Radiation transfer calculation method for processing solar radiation energy with long wave interval

Abstract

The invention discloses a radiation transmission calculation method for processing solar radiation energy in the long-wave range. First, the short-wave and infrared radiation transmission equations are respectively solved to obtain the reflection and transmission functions of each layer of the atmosphere; The combined reflection and transmission functions of the multi-layer atmosphere are obtained from the reflection and transmission functions of the multi-layer atmosphere; finally, the radiation flux of the multi-layer atmosphere in the long-wave range is obtained from the joint reflection and transmission functions, and then the heating rate is obtained from the flux. The present invention adopts the accumulation method and superposition principle to deduce theoretically the long-wave radiation transmission scheme including solar radiation energy in the long-wave interval, and writes the FORTRAN program according to the theory, and designs a new radiation parameterization scheme to replace the original radiation parameterization in the model In this way, the radiation calculation error in the model can be reduced, the calculation accuracy can be improved, and the uncertainty of the radiation flux calculation can be reduced.

Description

technical field [0001] The invention designs a radiation transmission calculation method for processing solar radiation energy in the long-wave interval, in particular, a long-wave radiation calculation method suitable for numerical models including solar radiation energy in the long-wave interval. Background technique [0002] More than 90% of the solar energy is concentrated in the short-wave range with a shorter wavelength, and its peak value is around 0.5 μm (Liou2002), so solar radiation is also called short-wave radiation. The thermal infrared radiation emitted by the earth surface and the atmosphere has its maximum energy concentrated around a wavelength of 10 μm (Liou 2002), so infrared radiation is also called long-wave radiation. Usually in the numerical model, the solar spectrum and the infrared spectrum are divided into two spectral regions with the wavelength shorter or longer than 4 μm, but there is overlap between them. About 1% of solar radiation energy is l...

AI Technical Summary

Problems solved by technology

[0004] In the past, in the model, there are two processing methods for the solar radiation energy in the long-wave range: one is to directly ignore this part of the solar radiation; the other is to use the solar radiation energy in the long-wave range according to the distribution of solar radiation energy in the short-wave range. , but this method will reduce the gas absorption of this part of the energy, thus increasing the calculation error

Therefore, no matter which processing method is used, it will affect the radiation balance in the numerical model

Li (2010) proposed a simple method to deal with the solar energy in the long-wave range, but this method ignores the scattering effect in the long-wave range

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