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高原气象  2018, Vol. 37 Issue (3): 777-785    DOI: 10.7522/j.issn.1000-0534.2018.00057
论文     
基于卫星资料的秦岭南北云系及其垂直结构特征
位晶, 段克勤
陕西师范大学地理科学与旅游学院, 陕西 西安 710000
Analysis of Cloud System and Its Vertical Structure between the Southern and Northern Qinling Based on Satellite Data
WEI Jing, DUAN Keqin
School of Geography and Tourism, Shaanxi Normal University, Xi'an 710000, Shaanxi, China
 全文: PDF 
摘要: 利用2007-2010年CloudSat/CALIPSO联合产品2B-CLDCLASS-LIDAR资料对关中、秦岭和陕南云出现概率及云垂直结构特征进行了研究。结果表明,各地区四季均以云天为主,云出现概率从南到北逐渐减少,但云出现概率最高的月份北部要早于南部。秦岭南北云层高度的季节变化单层云中关中地区最为显著,多层云则是陕南地区。云厚季节变化不明显,均在1~3 km之间。除少数情况外,8大云类在各地区不同云层中的出现概率具有显著的季节变化。除Ns(雨层云)在三层云下层及Dc(深对流云)在各层云中云顶和云厚存在明显的区域差异外,所有云类的云底云顶高度及平均厚度在不同云层的出现概率均没有明显的季节变化和区域差异。
关键词: CloudSat卫星秦岭云出现概率云垂直结构    
Abstract: The relationship between cloud and climate is very complex. In order to quantitatively understand the feedback effect of clouds on the climate and improve the climate model, it is necessary to determine the cloud's global or local distribution and its internal structural characteristics under different dynamic conditions. Seasonal variations of cloud occurrence frequency and cloud vertical structures in Guanzhong, Qinling and Shannan regions from 2007 to 2010 were studied by using CloudSat/CALIPSO joint product. The results showed that the four seasons in all regions are dominated by cloud-days, the total cloud occurrence frequency is high in the south, but low in the north, and gradually decreases from south to north. However, the month with the highest total cloud occurrence frequency shows earlier in the north than in the south. The highest value of cloudtop/cloudbase height is in the south and the lowest value is in the north. Seasonal variation of cloudlayer height in the north and south of the Qinling Mountains, Guangzhong region is the most significant in single-layer cloud, while Shannan in the multi-layer cloud. The thickness of clouds in each region is 1~3 km, and slightly higher in summer and autumn than in spring and winter. There is no obvious seasonal changes in cloud thickness. In the single-layer cloud, Ci, As, and Sc occupy a considerable proportion, and Ac, Cu, and Dc occupy a certain proportion, while St and Ns have the smallest proportion. In the lower layers of two-layer clouds, Sc is the dominant type. Ci, As, Ns, and Dc decrease in all regions, while Ac, St, and Cu increase. In the lower layers of the three-layer cloud, Ac, Sc, and Cu are predominant, and Ns is the least. The middle layer is dominated by Ci, As, and Ac, and other clouds are rare. In the upper layer of multi-layer clouds, Ci occupies a higher proportion. In short, except for a few cases, occurrence frequency of eight major clouds in different regions has significant seasonal variations. Except for the obvious regional differences of the cloudtop height and cloud thicknesses of the Ns in the lower three-layer cloud and of the cloudtop height, cloutbase height and cloud thickness of the Dc in each cloudlayer, there is no obvious seasonal variation or regional difference in the cloudbase height, cloudtop height and average thicknesses of clouds in different cloudtype. These results provide insights into the nature of precipitation and formation mechanisms of precipitation in the region, and provide scientific basis for rational implementation of water resources deployment.
Key words: CloudSat satellite    Qinling    cloud occurrence frequency    vertical structure of clouds
收稿日期: 2017-11-29 出版日期: 2018-06-24
ZTFLH:  P426.5  
基金资助: 国家自然科学基金项目(41771030,41571062)
通讯作者: 段克勤(1970),男,甘肃平凉人,教授,主要从事全球变化的研究.E-mail:kqduan@snnu.edu.cn     E-mail: kqduan@snnu.edu.cn
作者简介: 位晶(1993),女,河南驻马店人,硕士研究生,主要从事资源开发与环境演变研究.E-mail:wei931203@163.com
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位晶, 段克勤. 基于卫星资料的秦岭南北云系及其垂直结构特征[J]. 高原气象, 2018, 37(3): 777-785.

WEI Jing, DUAN Keqin. Analysis of Cloud System and Its Vertical Structure between the Southern and Northern Qinling Based on Satellite Data. Plateau Meteorology, 2018, 37(3): 777-785.

链接本文:

http://www.gyqx.ac.cn/CN/10.7522/j.issn.1000-0534.2018.00057        http://www.gyqx.ac.cn/CN/Y2018/V37/I3/777

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