Comparison of summer raindrop size distribution characteristics in the western and central Tianshan Mountains of China

Meteorological applications

article

Yufei Jiang¹  Lianmei Yang¹  Yong Zeng¹  Zepeng Tong¹  Jiangang Li¹  Fan Liu¹  Jinru Zhang¹  Jin Liu¹ 

[1] Institute of Desert Meteorology, China Meteorological Administration;Xinjiang Cloud Precipitation Physics and Cloud Water Resources Development Laboratory;Field Scientific Observation Base of Cloud Precipitation Physics in West Tianshan Mountains;Contribution: Conceptualization ,(lead), Data curation ,(lead), Formal analysis ,(lead), ​Investigation ,(lead), Methodology ,(lead), Project administration;Contribution: Conceptualization;Contribution: Data curation;Contribution: Funding acquisition ,(supporting), Project administration;Contribution: Funding acquisition

关键词: microphysical characteristics;    raindrop size distribution;    rainfall rate;    Tianshan Mountains;   

DOI  :  10.1002/met.2067

学科分类：社会科学、人文和艺术（综合）

来源: Wiley

【 摘 要 】

The microphysical processes of cloud and precipitation in the Tianshan Mountains still remain unclear due to the complex terrain and the lack of ground-based observational data. In this study, the characteristics of summer raindrop size distribution (RSD) in the western and central Tianshan Mountains of China were investigated in 2020 and 2021. According to the average raindrop spectra, the RSD characteristics exhibit significant differences that the concentration of medium and large particles is relatively higher at Zhaosu than that at Tianchi. Weak precipitation prevails in the Tianshan Mountains most of the time, yet moderate rainfall and heavy rainfall have a great impact on the accumulated rainfall amount. For each rainfall rate class, raindrops of diameter less than 0.75mm have a lower concentration and raindrops of diameter greater than 3 mm have a higher concentration at Zhaosu as compared to those at Tianchi. Compared with Tianchi, Zhaosu has a larger mass-weighted mean diameter (D m ) and a lower normalized intercept parameter (log 10 N w ). Compared with the classical convective spectrum, the RSDs at both Zhaosu and Tianchi are similar to the continental convective cluster. The relationships between the shape and slope ( μ – Λ ), and radar reflectivity and rainfall rate ( Z – R ) exhibit a significant difference in the western and central Tianshan Mountains of China.

【 授权许可】

CC BY|CC BY-NC|CC BY-NC-ND