东亚地区高分辨率物理反演方法的数值试验:内部比较研究

NUMERICAL TESTS ON HIGH RESOLUTION PHYSICAL INVERSION METHOD OVER EAST ASIA: INTERCOMPARISON STUDY

为了考察同步物理反演法(Simultaneous physical retrieval method,简称SPRM)的性能,本文着重在反演方法、红外大气透过率算法效应以及SPRM对不同初估值的依赖性三方面,进行了内部比较研究。结果表明:使用透过率调整算法,可以在一定程度上改善物理反演法精度:SPRM的反演精度对初估值的依赖性比统计回归反演法(Statistical regression retrievalmethod,简称SRRM)弱;本阶段SPRM温度反演试验,就大范围纬向平均而论,尚不及改进的SRRM的精度,但在探空资料稀少地区同步物理反演的气象场结构略优于SRRM。

In order to investigate the property of the simultaneous physical inversion method (SPRM), this paper mainly focuses on the tests of the following intercomparison studies: different inversion methods, effects of different atmospheric transmittance algorithm and dependence of the SPRM on diffent initial estimating values. The results show that transmittance adjust algorithm can improve accuracy of the physical inversion method a certain extent. The dependence of the accuracy of the SPRM on initial estimating values is weaker than that of statistical regression inversion method (SPRM). The accuracy of inversion temperatures of the SPRM in large area is little worse than that of improved SPRM, but in lack of radiosonde data area it is better than that of the SPRM.