摘要
大气的温、湿信息是天气预报、天气研究和业务工作的主要参数。作为目前国际上最先进的高光谱红外大气垂直探测器,AIRS(Atmospheric Infrared Sounder)能够检测全球大气的状态和变化。如何从卫星观测到的辐射测值推算出大气参数显得尤为重要。本文首先运用特征向量法反演晴空大气温度廓线,反演的温度廓线与模拟值基本一致,在中上层具有较高的精度,但在对流层低层,尤其是近地面精度不够理想。在此基础上,增加地表温度作为影响因子,反演大气温度廓线,并将加入地表温度项得到的反演结果与未加入此项之前的结果对比,可以看出增加地表温度项对改进反演结果,尤其是低层大气,有明显作用。
Atmospheric temperature and moisture are main parameters of weather forecasts,research and services.As the most advanced infrared atmospheric remote sensing instrument,AIRS(Atmospheric Infrared Sounder) can detect the atmospheric condition and its variability globally.How to calculate the atmosphere parameters from the satellite observed radiance value appears especially important.First this article is to retrieve the clear sky temperature profile,based on the eigenvector regression algorithm.The retrieved profile is consistent with the simulation result basically,with relatively higher precision in the upper troposphere but with low precision in the lower troposphere especially in the surface layer.The temperature result in lower levels is evidently improved when the surface temperature is added.
出处
《大气科学研究与应用》
2009年第1期81-86,共6页
Atmospheric Science Research and Application
