Satellite Image Characteristics and Formation Mechanisms of Newborn Thunderstorms in Eastern QinghaiXizang Plateau
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Abstract:
Based on the FY2D/E satellite and thunderstorm data in summer from 2010 to 2014, the satellite image characteristics of newborn thunderstorms and their formation mechanisms in the Eastern QinghaiXizang Plateau are analyzed. The results show that the satellite image characteristics of thunderstorms have obvious features, and the cloud top, which has a high correlation with altitude, is below the tropopause. In general, the TBB of the IR channel (IR1) often ranges from -55 ℃ to -10 ℃, and the TBB of the vapor channel (IR3) has a high frequency from -50 ℃ to -30 ℃. The TBB difference between IR2 (TBB of the splitwindow channel) and IR1 has a high frequency around -33 ℃, and the TBB difference between IR3 and IR1, which is greater than 0 ℃, reaches 83%. In addition, the differences between the surface and air temperature often appear from 5 ℃ to 15 ℃, while the surface temperature is basically from 25 ℃ to 30 ℃ and the relative humidity between 40% to 55% and 30% to 50% in regions Ⅰand Ⅱ. But the differences between the surface and air temperature often range from 5 ℃ to 10 ℃, and the surface temperature is concentrated mainly from 30 ℃ to 35 ℃ in the Ⅲ region. The differences between the surface and air temperature, surface temperature, and relative humidity conditions are reasonable and can be good indicators of newborn thunderstorms in the eastern QinghaiXizang Plateau.
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Supported by:Beijing E-Tiller Technology Development Co., Ltd.
Supported by:Beijing E-Tiller Technology Development Co., Ltd.