基于FY-4A和气象条件的梵净山云海识别及特征分析  

Identification of Cloud Sea of Mount Fanjing and Characteristic Analysis Based on FY-4A and Meteorological Conditions

作　　者：李光一 田鹏举 陈远航 谷晓平 段莹 廖留峰 LI Guangyi;TIAN Pengju;CHEN Yuanhang;GU Xiaoping;DUAN Ying;LIAO Liufeng(Guizhou Ecological Meteorology and Satellite Remote Sensing Center,Guiyang 550002,China;Guizhou Chuyun Environmental Protection Technology,Guiyang 550081,China)

机构地区：[1]贵州省生态气象和卫星遥感中心,贵阳550002 [2]贵州楚云环保科技有限公司,贵阳550081

出　　处：《西南大学学报（自然科学版）》2023年第6期174-181,共8页Journal of Southwest University(Natural Science Edition)

基　　金：贵州省高层次创新型人才项目(黔科合平台人才[2016]4026);中国气象局风云卫星应用先行计划项目(FY-APP-2021.0208);贵州省企业基金项目(QHLQLJ[2022]-01).

摘　　要：探究云海的时间变化特征,能够为当地生态旅游以及经济发展提供科学参考.以梵净山为例,基于FY-4A的云顶高度产品获取了有效的云顶高度数据,并分别按不同的判别规则提取梵净山景区范围内的云海日与金顶周边的可观赏性云海日,分析其季、月、时段的变化特征以及与温度和湿度的相关关系,并基于以上结果调取地面视频监测资料开展验证工作.结果表明:①2020年梵净山出现云海的天数总计85 d,月均7 d,其中在金顶周边可观赏到的云海天数为62 d,占云海总日数72.9%,月均5 d;②无论是云海还是可观赏性云海,季节特征为“春秋多,夏冬少”,其中可观赏性云海主要集中在2-4月,凌晨4点至上午8点期间频率最高;③当相对湿度高且平均温度较低时,云海形成的概率较高,当相对湿度过高或者平均温度过低时云海均不易形成.因此,山间冬末春初时节,湿度增加,水汽充足,清晨与傍晚极易形成云海景观,是前往梵净山观赏云海的最佳时期.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:①In 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.②No 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.③Under 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.

关 键 词：FY-4A卫星 云海 云顶高度 气象条件 梵净山 

分 类 号：P49[天文地球—大气科学及气象学]