Journal of Arid Meteorology ›› 2023, Vol. 41 ›› Issue (1): 103-113.DOI: 10.11755/j.issn.1006-7639(2023)-01-0103
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GUO Feiyan1(), DIAO Xiuguang2(
), CHU Yingjia3, LI Xin1, LU Xue1, ZHANG Shaobo1
Received:
2021-11-05
Revised:
2021-12-12
Online:
2023-02-28
Published:
2023-02-28
郭飞燕1(), 刁秀广2(
), 褚颖佳3, 李欣1, 陆雪1, 张少博1
通讯作者:
刁秀广(1964—),男,正高级工程师,主要从事天气雷达应用研究。E-mail: radardxg@126.com。作者简介:
郭飞燕(1986—),女,高级工程师,博士,主要从事强对流天气预报研究。E-mail: guofeiyan01@163.com。
基金资助:
CLC Number:
GUO Feiyan, DIAO Xiuguang, CHU Yingjia, LI Xin, LU Xue, ZHANG Shaobo. Contrast analysis of dual-polarization signatures for the two extreme rainfall storms[J]. Journal of Arid Meteorology, 2023, 41(1): 103-113.
郭飞燕, 刁秀广, 褚颖佳, 李欣, 陆雪, 张少博. 两次极端强降水风暴双偏振参量特征对比分析[J]. 干旱气象, 2023, 41(1): 103-113.
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北京时 | K(ΔT) /℃ | LI* /(℃) | CAPE*(CIN)/(J·kg-1) | 垂直风切变/(m·s-1) | 比湿/(g·kg-1) | 高度/km | SRH/ (m2·s-2) | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0~6 km | 0~2 km | 700 hPa | 850 hPa | 925 hPa | 0 ℃ | -10 ℃ | -20 ℃ | -30 ℃ | |||||
4日20:00 | 40(22) | -3.9 | 2 700(324) | 13 | 3 | 11 | 14 | 17 | 5.2 | 7.0 | 8.7 | 10.2 | 30 |
5日08:00 | 35(20) | -3.4 | 1 152(38) | 6 | 2 | 9 | 13 | 17 | 5.3 | 7.2 | 8.9 | 10.2 | 6 |
6日08:00 | 39(24) | -5.2 | 2 700(96) | 8 | 8 | 10 | 14 | 16 | 5.3 | 7.2 | 8.8 | 10.3 | 120 |
6日20:00 | 35(23) | 0.2 | 126(43) | 13 | 7 | 11 | 14 | 16 | 5.4 | 7.5 | 9.1 | 10.5 | 79 |
Tab.1 The environmental physical parameters calculated by radiosonde data of Zhangqiu of Ji'nan
北京时 | K(ΔT) /℃ | LI* /(℃) | CAPE*(CIN)/(J·kg-1) | 垂直风切变/(m·s-1) | 比湿/(g·kg-1) | 高度/km | SRH/ (m2·s-2) | ||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
0~6 km | 0~2 km | 700 hPa | 850 hPa | 925 hPa | 0 ℃ | -10 ℃ | -20 ℃ | -30 ℃ | |||||
4日20:00 | 40(22) | -3.9 | 2 700(324) | 13 | 3 | 11 | 14 | 17 | 5.2 | 7.0 | 8.7 | 10.2 | 30 |
5日08:00 | 35(20) | -3.4 | 1 152(38) | 6 | 2 | 9 | 13 | 17 | 5.3 | 7.2 | 8.9 | 10.2 | 6 |
6日08:00 | 39(24) | -5.2 | 2 700(96) | 8 | 8 | 10 | 14 | 16 | 5.3 | 7.2 | 8.8 | 10.3 | 120 |
6日20:00 | 35(23) | 0.2 | 126(43) | 13 | 7 | 11 | 14 | 16 | 5.4 | 7.5 | 9.1 | 10.5 | 79 |
Fig.2 Combined reflectivity (Unit: dBZ) at 05:03 (a) and 07:16 (b), and ZH (c, Unit: dBZ), ZDR (d, Unit: dB), KDP (e, Unit:(°)·km-1), CC (f) at 0.5° elevation from Ji'nan radar at 07:16 on 5 August 2020 (The blue solid, dash and dotted isolines are 45, 50 and 55 dBZ isoline of ZH respecitvely, the green solid isoline is V convergence line. the same as below)
Fig.3 Combined reflectivity (Unit: dBZ) at 18:30 (a) and 19:22 (b), and ZH (c, Unit: dBZ), ZDR (d, Unit: dB), KDP (e, Unit:(°)·km-1), CC(f) at 0. 5° elevation from Ji'nan radar at 19:22 on 6 August 2020
站点 | 北京时 | ZH /dBZ | ZDR/dB | KDP/[(°)·km-1] | CC | ||||
---|---|---|---|---|---|---|---|---|---|
范围 | 均值 | 范围 | 均值 | 范围 | 均值 | 范围 | 均值 | ||
王庄集附近 | 8月5日07:16 | 53.0~58.0 | 56.2 | 1.0~1.8 | 1.4 | 2.7~3.6 | 3.1 | 0.96~0.99 | 0.98 |
大安站附近 | 8月6日19:22 | 47.0~54.0 | 50.8 | 1.1~2.5 | 1.8 | 2.0~3.5 | 2.9 | 0.96~0.99 | 0.98 |
