Modelling the solar UV radiation

Details Modelling the solar UV radiation Modelling the solar UV radiation

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.535..289h&link_type=abstract

In: Solar variability as an input to the Earth's environment. International Solar Cycle Studies (ISCS) Symposium, 23 - 28 June 2

Computer Science

2

Sun: Uv Irradiance, Sun: Variability, Radiative Transfer

Scientific paper

We model the solar spectrum with emphasis on the UV range with the spherical non-LTE atmosphere code COSI (COde for Solar Irradiance). Presently, we explicitly treat 31 levels in non-LTE and apply to 17 levels of neutral metals the latest theoretical photoionization cross sections. The atmosphere models are based on the observed temperature and density structures by Fontenla et al. (1999), which include the chromosphere and transition region. We compare synthetic spectra from 2000 to 7500 Å in local thermodynamic equilibrium (LTE) with calculations from a Kurucz model, as well as theoretical Balmer line profiles computed in non-LTE with observations.

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