ASC200型地基双波段全天空云量自动观测仪云量比对分析  

Cloud Cover Comparative Analysis Based on Ground-based Dual-band All-sky Imager ASC200

作　　者：温强 陶法 刘达新[1] 胡树贞[1] 王依人 WEN Qiang;TAO Fa;LIU Daxin;HU Shuzhen;WANG Yiren(CMA Metrological Observation Center,Beijing 100081;Nanjing University of Information Science Technology,Nanjing 210044;Key Laboratory of Atmospheric Optics,Anhui Institute of Optics and Fine Mechanics,Hefei 230088)

机构地区：[1]中国气象局气象探测中心,北京100081 [2]南京信息工程大学,南京210044 [3]安徽光学精密机械研究所大气光学重点实验室,合肥230088

出　　处：《气象科技》2022年第2期161-170,共10页Meteorological Science and Technology

基　　金：中国气象局气象探测中心青年基金项目“基于毫米波云雷达云状识别关键技术研究”(TCQN201805);安徽省科技重大专项“基于北斗技术的区域精准气象监测系统研发与应用示范”(812126841050)共同资助。

摘　　要：采用ASC200型地基双波段全天空云量自动观测仪2019年2—5月在中国气象局长沙国家综合气象观测试验基地和上海宝山国家基本气象站的连续观测数据,分别与人工观测云量及器测云量参考标准进行比对,从综合云量、可见光云量及红外云量3方面初步探究其云量观测能力。比对结果显示:该设备长沙站和宝山站综合云量样本与人工云量参考标准差值在±20%以内的样本分别占总量的92.2%和79.4%,长沙站综合云量样本与器测云量参考标准差值在±20%以内的占样本总量的90.5%,差值在±10%以内的占样本总量的86%。结论如下:(1)ASC200综合云量样本与人工及器测云量参考标准一致性良好;(2)验证了可见光云量观测系统在雾霾等天气条件下观测能力较弱,红外云量观测系统对卷云的观测能力较弱;(3)在能见度良好的观测条件下,双波段云量观测系统的云量观测能力优于单一波段云量观测系统。Based on the continuous observation data of the ground-based dual-band all-sky imager(ASC200) from February to May 2019 at the National Integrated Meteorological Observation(Science) Testbed of the China Meteorological Administration in Changsha and the National Basic Weather Station in Baoshan, compared with manual and instrument measurement reference standards, the analysis aims to evaluate the detectability of ASC200 from the three aspects of visible cloud cover, infrared cloud cover and comprehensive cloud cover. The comparison results show that: Samples of comprehensive cloud cover with a difference within ±20% from manual reference standards account for 92.2% at Changsha and 79.4% at Baoshan of the total samples, respectively. Samples of comprehensive cloud cover at Changsha with a difference within ±20% from instrument measurement reference standard cloud cover account for 90.5%, and those with a difference within ±10% account for 86%. The results indicate:(1) Samples of ASC200 comprehensive cloud cover are in good consistency with manual and instrument measurement reference standards;(2) It is verified that the visible cloud observation system is weak in observation under haze or fog weather, and the infrared cloud observation system is weak in cirrus observation;(3) Under the conventional observation conditions with better visibility, the dual-band cloud cover observation system is superior to the single band cloud cover observation system.

关 键 词：地基云观测 全天空观测仪 双波段 云量 

分 类 号：P412[天文地球—大气科学及气象学]