大气科学2018，Vol.42Issue(2)：292-300,9.DOI:10.3878/j.issn.1006-9895.1707.17115
基于地面短波辐射观测资料计算淡积云的辐射强迫及水平尺度方法研究
Estimation of Radiative Forcing and Chore Length of Shallow Convective Clouds (SCC) Based on Broadband Pyranometer Measurements
摘要
Abstract
We presented a method to identify and calculate cloud radiative forcing (CRF) and horizontal chore length (L) of shallow convective clouds (SCC) using broadband pyranometer measurements. The data analyzed were collected from the SCC campaign during two summers (2015–2016) at Baiqi site over the Inner Mongolia grassland. The SCC detection method was verified against observations from reports and cameras records. It was found that the results of the detection method and human observations were in agreement by about 75%. The deviation of L can be attributed to following factors: 1) the accuracy of wind speed at the height of SCC and the ratio of horizontal to vertical length play a key role in determining the value of L; 2) the effect of variance in solar zenith angle can be negligible. The downwelling shortwave CRF of SCC was ?134.1 W m?2. The average value of L of SCC was 1129 m. Besides, the distribution of normalized cloud chore length agreed well with a power-law distribution.关键词
淡积云/水平尺度/辐射强迫/辐射表Key words
Shallow convective clouds/Horizontal chore length/Radiative forcing/Pyranometer分类
天文与地球科学引用本文复制引用
施红蓉,陈洪滨,夏祥鳌,范学花,张金强,曹杨,朱彦良,王姝..基于地面短波辐射观测资料计算淡积云的辐射强迫及水平尺度方法研究[J].大气科学,2018,42(2):292-300,9.基金项目
国家自然科学基金面上基金项目41775005、41275039、41675034 （）
国家重点研发计划资助2017YFA0603504 （）
国家电网科技项目资助,National Science Foundation of China (NSFC) (Grants 41775005, 41275039, 41675034), National Key R&D Program of China (Grant 2017YFA0603504), Science and Technology Project of State Grid Corporation of China （NSFC）
