Journal of Arid Meteorology ›› 2022, Vol. 40 ›› Issue (6): 933-944.DOI: 10.11755/j.issn.1006-7639(2022)-06-0933
• Study on rainstorm in arid region • Previous Articles Next Articles
SHA Honge1(), FU Zhao1(), LIU Weicheng1, XU Lili1, LIU Na1, LIU Xinyu2, MA Yihao1
Received:
2022-08-24
Revised:
2022-10-21
Online:
2022-12-31
Published:
2023-01-10
Contact:
FU Zhao
沙宏娥1(), 傅朝1(), 刘维成1, 徐丽丽1, 刘娜1, 刘新雨2, 马绎皓1
通讯作者:
傅朝
作者简介:
沙宏娥(1982—),女,高级工程师,主要从事强对流天气预报及研究. E-mail:shahonge@163.com。
基金资助:
CLC Number:
SHA Honge, FU Zhao, LIU Weicheng, XU Lili, LIU Na, LIU Xinyu, MA Yihao. Mechanism of trigger and maintenance during an extremely torrential rain in semi-arid region of eastern Northwest China[J]. Journal of Arid Meteorology, 2022, 40(6): 933-944.
沙宏娥, 傅朝, 刘维成, 徐丽丽, 刘娜, 刘新雨, 马绎皓. 西北东部半干旱区一次极端特大暴雨的触发和维持机制[J]. 干旱气象, 2022, 40(6): 933-944.
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URL: http://www.ghqx.org.cn/EN/10.11755/j.issn.1006-7639(2022)-06-0933
Fig.1 The distribution of accumulated precipitation (a, color dots, Unit: mm;the color shaded for the terrain height, Unit: m; the red triangle for Zhaijiahe station) and short-term heavy precipitation (the color shaded for maximum hourly precipitation, Unit: mm; the circles for heavy rainfall frequency, the triangle is the maximum frequency) (b) from 20:00 BST 14 to 20:00 BST 15 July 2022 in Qingyang and the evolution of hourly rainfall at representative stations from 00:00 BST to 13:00 BST 15 July 2022 (c)
Fig.4 The evolution of radar composite reflectivity factor on July 15, 2022 (Unit: dBZ) (The red marks are torrential rain stations, among which the triangle is Zhaijiahe station)
Fig.6 The time-height profiles of relative humidity (a, Unit: %) and water vapor flux divergence (b, Unit: 10-7g·hPa-1·cm-2·s-1) over Zhaijiahe station from 20:00 BST July 14 to 08:00 BST July 15, and water vapor flux at 05:00 BST July 15, 2022 at 700 hPa (c, Unit: g·hPa-1·cm-1·s-1)
Fig.7 The distribution of CAPE (Unit: J·kg-1) at 04:00 BST July 15, 2022 over the eastern region of Northwest China (a), the time-height profile of pseudo-equivalent potential temperature (the color shaded, Unit: ℃) and the CAPE change with time(the dotted line) from 20:00 BST July 14 to 12:00 BST July 15, 2022 at Zhaijiahe station (b)
Fig.9 The wind field at 700 hPa at 21:00 BST July 14 (a), 01:00 BST (b) and 06:00 BST (c) July 15, 2022 (vectors, Unit: m·s-1) (the black line for the 12 m·s-1 wind speed isoline)
Fig.10 The surface wind field (vectors, Unit: m·s-1), stream field (the white lines with arrow, the result of wind field interpolation) and terrain height (the color shaded, Unit: m) at 21:00 BST July 14 (a) and 01:00 BST July 15, 2022 (b)
Fig.11 The 700 hPa (a) and 500 hPa (b) vorticity (the color shaded, Unit: 10-4 s-1) and wind field (vectors, Unit: m·s-1) and the divergence (the color shaded, Unit: 10-4 s-1) and wind field (vectors, Unit: m·s-1) at 850 hPa (c) at 06:00 BST July 15,2022, the surface wind field (vectors, Unit: m·s-1) and terrain height (the color shaded, Unit: m) at 04:00 BST July 15, 2022 (d), the zonal vertical section along 107.5°E (e) and the meridional vertical section along 36.5°N (f) of divergence(the color shaded, Unit: 10-4 s-1) and vertical velocity (isolines, Unit: Pa·s-1) (The brown arrow line is low-level jet, and the red rectangular regions are negative vorticity advection areas on the right side of the entrance and the exit of low-level jet,and the area enclosed by black line is Qingyang)
Fig.12 The hourly variation of heating rate of latent heat of condensation (the dotted line) and vertical velocity (the color shaded, Unit: Pa·s-1) over Zhaijiahe station from 00:00 BST to 14:00 BST July 15, 2022
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