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Abstract

A calibration method and a system for long-wave radiometers are provided, which relate to the field of calibration technologies for long-wave radiometers, and the method includes: obtaining, by using long-wave radiation values at a top of atmosphere (TOA) as a standard, data of meteorological parameters and carbon dioxide (CO₂) flux measured at a target station; determining a target energy action state for expressing physical, chemical and biological processes involved in radiation transmission and interaction between the data and radiation based on change rules of radiation, the meteorological parameters and the CO₂ flux and interrelation of them; obtaining a calibration coefficient based on the target energy action state and values and value ranges of temperature and humidity, ground water vapor pressure and the CO₂ flux to calibrate the long-wave radiometer; the calibration work can be performed at the station during routine measurement, and a continuity of the measurement can be ensured.

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