrop spectra were measured by an OTT Parsivel-2 Disdrometer placed in Yulin, Shaanxi Province, China. At the same time, four TE525MM Gauges were also used in the same location to check the disdrometer-measured rainfall data. The theoretical formula of raindrop kinetic energy-rainfall intensity (KE-R) relationships was derived based on the DSDs to characterize the impact of precipitation characteristics and environmental conditions on KE-R relationships in semi-arid areas. In addition, seasonal rainfall intensity curves observed by the disdrometer of the area with application to erosion were characterized and estimated. The results showed that after quality control (QC), the frequencies of raindrop spectra data in different seasons varied, and rainfalls with R within 0.5-5 mm/h accounted for the largest proportion of rainfalls in each season. The parameters in Z-R relationships (Z = aR(b)) were different for rainfall events of different seasons (a varies from 78.3-119.0, and b from 1.8-2.1), and the calculated KE-R relationships satisfied the form of power function KE = AR(m), in which A and m are parameters derived from rainfall shape factor mu. The sensitivity analysis of parameter A with mu demonstrated the applicability of the KE-R formula to different precipitation processes in the Yulin area.
英文关键词	raindrop size distribution radar reflectivity raindrop spectrometer semi-arid area
类型	Article
语种	英语
国家	Peoples R China
开放获取类型	gold
收录类别	SCI-E
WOS记录号	WOS:000515569800061
WOS关键词	RAINFALL KINETIC-ENERGY ; DISTRIBUTION VARIABILITY ; INTENSITY RELATIONSHIPS ; PARSIVEL DISDROMETERS ; TERMINAL VELOCITY ; VIDEO DISDROMETER ; WEATHER RADAR ; PRECIPITATION ; REFLECTIVITY ; EROSIVITY
WOS类目	Environmental Sciences ; Geosciences, Multidisciplinary ; Remote Sensing ; Imaging Science & Photographic Technology
WOS研究方向	Environmental Sciences & Ecology ; Geology ; Remote Sensing ; Imaging Science & Photographic Technology
来源机构	清华大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/315411
作者单位	1.Tsinghua Univ, Dept Hydraul Engn, Beijing 100084, Peoples R China; 2.Tsinghua Univ, State Key Lab Hydrosci & Engn, Beijing 100084, Peoples R China; 3.Nanjing Hydraul Res Inst, State Key Lab Hydrowater Resources & Hydraul Engn, Nanjing 210029, Peoples R China
推荐引用方式 GB/T 7714	Xie, Zongxu,Yang, Hanbo,Lv, Huafang,et al. Seasonal Characteristics of Disdrometer-Observed Raindrop Size Distributions and Their Applications on Radar Calibration and Erosion Mechanism in a Semi-Arid Area of China[J]. 清华大学,2020,12(2).
APA	Xie, Zongxu,Yang, Hanbo,Lv, Huafang,&Hu, Qingfang.(2020).Seasonal Characteristics of Disdrometer-Observed Raindrop Size Distributions and Their Applications on Radar Calibration and Erosion Mechanism in a Semi-Arid Area of China.REMOTE SENSING,12(2).
MLA	Xie, Zongxu,et al."Seasonal Characteristics of Disdrometer-Observed Raindrop Size Distributions and Their Applications on Radar Calibration and Erosion Mechanism in a Semi-Arid Area of China".REMOTE SENSING 12.2(2020).