热带气象学报2025，Vol.41Issue(6)：833-846,14.DOI:10.16032/j.issn.1004-4965.2025.074
中国南海北部及沿海汛期降水的雨滴谱特征分析
Analysis of Raindrop Size Distribution of Precipitation During Flood Season in the Northern and Coastal Regions of South China Sea
摘要
Abstract
This study analyzes the characteristics of raindrop size distribution in the coastal areas and the northern regions of the South China Sea during pre-and post-monsoon periods.The study utilizes one-dimensional observation data from the Yongxing Island Observatory in the South China Sea from 2020 to 2022,and from three stations including Zhuhai,Guangzhou,and Foshan in Guangdong Province from 2018 to 2022.The analysis includes the Dm-Nw distribution characteristics in different flood seasons,the variations of the particle size distribution with rainfall intensity and diurnal variations,and the μ-Λand Z-Rrelationships.The results show that,influenced by lower aerosol concentrations and higher evaporation rates over the ocean,the number concentration of small raindrops in oceanic flood season precipitation is lower than that in coastal precipitation.For a given rainfall intensity,when it is less than 10 mm·h-1,the fitted spectra of medium-sized raindrops in oceanic and coastal precipitation show almost consistent trends across pre-and post-flood season.However,with increasing rainfall intensity,the difference in number concentration of medium and large raindrops among different precipitation types gradually increases.The number of large raindrops in both coastal and oceanic precipitation is mainly concentrated in the evening and nighttime during the post-flood season.The μ-Λrelationships within the same region show similarity.As Λ increases,the μ values of coastal pre-and post-flood season precipitation show significant differences,with the μ value of post-flood season precipitation being larger than that of the pre-flood season.This indicates that the concentration of small raindrops in pre-flood season precipitation is lower than that in post-flood season precipitation,and the high concentration of small raindrops is the reason for the relatively small μ.Furthermore,significant differences exist in the Z-R relationships at different latitudes.The raindrop diameter and number concentration in coastal post-flood season precipitation are both larger than those in the pre-flood season,while these parameters in oceanic pre-and post-flood season precipitation are similar.关键词
雨滴谱/汛期降水/中国南海/Z-R关系Key words
raindrop size distribution/flood season precipitation/South China Sea/Z-Rrelationship分类
天文与地球科学引用本文复制引用
HUANG Chaoying,CHEN Sheng,SUN Qibin,XIAN Xinghe,WANG Guozhang,CAI Yiping,MO Weiqiang..中国南海北部及沿海汛期降水的雨滴谱特征分析[J].热带气象学报,2025,41(6):833-846,14.基金项目
广西重点研发项目(AB22080104,AB22035016) （AB22080104,AB22035016）
中国科学院高层次人才计划项目(E2290702) （E2290702）
2025年中国气象局复盘总结专项(FPZJ2025-093) （FPZJ2025-093）
中国气象局雷达气象重点开放实验室开放课题(2023LRM-B06) （2023LRM-B06）
广东省气象局科学技术研究项目(GRMC2023M57) （GRMC2023M57）
南方海洋科学与工程广东省实验室(珠海)重点项目(SML2023SP213) （珠海）
东莞市气象局2023年科技项目(202301)共同资助 （202301）