新兖和兴隆庄附近 | 8月6日19:22 | 50.0~56.5 | 53.5 | 1.2~4.5 | 2.9 | 3.1~6.4 | 4.8 | 0.91~0.99 | 0.97 |
Tab.2 The dual-polarization parameters at 0.5 elevation and 20 range bins mean around the representative stations for the two extreme flash heavy rain
站点 | 北京时 | ZH /dBZ | ZDR/dB | KDP/[(°)·km-1] | CC | ||||
---|---|---|---|---|---|---|---|---|---|
范围 | 均值 | 范围 | 均值 | 范围 | 均值 | 范围 | 均值 | ||
王庄集附近 | 8月5日07:16 | 53.0~58.0 | 56.2 | 1.0~1.8 | 1.4 | 2.7~3.6 | 3.1 | 0.96~0.99 | 0.98 |
大安站附近 | 8月6日19:22 | 47.0~54.0 | 50.8 | 1.1~2.5 | 1.8 | 2.0~3.5 | 2.9 | 0.96~0.99 | 0.98 |
新兖和兴隆庄附近 | 8月6日19:22 | 50.0~56.5 | 53.5 | 1.2~4.5 | 2.9 | 3.1~6.4 | 4.8 | 0.91~0.99 | 0.97 |
Fig.4 Vertical cross-section(VCS) of ZH (a, Unit: dBZ), ZDR (b, Unit: dB), KDP (c,Unit:(°)·km-1), CC (d),V(e,m·s-1), and VCS of ZH (Unit: dBZ) overlying ZDR, KDP, CC and zero velocity isoline from Ji'nan radar at 07:16 on 5 August 2020 (The blue solid, dash and dotted isolines are 45, 50 and 55 dBZ isoline of ZH respectively; the pink, red and blue isolines are the heights of 0 ℃, -10 ℃ and -20 ℃ layers respectively; the red isoline is 1 dB isoline of ZDR, the yellow isoline is 1.00(°)·km-1 isoline of KDP, the white isoline is 0 m·s-1 isoline of V in Fig.4(f). The same as below)
Fig.5 Vertical cross-section(VCS) of ZH (a, Unit: dBZ), ZDR (b, Unit: dB), KDP (c, Unit:(°)·km-1), CC (d),V(e,Unit:m·s-1), and VCS of ZH (Unit: dBZ) overlying ZDR, KDP, CC and zero velocity isolines from Ji'nan radar at 19:22 on 6 August 2020
北京时 | 风暴 | -10 ℃层高度以上 | -10~0 ℃层高度 | 0 ℃层高度以下 | 特征高度/km | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ZH/dBZ | ZDR/dB | KDP/ [(°)· km-1] | ZH/dBZ | ZDR/dB | KDP/ [(°)·km-1] | ZH/dBZ | ZDR/dB | KDP/ [(°)·km-1] | ZDR柱 | KDP柱 | 45 dBZ顶 | ||
8月5日07:16 | 王庄集风暴 | <55 | ≈0 | <1.5 | 45~59 | 0.3~1.6 | 0.5~2.5 | 45~61 | 1.0~2.7 | 0.5~3.8 | 8.1 | 8.7 | 11.7 |
8月6日19:22 | 大安风暴 | <45 | 0.2~1.0 | <1.0 | 40~52 | 0.5~1.7 | 0.5~2.5 | 45~55 | 1.0~2.6 | 0.5~3.7 | 8.2 | 7.9 | 8.8 |
Tab.3 Vertical structural characteristics for Wang Zhuangji and Da'an storms
北京时 | 风暴 | -10 ℃层高度以上 | -10~0 ℃层高度 | 0 ℃层高度以下 | 特征高度/km | ||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|
ZH/dBZ | ZDR/dB | KDP/ [(°)· km-1] | ZH/dBZ | ZDR/dB | KDP/ [(°)·km-1] | ZH/dBZ | ZDR/dB | KDP/ [(°)·km-1] | ZDR柱 | KDP柱 | 45 dBZ顶 | ||
8月5日07:16 | 王庄集风暴 | <55 | ≈0 | <1.5 | 45~59 | 0.3~1.6 | 0.5~2.5 | 45~61 | 1.0~2.7 | 0.5~3.8 | 8.1 | 8.7 | 11.7 |
8月6日19:22 | 大安风暴 | <45 | 0.2~1.0 | <1.0 | 40~52 | 0.5~1.7 | 0.5~2.5 | 45~55 | 1.0~2.6 | 0.5~3.7 | 8.2 | 7.9 | 8.8 |
Fig.6 Radial velocity at 1.5° (a), 6.0° (b) elevations at 07:16 on 5 and at 1.5°(c), 3.3°(d) elevations at 19:22 on 6 and vertical section of radial velocity at 19:22 on 6 (e) August 2020 (Unit: m·s-1) (The vertical section is along dotted line in Fig.3(e))
Fig.7 Time-height cross sections of ZH (Unit: dBZ)(a, b), ZDR (Unit: dB)(c,d), KDP (Unit:(°)·km-1)(e, f) and CC (g, h) at Wangzhuangji station from 06:30 to 08:00 on 5 (a, c, e, g) and Da'an station from 18:30 to 20:00 on 6 (b, d, f, h) August 2020
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