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Potential contribution to Self-Introduction Potential contribution to Global Space-based Inter-Calibration System (GSICS) Research Working Group (GRWG) UV Sub-Group Mark.Weber@Uni-Bremen.de www.iup.uni-bremen.de/UVSAT Web meeting, 13 Nov 2013

Name Experience: Other commitments: Mark Weber, Institute of Environmental Physics, University of Bremen Senior Scientist, UVSAT group leader (4 postdocs, 6 graduate students) Experience: GOME, SCIAMACHY, GOME-2, TROPOMI/S5P scientific algorithm development and trace gas validation Solar science: variability and trends in solar spectral irradiance Ozone-climate interaction Laboratory spectroscopy (O3 absorption cross-section) Other commitments: Member of the WMO Ozone Science Advisory Group (since 2005) and International Ozone Commission (IOC) of IAMAS (since 2012) Participation in the upcoming WMO/UNEP Scientific Ozone Assessment

SCIAMACHY optical throughput monitoring Ch. 2: 300-400 nm Radiation damage (deposits of comtaminants on optical surfaces) Improvements in in-flight degradation monitoring In-flight absolute radiometric calibration concepts Ch. 7: 1.94-2.04μm

SSI solar cycle changes Long-term stability of solar spectral irradiance (SSI) measurments Reduce uncertainties in long-term trends large impact on atmospheric heating rates (Calahan et al. 2010, Haigh et al. 2010) and mesospheric ozone (Merkel et al., 2011)  climate impact 2004/01 minus 2007/01 (not a full solar cycle) Pagaran et al., 2011 Ermolli et al., 2013

Impact of level-1 on trace gas retrievals SBUV-type nadir ozone profiles strongly affected by optical degradation common approaches for radiance corrections across sensors Improved long-term ozone profile record from nadir sounders without radiance corrections Bötel et al., manuscript in preparation, 2013