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Arid Land Geography >

2021 , Vol. 44 >Issue 6: 1580 - 1589

DOI: https://doi.org/10.12118/j.issn.1000–6060.2021.06.07

Climatology and Hydrology

Cloud parameter characteristics of a β-mesoscale short-term rainstorm in the central of the northern slope of Tianshan Mountains

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  • 1. Urumqi Meteorological Center of CAAC, Urumqi 830016, Xinjiang, China
    2. Xinjiang Meteorological Observatory, Urumqi 830002, Xinjiang, China

Received date: 2021-01-01

  Revised date: 2021-05-14

  Online published: 2021-12-03

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Abstract

The cloud microphysical structure characteristics and the causes of a rainstorm weather process occurring on June 16, 2019 in the Shihezi reclamation area, Xinjiang, China are analyzed using automatic weather station data, NCAR/NCEP FNL 0.5°×0.5° reanalysis data, and the L2 quantitative product data of FY-4A/AGRI. The results are as follows: (1) The rainstorm mainly occurred in the circulation background under the joint influence of shortwave trough at the bottom of Lake Balkhash trough and the 700- and 850-hPa shear and convergence lines, respectively. (2) Good correspondence was observed between the development and the consolidation of TBB and the rapid development and the consolidation of the rainstorm cloud cluster. After TBB dropped to -52 °C, it began to rain in the rainstorm cloud cluster, and the rainstorm area mainly occurred in the dense area of the TBB isoline. The cloud top height of the rainstorm cloud cluster could develop up to 12 km. In the process of cloud cluster development, the cloud top phase was composed of mixed clouds that contain water and ice clouds; however, supercooled water clouds were mainly occupied. (3) The 700- and 850-hPa shear and convergence lines, respectively, and the ground provided favorable dynamic conditions for the rainstorm, the strong vertical ascending motion carried abundant water vapor, which leads to the occurrence of rainstorm, and the water vapor path of the rainstorm mainly had two paths—westward and southward.

Key words： cloud microphysical structure; temperature black body(TBB); β mesoscale; short-term terrain; FY-4A

Cite this article

WANG Qingping,QIN He,CHENG Haiyan,ZHANG Tiancheng,CHEN Chunyan . Cloud parameter characteristics of a β-mesoscale short-term rainstorm in the central of the northern slope of Tianshan Mountains[J]. Arid Land Geography, 2021 , 44(6) : 1580 -1589 . DOI: 10.12118/j.issn.1000–6060.2021.06.07

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