期刊
GEOPHYSICAL RESEARCH LETTERS
卷 43, 期 6, 页码 2974-2980出版社
AMER GEOPHYSICAL UNION
DOI: 10.1002/2016GL068031
关键词
calibration; MFRSR; Sun-sky radiometer; radiation; aerosols; atmosphere
资金
- National Natural Science Foundation of China [41127901, 41401498]
- Natural Science Foundation of Hubei Province [2015CFA002]
- Program for Innovative Research Team in University of Ministry of Education of China [IRT1278]
- Cheng guan project of Wuhan [2014070404010198]
- Specialized Research Fund for the Doctoral Program of Higher Education of China [20120141120010]
Sun photometric measurements, which provide accurate and timely information on atmospheric components such as aerosols, clouds, and gases are important to climate research. For regions with heavy and variable aerosol loading, the traditional Langley plot method cannot be applied for Sun photometric instrument calibration, as almost no suitable prolonged periods with stable atmosphere and low-aerosol loading occurs. An improved calibration method, namely, the transmission and division of total optical depth method, is proposed in this study. Atmospheric total optical depth variation information obtained via other methods is transmitted, and period groups with similar atmospheric extinction effects are selected for Langley regression. This method is validated through calibration of a multifilter rotating shadowband radiometer under heavy aerosol-loading conditions. The obtained aerosol optical depth (AOD) compares well with the interpolated AOD from a Cimel Sun-sky radiometer.
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