| Meteorological disasters caused by global warming are increasing year by year.Among them,disasters caused by hourly precipitation account for a larger proportion.The use of high-resolution precipitation data can better reflect the characteristics of the precipitation process.At the same time,the sub-scale study of hourly precipitation is conducive to understanding the correlation between weather and climate in climate.The characteristics of atmospheric motion caused by different weather processes can supplement the current climate analysis and help to refined research on climate change.This paper uses the hourly precipitation data of China's automatic station and CMORPH precipitation products to explore the rationality of this precipitation products in eastern China,and the temporal and spatial distribution characteristics of different grades of precipitation and different durations of precipitation,and use CERES cloud data and Cloud Sat Satellite data analyzes the correlation between precipitation and cloud characteristics.Focus on the characteristics of different grades of precipitation and its distribution in the precipitation process,as well as the relationship between different grades of precipitation and the cloud macroscopic characteristic structure.The results show:(1)The fusion precipitation data has denser automatic station station data,with higher spatial resolution,and CMORPH satellite data is corrected in areas where station data is sparse,compared to the data that is interpolated into the coarse grid of the precipitation observed at a single station.It is more able to identify small-scale and small-scale precipitation processes.(2)Regarding the rainfall hours of all levels of rainfall,the light rain and moderate rain hours are the most significant in eastern China,and the contribution of moderate rain is the main one.Heavy rains and above are mainly distributed in southern China and the eastern coastal areas.The precipitation process is mainly a short-term precipitation process of 1-6h,which decreases with the increase of the precipitation duration.The contribution of precipitation in South China and the Jianghuai region changed from winter to summer from long duration to shorter duration;in Northeast and North China,the seasonal difference is very obvious,and the precipitation is mainly concentrated in the short duration of 3-4h in summer.Light rain precipitation has the largest number of hours in the precipitation of each duration in each season.However,due to the small precipitation intensity,the contribution rate of the increase with the precipitation duration decreases.From winter to summer,the proportion of each time period decreases;the time period of moderate rain mainly occurs in the middle In the long-term precipitation process;the heavy precipitation times above 10mm/h are mainly distributed in the medium-and long-term precipitation process.(3)With the increase of precipitation intensity,cloud cover,optical thickness and ice water path increase,and liquid water path contains more in moderate rain.If the height of the cloud top is the same,and the height of the cloud top is the same,the precipitation of moderate rain and heavy rain with greater precipitation intensity will develop to more than 14km.The lower the cloud base height,the thicker the cloud layer,the easier it is to produce more intense precipitation.When the height of the cloud base is below 2km and the thickness of the cloud layer is 8km and above,precipitation is produced.As the height of the cloud top increases,the intensity increases.The content of ice particles in the cloud can produce less intense precipitation up to 200mg·m-3,and the content of ice particles must reach more than400mg·m-3and the radius of ice particles should reach more than 1000?m during the process of producing more intense moderate rain and heavy rain. |
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