Abstract
A parameterization of the mechanism of solar activity impact on the Earth’s troposphere developed by the authors is proposed for a model of outgoing longwave radiation, based on the integral transmission function. The PC-index of geomagnetic activity, which was developed to monitor the polar cap magnetic activity and reflects the affect of the interplanetary electric field on the magnetosphere, was used as the indicator of solar activity. Based on data from NCEP/NCAR reanalysis, we calculated. The integrated transmission function and outgoing longwave flux for periods of increased and decreased solar activity. Correlation analysis of the calculated radiation characteristics with temperature in the 925- to 700-hPa layer showed that the inclusion of solar activity leads to higher correlation between the radiation characteristics and temperature. Comparison of the calculation results with temperature changes confirmed that the proposed parameterization can be used to include impacts of solar activity in numerical models with the integral transmission function to calculate outgoing longwave radiation.
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The authors are grateful to the referee for helpful comments.
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This work is performed with budgetary funding of Basic Research program II.16, with partial support from the RAS Program “Climate Change: Causes, Risks, Consequences, Problems of Adaptation and Regulation.”
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Molodykh, S.I., Zherebtsov, G.A. & Karakhanyan, A.A. Estimation of Solar Activity Impact on the Outgoing Infrared-Radiation Flux. Geomagn. Aeron. 60, 205–211 (2020). https://doi.org/10.1134/S0016793220020103
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DOI: https://doi.org/10.1134/S0016793220020103