摘要
基于2016年8月13日—2017年7月31日激光云高仪(CL51)和搭配红外测温仪的微波辐射计(MWR-IRT)的云底高度(CBH)观测资料,对比分析CL51和MWR-IRT的CBH观测结果的差异,探讨不同天气条件下CL51和MWR-IRT的云高观测性能。结果表明:CL51和MWR-IRT对中低云的识别结果较为一致,对高云识别存在一定差异;云天时,CL51和MWR-IRT观测的CBH较为一致,统计均值分别为1.91 km和2.03 km,二者相关系数为0.65;与MWR-IRT相比,CL51观测的高云较高、低云较低;不同天气条件下CL51和MWR-IRT的观测结果表现不同,雾天和重度霾时其观测结果差异较大,轻雾天时其观测差异有所降低,非雾/霾天、雾霾天、轻度霾天、中度霾天时两者观测结果较为一致。
Based on datasets of cloud base height（CBH） detected by the laser ceilometer（CL51） and the microwave radiometer（MWR-IRT）with the infrared thermometer from 13 August 2016 to 31 July 2017, we have performed the comparative analysis on the differences of CBH from CL51 and MWR-IRT, and discussed the observed performance of CL51 and MWR-IRT to CBH under different weather conditions. The results show that the recognition results of CL51 to low-and middle-cloud are basically consistent with that of MWR-IRT to, but there are certain differences in the their recognition results to high cloud. Under cloudy cases, the CBH detected by CL51 is basically consistent with that detected by MWR-IRT, whose annual mean CBH values are respectively 1.91 km and 2.03 km, and the two recognition results have a high correlation with a correlation coefficient of 0.65. With respect to MWR-IRT, CBH detected by CL51 is higher to high cloud but is lower to low cloud. In addition, under different weather conditions, CL51 and MWR-IRT show different CBH observational performance. There are significant differences in their observational performance to CBH under fog cases and heavy haze cases, slightly differences under light fog cases, but there is basic agreement under no fog or haze cases, fog and haze cases, light haze cases and medium haze cases.
作者
周伶俐
徐桂荣
吴栋桥
王斌
张文刚
ZHOU Lingli;XU Guirong;WU Dongqiao;WANG Bin;ZHANG Wengang(Hubei Key Laboratory for Heavy Rain Monitoring and Warning Research,Institute of Heavy Rain,CMA,Wuhan 430074;Xianning Meteorological Office of Hubei Province,Xianning 437100)
出处
《暴雨灾害》
2018年第5期470-478,共9页
Torrential Rain and Disasters
基金
中国气象局武汉暴雨研究所基本科研业务费专项(JK201708)
国家自然科学基金重点国际(地区)合作研究项目(4161001062)
湖北省气象局科技发展基金年轻科技人员专项(2015Q10)
关键词
激光云高仪
微波辐射计
红外测温仪
云底高度
霾
雾
laser ceilometer
microwave radiometer
infrared thermometer
cloud base height
haze
fog
