Observed Microphysical Characteristics of Stratiform and Convective Precipitation over an Inland Arid Region of the Qinghai–Tibet Plateau

Water

卷:12

Ji Chen¹  Haiyun Shi²  Jinzhao Wang³  Peichong Pan³  Hongwei Xie³ 

[1] Department of Civil Engineering, The University of Hong Kong, Hong Kong 999077, China;

[2] State Environmental Protection Key Laboratory of Integrated Surface Water-Groundwater Pollution Control, School of Environmental Science and Engineering, Southern University of Science and Technology, Shenzhen 518055, China;

[3] State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China;

关键词: stratiform precipitation;    convective precipitation;    raindrop size distribution;    microphysical characteristics;    Z–R relationship;    Qinghai–Tibet plateau;   

DOI  :  10.3390/w12082300

来源: DOAJ

【 摘 要 】

This study analyzed the microphysical characteristics of stratiform and convective precipitation over an inland arid region of Qinghai–Tibet Plateau in summer for the first time. The observed precipitation data were from the OTT Parsivel² laser raindrop spectrometer and the raindrop size distribution can be described by a gamma distribution and a general exponential distribution. The results indicate that: (1) compared to the exponential distribution, the gamma distribution is the better function with which to describe the raindrop size distribution in this region; (2) the raindrop sizes are mainly below 1 mm, and the raindrop sizes which contribute most to the rainfall intensity are below 2 mm for stratiform precipitation and convective precipitation; (3) the mean values of microphysical parameters, e.g., rainfall intensity, radar reflectivity factor, and liquid water content, are higher for convective precipitation than stratiform precipitation; and (4) the standard Z–R relationship underestimates the radar reflectivity factor in this region. Overall, the obtained results will enhance our understanding and facilitate future studies regarding the microphysical characteristics of precipitation in such regions. For example, the obtained Z–R relationship can be a reference for estimating the radar reflectivity factor in this region with higher accuracy.

【 授权许可】

Unknown