干旱区地理2017，Vol.40Issue(4)：754-761,8.
层状云微物理属性垂直分布的季节变化——以新疆地区为例
Vertical distribution and its seasonal variation of microphysical properties of stratiform clouds in Xinjiang
摘要
Abstract
Xinjiang has a typical temperate continental climate and complex topography with large diurnal temperature difference.The spatial and temporal distribution of precipitation is extremely uneven due to various factors of climate and terrain,which accelerated the water shortages in the Xinjiang.Studies have found that stratiform cloud shows a great potential on artificial enhancement precipitation,however,due to lacks of observation measurements,few researches focused on the vertical distribution of stratiform clouds.CloudSat is the first satellite,which can observe the vertical distribution of worldwide cloud microphysical properties by using active millimeter-wave radars.In this paper,based on the retrieval data 2B-CLDClASS and 2B-CWC-RVOD from cloud profiling radar onboard CloudSat satellite,stratiform clouds that contained stratus and stratocumulus appeared in Xinjiang during 2009-2010 were chosen to reveal the vertical distribution of stratiform cloud microphysical properties including the equivalent radius of ice particles and water cloud particles,the concentration of ice particle and water cloud particle,the content of ice water and liquid water and its seasonal variation.Results show that the ice water and liquid water were distributed in 1.0-11.0 km and 0-9.0 km respectively in the stratus clouds,while in 0-9.0 km in the stratocumulus clouds.The effective radius of ice particles in both stratocumulus and stratus decreased with the height of cloud.The maximums of ice effective radius were 106.4 μm and 70.8 μm respectively appeared in the bottom of clouds.The water cloud particles effective radius of stratocumulus was larger than stratus',with the high value both appeared in the lower cloud layer,and the maximums were 15.7μma and 12.5 μm respectively.The ice number concentration in stratocumulus increased with the increase of cloud height,the maximum was 76.4 L-1 distributed in 8.0-9.0 km;while the ice number concentration in stratus increased with height ranging from 0 to 9.0 km.The number concentration of water cloud particle decreased with the increase of height of both stratocumulus and stratus.The water cloud particle number concentration in stratocumulus was greater than in stratus ranging from 1.0 to 6.0 km,but lower than in stratus in the top of the cloud layer ranging from 6.0 to 9.0 km and in the bottom.The peak of ice water content value in stratocumulus appeared in 7.0-8.0 km,which was 50.3 mg· m-3,and the peak of ice water content of stratus occurred in 8.0-9.0 km,which was 25.1 mg· m-3.The liquid water content of stratocumulus,which was up to 500.4 mg· m-3,was much greater than stratus' when they appeared in range from 0 km to 7.0 km.From this perspective,stratocumulus clouds were more suitable for artificial cloud-seeding.Stratus and stratocumulus clouds occurred more frequently in the spring,summer and autumn but less in winter,especially stratocumulus clouds.The height of stratus clouds was higher than those of stratocumulus clouds,particularly in spring,stratus clouds were extended to 11.0 km.The maximum height of stratocumulus clouds was 8.0km in summer.关键词
CloudSat卫星/层状云/微物理属性/垂直分布/季节变化Key words
CloudSat satellite/stratiform clouds/microphysical properties/vertical distribution/seasonal variation分类
天文与地球科学引用本文复制引用
光莹,邓军英,陈勇航,辛渝,孙冉,王旭,杨莲梅,刘岩,张瑞..层状云微物理属性垂直分布的季节变化——以新疆地区为例[J].干旱区地理,2017,40(4):754-761,8.基金项目
新疆维吾尔自治区人民政府项目(TUHA201401) （TUHA201401）
科技部公益性行业(气象)科研专项项目(GYHY201506009) （气象）
中国沙漠气象科学基金(Sqj2012002) （Sqj2012002）
国家自然科学基金项目(41175026、41565003) （41175026、41565003）
