• ISSN 1004-0323     CN 62-1099/TP
• 联合主办：中国科学院遥感联合中心
• 中国科学院兰州文献情报中心
• 中国科学院国家空间科学中心
 遥感技术与应用  2022, Vol. 37 Issue (1): 117-124    DOI: 10.11873/j.issn.1004-0323.2022.1.0117
 青促会十周年专栏

1.中国科学院空天信息创新研究院，遥感科学国家重点实验室，北京 100101
2.中国科学院大学，北京 100049
3.中国人民解放军61741部队，北京 100094
4.中国海洋大学信息科学与工程学部海洋技术学院，山东 青岛 266003
Remote Sensing of Global Air-Sea Latent Heat Fluxes from FY-3 Microwave Radiation Imager Observations
Tingyu An1,2(),Xin Yi3,Xiaofeng Yang1(),Xiaobin Yin4
1.The Key Laboratory of Remote Sensing Science，Aerospace Information Research Institute，Chinese Academy of Sciences，Beijing 100101，China
2.University of Chinese Academy of Sciences，Beijing 100049，China
3.61741 Troops of PLA，Beijing 100094，China
4.Ocean University of China，Faculty of Information Science and Engineering，College of Marine Technology，Qingdao 266003，China
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Abstract:

The Latent Heat Flux（LHF） is an essential indicator for measuring energy and water vapor exchange between the air and sea. Satellite-based surface turbulent fluxes are widely used due to their wide coverage and high timeliness advantages. However， there are still problems with non-synchronous observations and low accuracy of latent heat flux estimation. Since the sea surface air specific humidity is the primary error source in satellite remote sensing of latent heat flux， the air specific humidity retrieval algorithm is improved based on the Fengyun-3 Micro-Wave Radiation Imager（MWRI） data. Compared with the in-situ measurements from moored buoys， the inversion results have been significantly improved. In view of satellite’s relatively fixed overpassing time of satellites， the intraday variation process of latent heat flux is analyzed using the in situ data. Then a daily average latent heat flux estimation model is established. The Fengyun-3/MWRI data are used to calculate the global air-sea latent heat flux by the COARE3.6 algorithm. The bias， Root Mean Square Difference（RMSD）， and correlation coefficient（R2） between satellite and buoy are 3.50 W/m2， 32.96 W/m2， and 0.79.

Key words: Latent Heat Flux    MWRI    FY-3D    Specific Air Humidity

 ZTFLH: P407