Environmental Parameter Characteristics of Severe Wind with Extreme Thunderstorm

Ma Shuping; Wang Xiuming; Yu Xiaoding

doi:10.11898/1001-7313.20190304

Vol.30, NO.3, 2019

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Ma Shuping, Wang Xiuming, Yu Xiaoding. Environmental parameter characteristics of severe wind with extreme thunderstorm. J Appl Meteor Sci, 2019, 30(3): 292-301. DOI: 10.11898/1001-7313.20190304.

Citation:

Ma Shuping, Wang Xiuming, Yu Xiaoding. Environmental parameter characteristics of severe wind with extreme thunderstorm. J Appl Meteor Sci, 2019, 30(3): 292-301. DOI: 10.11898/1001-7313.20190304.

Ma Shuping, Wang Xiuming, Yu Xiaoding. Environmental parameter characteristics of severe wind with extreme thunderstorm. J Appl Meteor Sci, 2019, 30(3): 292-301. DOI: 10.11898/1001-7313.20190304.

Citation:

Ma Shuping, Wang Xiuming, Yu Xiaoding. Environmental parameter characteristics of severe wind with extreme thunderstorm. J Appl Meteor Sci, 2019, 30(3): 292-301. DOI: 10.11898/1001-7313.20190304.

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Environmental Parameter Characteristics of Severe Wind with Extreme Thunderstorm

DOI: 10.11898/1001-7313.20190304

1.
Chinese Academy of Meteorological Sciences, Beijing 100081
2.
China Meteorological Administration Training Center, Beijing 100081

Received Date: 2019-01-29
Rev Recd Date: 2019-03-21
Publish Date: 2019-05-31

Abstract

Abstract

Cases of severe wind with extreme thunderstorm and ordinary thunderstorm without strong convection in various regions of China are analyzed to study characteristics of environmental element of the severe wind, and 95 cases are selected for each type from 2002 to 2017. The comparison of key environmental parameters of severe wind with extreme thunderstorm and ordinary thunderstorm reveal the key environmental parameter characteristics. Results show that severe wind occurs in a relatively dry environment in the middle troposphere. The single-layered maximum depression of dew point of severe wind is 25.7℃ and the average depression of dew point is 13.6℃ when those of ordinary thunderstorm are 16.2℃ and 6.5℃, respectively. Differences between their ground dew point temperature are not significant, when the mean ground dew point temperature of severe wind is 20.2℃, and the mean of ordinary thunderstorm is 21℃. However, the average precipitable water of the former is 37 mm, significantly lower than that of the latter which is 51 mm due to the discrepancy in moisture layer. The moisture layer thickness of the former is below 2 km in most of cases, obviously shallower than the average thickness of ordinary thunderstorm moisture layer, which is 3.6 km. The mean vertical temperature lapse rate in the middle and lower troposphere of severe wind is larger than that of ordinary thunderstorm. Its average temperature difference between 850 hPa and 500 hPa is 28.2℃, obviously larger than that of ordinary events, which is 23.3℃. At the same time, as the ground dew point temperature is not much different, the mean convective available potential energy of severe wind is 1820 J·kg^-1, larger than the average of ordinary thunderstorm which is only 470 J·kg^-1. The convective inhibition for two types of thunderstorms are not significantly different, the average convective inhibition of severe wind is 79 J·kg^-1, comparing to 55 J·kg^-1 of ordinary thunderstorms. 0-6 km vertical wind shear of severe wind is 18.1 m·s^-1 and 0-3 km vertical wind shear is 13.2 m·s^-1 comparing to 14.3 m·s^-1 and 10.5 m·s^-1, respectively. The convective available potential energy of downdraft of severe wind is larger whose average value is 1110 J·kg^-1 while the mean convective available potential energy of downdraft of ordinary thunderstorm is 620 J·kg^-1. And the median entrainment zone mean wind speed of severe wind is 14 m·s^-1. It is slightly larger than that of ordinary thunderstorm, which is 12 m·s^-1. In addition, there is also discrepancy in the height of characteristic layer of severe wind with extreme thunderstorm and ordinary thunderstorm, such as 0℃ layer, -20℃ layer, and the lifting condensation level.
- severe wind;
- ordinary thunderstorm;
- comparison of key environmental parameters

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References(47)

Figures and Tables

图 1 2002—2017年极端雷暴大风和普通雷暴出现频次

Fig. 1 Frequency of severe wind with extreme thunderstorm and ordinary thunderstorm from 2002 to 2017

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图 2 2002—2017年中国极端雷暴大风的空间分布(a)和普通雷暴的空间分布(b)

Fig. 2 Spatial distribution of severe wind with extreme thunderstorm(a) and ordinary thunderstorm(b) in China from 2002 to 2017

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图 3 极端雷暴大风与普通雷暴的地面露点(a)、大气可降水量(b)和湿层厚度(c)箱线图

(线段最高点为统计最大值，最低点为统计最小值，箱线上部框线为第75百分位值，箱线下部框线为第25百分位值，箱内线为平均值，+为中位数)

Fig. 3 Box line diagram of ground dew point(a), precipitable water(b) and moisture layer(c) of severe wind with extremem thunderstorm and ordinary thunderstorm

(the highest point is the statistical maximum, the lowest point is the statistical minimum, the box upper frame line is the 75th percentile threshold value, the lower frame line is the 25th percentile threshold value, line inside box is the average, + is the median)

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图 4 极端雷暴大风与普通雷暴850 hPa与500 hPa温差(a)、对流有效位能(b)和对流抑制能量(c)箱线图

Fig. 4 Box line diagram of the distribution of temperature difference between 850 hPa and 500 hPa(a), convective available potential energy(b) and convective inhibition(c) of severe wind with extreme thunderstorm and ordinary thunderstorm

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图 5 极端雷暴大风与普通雷暴的0~1 km，0~3 km和0~6 km垂直风切变箱线图

Fig. 5 Box line diagram of vertical wind shear of severe wind with extreme thunderstorm and ordinary thunderstorm

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图 6 极端雷暴大风与普通雷暴的对流层中下层平均温度露点差(a)和最大温度露点差(b)箱线图

Fig. 6 Box line diagram of average depression of dew point(a) and maximum depression of dew point(b) at middle and lower troposphere of severe wind with extreme thunderstorm and ordinary thunderstorm

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图 7 极端雷暴大风与普通雷暴850 hPa与500 hPa假相当位温差箱线图

Fig. 7 Box line diagram of the potential pseudo- equivalent temperature between 850 hPa and 500 hPa of severe wind with extreme thunderstorm and ordinary thunderstorm

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图 8 极端雷暴大风与普通雷暴的下沉有效位能箱线图

Fig. 8 Box line diagram of convective available potential energy of downdraft of severe wind with extreme thunderstorm and ordinary thunderstorm

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图 9 极端雷暴大风与普通雷暴的夹卷层平均风速箱线图

Fig. 9 Box line diagram of entrinment zone mean wind of severe wind with extreme thunderstorm and ordinary thunderstorm

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图 10 极端雷暴大风与普通雷暴的0℃层高度(a)、-20℃层高度(b)和抬升凝结高度(c)箱线图

Fig. 10 Box line diagram of the distribution of height of 0℃ layer(a), height of -20℃ layer(b) and lifting condensation level(c) of severe wind with extreme thunderstorm and ordinary thunderstorm

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