| 光谱学与光谱分析 |
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| Simulation of Atmospheric Temperature and Moisture Profiles Retrieval from CrIS Observations |
| MA Peng-fei1,2, CHEN Liang-fu1*, TAO Jin-hua1, SU Lin1, TAO Ming-hui1, WANG Zi-feng1, ZOU Ming-min1, ZHANG Ying1 |
1. The State Key Laboratory of Remote Sensing Science，Institute of Remote Sensing and Digital Earth (RADI), Chinese Academy of Sciences, Beijing 100101, China
2. University of Chinese Academy of Sciences, Beijing 100049, China |
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Abstract In order to get higher vertical resolution atmosphere profile information, the present paper retrieves atmospheric temperature and moisture profiles from the Cross-track Infrared Sounder (CrIS) on the newly-launched Suomi National Polar-orbiting Partnership (Suomi NPP) and future Joint Polar Satellite System (JPSS) with a nonlinear Newton iteration method by using the profiles retrieved via statical regression method as the first guess, and the issue of channel selection is discussed. The retrieved profiles are compared with radiosonde observations, and National Centers for Environmental Prediction (NCEP) Global Data Assimilation System (GDAS) analyses show that the physical retrievals of temperature and moisture are in good agreement with the distributions from GDAS analysis fields and radiosonde observations, and have a notable improvements of the atmospheric profile retrieval accuracy as compared with the eigenvector regression algorithm. For pressures between 200 and 700 hPa the accuracy is of the order of 1 K for the temperature profile, and 20% for the relative humidity profile is consistent with the jacobian peaks of the selected channels.
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Received: 2013-08-13
Accepted: 2014-01-10
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Corresponding Authors:
CHEN Liang-fu
E-mail: lfchen@irsa.ac.cn
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