基于卫星遥感的祁连山及甘肃中部地区云宏观特征

doi:10.13866/j.azr.2019.03.23

Abstract

Abstract: In this study,the CloudSat and CALIPSO satellite remote sensing data from 2007 to 2010 and the precipitation data provided by China National Meteorological Information Center (CMDC) from 1996 to 2016 were used to analyze the macroscopic characteristics of different cloud types over the Qilian Mountains,central Gansu Province and the Shiyang River Basin.The results showed that the seasonal variation of total cloud fraction over the each research area was consistent,and its high values occurred mostly in spring and summer.The areas with high values of total cloud fraction were mainly located in the southern slope of the Qilian Mountains as those with high values of precipitation.The maximum value of cumulus cloud fraction occurred in summer,and the precipitation frequency of cumulus cloud was higher than that of stratiform cloud.Single-layer cloud was dominant,and its thickness was over 2.0 km.The maximum thickness of single-layer cloud over central Gansu was 3.0 km in spring.The thickness of two-layer clouds was thicker than that of three-layer clouds.Cumulus cloud and single-layer cloud producing precipitation occurred more frequently.The distribution trend of cloud frequency with the height over each research area was similar,the altitude of stratiform cloud ranged from 0.5 km to 12.0 km in altitude,and the peak frequency appeared around 6.0 km in altitude.The distribution altitude of cumulus cloud frequency was obviously lower than that of stratiform cloud,and the peak value occurred around 1.5 km in altitude.

Key words: cloud, precipitation, CloudSat, CALIPSO, Qilian Mountains, Gansu

SONG Qi-ming, ZHANG Wu, SU Ya-qiao, CHEN yan, YANG Kun, ZHAO Gui-qing, CAO Gang. Cloud Macro-Features over the Qilian Mountains and Central Gansu Based on Satellite Remote Sensing[J].Arid Zone Research, 2019, 36(3): 712-722.

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Cloud Macro-Features over the Qilian Mountains and Central Gansu Based on Satellite Remote Sensing

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