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气象:2023,49(2):170-177
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激光云高仪探测中国东南沿海云分布特征
蔡云萍,罗昌荣,陈赛,王证帅,吕巧谊,黄澎
(厦门市气象灾害防御技术中心,厦门 361012; 厦门市气象局,厦门 361012; 厦门市海峡气象开发重点实验室,厦门 361012)
Observation of Cloud Characteristics with Ceilometer in the Southeast Coast of China
CAI Yunping,LUO Changrong,CHEN Sai,WANG Zhengshuai,LYU Qiaoyi,HUANG Peng
(Xiamen Meteorological Disaster Prevention Technology Center, Xiamen 361012; Xiamen Meteorological Bureau, Xiamen 361012; Xiamen Strait Meteorological Development Key Laboratory, Xiamen 361012)
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投稿时间:2021-11-01    修订日期:2022-06-06
中文摘要: 利用Vaisala CL51 激光云高仪对厦门地区2016年1月1日至2020年12月31日5年的云探测数据,采用时间占比算法计算出云分数,并对云层、云高以及云分数分布规律进行统计分析。结果表明:中国东南沿海云层结构以单层云为主(占比43.59%),双层云为辅(占比16.42%),三层以上云出现的概率相对较低(占比5.25%)。观测期间以中低云为主,与其他季节相比,夏季的云分布密度的集中度较小,存在较大云底间距。高云更可能出现在18时至次日06时的时段内,夏季尤为显著,表现出明显的日变化特征。
Abstract:In order to study the cloud characteristics of the southeast coast of China, a laser ceilometer CL5 by Vaisala was used to detect cloud characteristics in Xiamen from 1 January 2016 to 31 December 2020. By using the time proportion algorithm to calculate the cloud fraction, this paper analyzes the distributions of cloud layers, cloud-base height and cloud fraction via data analysis method. The results show that the cloud structure in the southeast coast of China is dominated by single-layer clouds (43.59%), supplemented by double-layer clouds (16.42%), and the probability of occurrence of clouds with more than three layers is rare (5.25%). During the observation period, there were mainly low- and mid-level clouds. Compared with that in other seasons, the concentration of cloud distribution density in summer is smaller, and the cloud-base height difference between the lowest layer cloud and the highest layer cloud is larger. High clouds are more likely to occur between 18:00 BT and 06:00 BT, especially in summer, showing the characteristics of obvious diurnal variation.
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基金项目:国家自然科学基金青年基金项目(41805028)和厦门市青年创新基金项目(3502Z20206078)共同资助
引用文本:
蔡云萍,罗昌荣,陈赛,王证帅,吕巧谊,黄澎,2023.激光云高仪探测中国东南沿海云分布特征[J].气象,49(2):170-177.
CAI Yunping,LUO Changrong,CHEN Sai,WANG Zhengshuai,LYU Qiaoyi,HUANG Peng,2023.Observation of Cloud Characteristics with Ceilometer in the Southeast Coast of China[J].Meteor Mon,49(2):170-177.