东亚夏季对流云顶黑体辐射温度的频率分布及其日变化
GEOGRAPHIC DISTRIBUTION AND DIURNAL VARIATION OF THE FREQUENCY OF CONVECTIVE CLOUD-TOP BLACK BODY TEMPERATURE OVER EASTERN ASIA SUMMER
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摘要: 应用逐时GMS-5卫星红外云图云顶黑体辐射温度TBB资料,对1998~2000年夏季(6、7、8月)东亚地区各网格点的TBB按TBB≤-32℃及TBB≤-52℃这两个对流云顶阈值范围出现的频率进行了统计。结果表明,对流云顶TBB阈值出现的频率分布可以客观地揭示对流的地理分布和日变化特征。Abstract: The frequencies of different threshold values for the convective cloud-top black body temperature (TBB) were calculated in the East Asia region using the hourly infrared data of GMS during 1998~2000 summer (June, July and August). The results showed that the distribution of the frequencies in the thresholds of TBB≤-32℃ and TBB≤-52℃ could objectively exhibite the geographic distribution and the diurnal variations of convection in the East Asia.
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Key words:
- satellite image /
- convection /
- diurnal variation
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