Modelling short-term Solar Spectral Irradiance (SSI) using coronal electron density and temperature profiles based on solar magnetic field observations

Some key physical processes that impact the evolution of Earth's atmosphere on time-scale from days to millennia, such as the EUV emissions, are determined by the solar magnetic field. However, observations of the solar spectral irradiance are restricted to the last few solar cycles and are sub...

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Published inProceedings of the International Astronomical Union Vol. 12; no. S327; pp. 82 - 85
Main Authors Gómez, J. M. Rodríguez, Vieira, L. E. Antunes, Lago, A. Dal, Palacios, J., Balmaceda, L. A., Stekel, T.
Format Journal Article
LanguageEnglish
Published Cambridge, UK Cambridge University Press 01.10.2016
Subjects
Astronomy
Atmospheric models
Contributed Papers
Electron density
Emission spectra
Irradiance
Magnetic fields
Magnetic flux
Solar corona
Solar cycle
Solar magnetic field
Temperature profiles
corona
Sun: magnetic fields
photosphere
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Summary:Some key physical processes that impact the evolution of Earth's atmosphere on time-scale from days to millennia, such as the EUV emissions, are determined by the solar magnetic field. However, observations of the solar spectral irradiance are restricted to the last few solar cycles and are subject to large uncertainties. We present a physics-based model to reconstruct short-term solar spectral irradiance (SSI) variability. The coronal magnetic field is estimated to employ the Potential Field Source Surface extrapolation (PFSS) based on observational synoptic charts and magnetic flux transport model. The emission is estimated to employ the CHIANTI atomic database 8.0. The performance of the model is compared to the emission observed by TIMED/SORCE.
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content type line 14
ISSN:1743-9213
1743-9221
DOI:10.1017/S174392131700182X