遥感大气结构的地基12通道微波辐射计测量结果分析  

Characteristics of the Atmosphere Remote Sensed by the Ground-Based 12-Channel Radiometer

作　　者：刘红燕[1] 李炬[1] 曹晓彦[1] 熊斌[1] 

机构地区：[1]中国气象局北京城市气象研究所,北京100089

出　　处：《遥感技术与应用》2007年第2期222-229,共8页Remote Sensing Technology and Application

基　　金：北京市科委环境大气综合探测资料四维数据库技术研究(H020620250230)

摘　　要：用地基12通道微波辐射计在北京地区做了为期1年(2005年8月-2006年8月)的测量,测量得到的水汽总量与探空资料得到的水汽总量的相关系数在0.97以上。由神经网络反演得到的温度、湿度和水汽廓线与探空得到的结果,按照春、夏、秋、冬4个季节做了对比分析。同时分析了在2006年4月17日北京发生沙尘暴期间,微波辐射计观测的总水汽量的变化特征以及反演得到的各种廓线结构特征。发现在沙尘暴发生期间,北京的水汽总量出现明显增长,其最大值达到2.25cm,而2006年4月份的平均总水汽量为1.057 cm。且发生沙尘暴期间北京地面到1 km高度范围内温度升高,即发生沙尘暴时,边界层的热力结构也发生了变化。这些特征变化,地基12通道微波辐射计都可以观测得到。The ground-based 12-channel radiometer has been observing for about one year(from August,2005 to August,2006).The coefficient of the integrated water vapor between the radiometer and the radiosonde is above 0.97.The Temperature profile,the relative humidity profile and the water vapor profile can be obtained by the neural network algorithm.The three kinds of profiles are compared between the radiometer and the radiosonde.Although there are some difference between the radiometer and the radiosonde for the three kinds of profile,the profiles of the radiometer are valuable for its time continuity,un-attendant and less cost,and so on.There is a strong sand storm on April 17,2006 in Beijing.The maximum integrated water vapor on that day is 2.25 cm,much larger than other day's in April.The mean integrated water vapor is 1.057 cm in April.On the other hand,during that time,the temperature of the boundary layer,from the surface to the 1 km,went up.It means that the thermodynamic structure of the boundary layer will have some change,during the sand storm.All these atmospheric characteristics can be observed by the ground-based 12-channel radiometer.

关 键 词：地基12通道微波辐射计 探空 水汽总量 廓线 

分 类 号：TP732.1[自动化与计算机技术—检测技术与自动化装置]