LI Guangyi;TIAN Pengju;CHEN Yuanhang;GU Xiaoping;DUAN Ying;LIAO Liufeng;Guizhou Ecological Meteorology and Satellite Remote Sensing Center;Guizhou Chuyun Environmental Protection Technology;

FY-4A satellite;;Cloud Sea;;cloud top height;;meteorological conditions;;Mount Fanjing

Exploring the tempol variation characteristics of Cloud Sea can provide scientific reference for local ecotourism and economic development. Taking Mount Fanjing as an example, This study uses Python for batch preprocessing to obtain effective data of cloud top height based on the FY-4A, and extracts Cloud Sea days within the whole region of Mount Fanjing scenic area and the viewable Cloud Sea days around Jinding according to different procedures. The variation characteristics of Cloud Sea in different seasons, months, and time periods, as well as correlation with the main meteorological elements were analyzed and verified based on the ground video monitoring data. The results show that:(1) In 2020, the number of Cloud Sea day was 85, with average 7 days per month. Among which, the number of Cloud Sea days around Jinding was 62, accounting for 72.9% of the total Cloud Sea days, with average 5 days per month.(2) No matter it is a Cloud Sea or a viewable Cloud Sea, the seasonal characteristics were realized as “more occurred in spring and autumn, less occurred in summer and winter”. The viewable Cloud Sea were mainly appeared from February to April, with the highest frequency from 4:00 am to 8:00 am.(3) Under the higher relative humidity and the lower average temperature, the probability of Cloud Sea appearing is higher. When the relative humidity was very high or the average temperature is very low, the Cloud Sea is not easy to form. Therefore, in the late winter and early spring in the mountains, with the suitable humidity and the sufficient water vapor, it is easy to form viewable Cloud Sea in the early morning and evening, which is the best time to visit Mount Fanjing to enjoy the beautiful view.