Journal of Arid Meteorology ›› 2022, Vol. 40 ›› Issue (6): 909-921.DOI: 10.11755/j.issn.1006-7639(2022)-06-0909
• Study on rainstorm in arid region • Previous Articles Next Articles
FU Zhao(), LIU Weicheng(), SONG Xingyu, XU Lili, SHA Honge, MA Li, CUI Yu
Received:
2022-11-13
Revised:
2022-12-20
Online:
2022-12-31
Published:
2023-01-10
Contact:
LIU Weicheng
傅朝(), 刘维成(), 宋兴宇, 徐丽丽, 沙宏娥, 马莉, 崔宇
通讯作者:
刘维成
作者简介:
傅朝(1967—),男,正研级高级工程师,主要从事强对流天气的分析研究. E-mail:dry52889@hotmail.com。
基金资助:
CLC Number:
FU Zhao, LIU Weicheng, SONG Xingyu, XU Lili, SHA Honge, MA Li, CUI Yu. Local enhanced convective environment characteristics of an extreme rainstorm event in arid region of Northwest China[J]. Journal of Arid Meteorology, 2022, 40(6): 909-921.
傅朝, 刘维成, 宋兴宇, 徐丽丽, 沙宏娥, 马莉, 崔宇. 西北干旱区一次极端暴雨局地性增强的对流环境特征[J]. 干旱气象, 2022, 40(6): 909-921.
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URL: http://www.ghqx.org.cn/EN/10.11755/j.issn.1006-7639(2022)-06-0909
Fig.1 The spatial distribution of 24-hour accumulated precipitation in Hexi of Gansu Province from 08:00 BST 12 to 08:00 BST 13 August 2022 (Unit: mm) (a) and the evolution of hourly precipitation at Jinta station and its suburban regional automatic meteorological stations (The area enclosed by the dotted line in Fig.1(a) is Suzhou District and Jinta County of Jiuquan City)
Fig.2 The geopotential height (isolines, Unit: dagpm) and divergence (color shaded areas, Unit: 10-5 s-1) at 200 hPa at 08:00 BST (a), 20:00 BST (b) 12 August, and 500 hPa geopotential height (black isolines, Unit: dagpm), temperature (red isolines, Unit: ℃) and wind field (wind vectors, Unit: m·s-1) at 20:00 BST 12 August (c) and at 08:00 BST 13 August (d) 2022 (The blue dot represents the location of the Jinta station. the same as below)
Fig.3 700 hPa geopotential height (black isolines, Unit: dagpm), temperature (red isolines, Unit: ℃), shear line (brown solid lines), significant streamline (black arrow lines) (a), and sea level pressure (isolines, Unit: hPa), significant streamline (black arrow line), surface cold front (blue tooth-line) (b) at 20:00 BST 12 August 2022
Fig.4 700 hPa streamline (arrow lines) and specific humidity (color shaded areas, Unit: g·kg-1) at 20:00 BST 12 August (a) and 02:00 BST 13 August (b) 2022 (The surface pressure in gray filled area is less than 700 hPa)
Fig.5 The specific humidity (isolines, Unit: g·kg-1), vapor flux divergence (color shaded areas, Unit: 10-7 g·hPa-1·cm-2·s-1), wind field (arrow vectors, Unit: m·s-1) at 700 hPa (a, b), and whole layer integrated atmospheric precipitable water (Unit: mm) (c, d) at 20:00 BST 12 August (a, c) and 00:00 BST 13 August (b, d) 2022 [The surface pressure for the gray filled areas in Fig. 5(a) and Fig. 5(b) is less than 700 hPa]
Fig.6 T-ln P diagram (a, b) at Jinta station and convective effective potential energy (CAPE) (Unit: J·kg-1) (c, d) at 20:00 BST 12 August (a, c) and 00:00 BST on 13 August (b, d) 2022 (The red, black, green solid lines are stratification curve, state curve and dew point temperature, respectively)
Fig.7 The time-height cross-section of specific humidity (isolines,Unit: g·kg-1), pseudo-equivalent potential temperature (color shaded areas, Unit: K) and wind field (wind vectors, Unit: m·s-1) at Jinta station from 10:00 BST 12 August to 10:00 BST 13 August 2022
Fig.8 The combined reflectivity factor from Jiayuguan radar station at 20:01 BST (a), 20:58 BST (b), 22:01 BST (c), 22:58 BST (d) 12 August and 00:01 BST (e), 01:03 BST (f), 02:00 BST (g), 03:03 BST (h) 13 August 2022 (Unit: dBZ) (The black triangle represents Jinta station, the English capital letters connected by red line represent convective cells or systems)
Fig.9 The vertical profile of radar reflectivity factor of convective cell A at 21:33 BST on August 12 (a) and convective cell D at 00:29 BST (b) and 02:12 BST (c) on August 13, 2022 (Unit: dBZ)
Fig.10 The specific humidity (isolines, Unit: g·kg-1), temperature (color shaded areas, Unit: ℃), wind field (arrow vectors, Unit: m·s-1) at 850hPa (a), and surface dewpoint temperature greater than or equal to 12 ℃(black isolines, Unit: ℃), cold front (blue tooth-line), dryline (black circular tooth-line) (b) at 20:00 BST on August 12, 2022 (The surface pressure in gray area is less than 850 hPa.)
Fig.11 The specific humidity(green isolines, Unit: g·kg-1), frontogenesis function (color shaded areas, Unit: K·m-1·s-1), wind vector (arrow vectors, Unit:m·s-1) at 850hPa (a), and vertical profiles of frontogenesis function (color shaded areas, Unit: K·m-1·s-1), vertical velocity (gray isolines, Unit: hPa·s-1), wind (arrow vector , the composite of vertical velocity with the projection of horizontal wind,Unit:m·s-1) (b) at 20:00 BST on August 12, 2022 (The surface pressure for the gray filled areas in Fig. 11(a) is less than 700 hPa;the left corner in Fig. 11 (b) is diagram of the profile line and the black areas for the terrain. the same as below)
Fig.12 The specific humidity (isolines, Unit: g·kg-1) and frontogenesis function (color shaded areas, Unit:K·m-1·s-1), wind (arrow vector , Unit:m·s-1) at 850 hPa at 22:00 BST on August 12 (a), surface dewpoint temperature greater than or equal to 12 ℃ (black isolines, Unit: ℃), cold front (blue tooth-line), dryline (black circular tooth-line) at 23:00 BST on August 12 (b),and vertical profiles of frontogenesis function (color shaded areas, Unit: K·m-1·s-1), vertical velocity (gray isolines, Unit: hPa·s-1), wind (arrow vector, composite of vertical velocity with projection of horizontal wind on the profile, Unit: m·s-1) at 23:00 BST on August 12 (c) and 00:00 BST on August 13 (d), 2022 (The red letter T is three-point position of the cold front and the dryline)
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