naa a22 4500 528786806 20180924065502.0 cr unu---uuuuu 180924s2008 xx s 000 0 eng 10.3929/ethz-b-000012569 doi 10.5194/acp-8-2965-2008 doi (ETHRESEARCH)oai:www.research-collection.ethz.ch:20.500.11850/12569 Reconstruction of the solar spectral UV irradiance for nowcasting of the middle atmosphere state on the basis of LYRA measurements [Elektronische Daten] [Tatiana Egorova, Eugene Rozanov, Jean-Francois Hochedez, Werner Schmutz] Atmos. chem. phys. Open access ethresearch The LYRA instrument onboard ESA PROBA2 satellite will provide 6-hourly solar irradiance at the Lyman-alpha (121.6 nm) and the Herzberg continuum (~200-220 nm wavelength range). Because the nowcasting of the neutral and ionic state of the middle atmosphere requires the solar irradiance for the wide spectral range (120-680 nm) we have developed the statistical tool for the reconstruction of the full spectrum from the LYRA measurements. The accuracy of the reconstructed irradiance has been evaluated with 1-D transient radiative-convective model with neutral and ion chemistry using the daily solar spectral irradiance measured with SUSIM and SOLSTICE instruments onboard UARS satellite. We compared the results of transient 1-year long model simulations for 2000 driven by the observed and reconstructed solar irradiance and showed that the reconstruction of the full spectrum using linear regression equation based on the solar irradiance in two LYRA channels can be successfully used for nowcasting of the middle atmosphere. We have also identified conditions when the proposed approach does not yield spectral reconstruction with sufficient accuracy. Creative Commons Attribution 3.0 Unported http://creativecommons.org/licenses/by/3.0 ethresearch Egorova Tatiana joint author Rozanov Eugene joint author Hochedez Jean-Francois joint author Schmutz Werner joint author Atmospheric Chemistry and Physics Munich : European Geophysical Society 8 (11), pp. 2965-2973 1680-7375 http://hdl.handle.net/20.500.11850/12569 text/html WWW-Backlink auf das Repository (Open access) 1 Journal Article ethresearch ETHRESEARCH 856 40 http://hdl.handle.net/20.500.11850/12569 text/html WWW-Backlink auf das Repository (Open access) ETHRESEARCH 700 1- Egorova Tatiana joint author ETHRESEARCH 700 1- Rozanov Eugene joint author ETHRESEARCH 700 1- Hochedez Jean-Francois joint author ETHRESEARCH 700 1- Schmutz Werner joint author ETHRESEARCH 773 0- Atmospheric Chemistry and Physics Munich : European Geophysical Society 8 (11), pp. 2965-2973 1680-7375 BK010053 XK010053 XK010000 ETHRESEARCH ETHRESEARCH ETHRESEARCH Journal Article Open access