陆面温度的反演算法和大气订正的影响

提出了由卫星辐射测量反演陆面温度的算法,可在不需要预先给定通道的地面比辐射率的情况下,同时确定地面温度和比辐射率。同时,为了了解实际应用这种算法的可能性,在一系列陆面温度反演的模拟试验中,考察分析了在大气温度和湿度廓线有各种不同的误差时大气订正对陆面温度反演精度的影响。结果表明,在大气证正中应用的大气温度和湿度的误差不超过通常由探空和卫星遥感得到的大气温度和湿度的误差时,反演得到的地面温度仍可具有

RETRIEVAL ALGORITHM FOR LAND SURFACE TEMPERATURE AND EFFECT OF ATMOSPHERIC CORRECTION

An algorithm have been presented to retrieve land surface temperature from satellite radiative measurements, without requiring the channel land surface emissivities to be given previously. And by taking different errors in atmospheric temperature and moisture profiles into consideration in retrieval tests of land surface temperature, the atmospheric effect has been investigated, in order to see the possibility for the practical application of the retrieval algorithm. The results show that when the errors in atmospheric temperature and moisture are reasonable as usually could be obtained from radiosonde or satellite retrieval, the land surface temperatures might be determined with acceptable accuracies and the root mean square errors are less than 1K in most cases considered.