Spatial and Temporal Features of the Frequency of Cloud Occurrence over China Based on CALIOP
Spatial and Temporal Features of the Frequency of Cloud Occurrence over China Based on CALIOP
复制标题
基于CALIOP的中国云出现频率时空特征
DOI：
10.1155/2017/4548357
复制
发表时间：
2017
影响因子：
2.9
通讯作者：
Tie Xin
中科院分区：
文献类型：
--
作者：
Cai Hongke;Feng Xiao;Chen Quanliang;Sun Yi;Wu Zhengmin;Tie Xin
云垂直结构的时空分布是全球气候变化的重要组成部分。利用1 km分辨率的正交偏振云-气溶胶激光雷达（CALIOP）的云层产品，计算了中国及周边地区的云层出现情况。结果表明，云出现的频率有显着的区域差异。蒙古高原和北方印度半岛上空的云层较少，热带海域和中国南部的云层较多。夜间的云量略高于白天。在大多数地区，单层云比多层云更常见。在大多数地区，高层云占单层云的比例最大。夏、秋两季出现云量一般大于春、冬两季。蒙古高原和北方印度半岛上空的单层云比多层云少，尤其是在冬季。此外，在中国西南地区东部，一年四季都有单层云。在夏季青藏高原部分地区，由于地形和夏季对流的增强，高云占全年单层云的最大比例（>35%）。
Spatial and temporal distribution of cloud vertical structure are key components of global climate change. The occurrence of clouds over China and its surrounding areas has been calculated based on cloud layer products from the Cloud-Aerosol Lidar with Orthogonal Polarization (CALIOP) at 1 km resolution. Results show significant regional differences in the frequency of cloud occurrence. Fewer clouds are found over the Mongolian Plateau and northern Indian Peninsula, with more clouds apparent over tropical seas and southern China. Cloud cover at night is slightly higher than during the day. Single-layer clouds are more common than multilayer clouds in most areas. In most areas, high-level cloud accounts for the largest proportion of single-layer clouds. The occurrence of clouds in summer and autumn is generally greater than in spring and winter. Single-layer clouds over the Mongolian Plateau and northern Indian Peninsula occur less frequently than multilayer clouds, especially in winter. Furthermore, single-layer clouds are common over the eastern part of southwest China all year round. Over parts of the Tibetan Plateau in summer, high clouds account for the largest proportion (>35%) of annual single-layer clouds, as a result of topography and enhanced summer convection.