HR: 1340h
AN: A43C-0106    [Abstracts]
TI: New Satellite Data Sets to Evaluate the Impact of Galactic Cosmic Rays on Clouds
AU: Rohs, S
EM: s.rohs@fz-juelich.de
AF: Research Center Jülich, Institute for Chemistry and Dynamics of the Geosphere, ICG I, Staatsforst Stetternich, Juelich, 52425 Germany
AU: Spang, R
EM: r.spang@fz-juelich.de
AF: Research Center Jülich, Institute for Chemistry and Dynamics of the Geosphere, ICG I, Staatsforst Stetternich, Juelich, 52425 Germany
AU: * Grooss, J
EM: j.-u.@grooss
AF: Research Center Jülich, Institute for Chemistry and Dynamics of the Geosphere, ICG I, Staatsforst Stetternich, Juelich, 52425 Germany
AU: Riese, M
EM: m.riese@fz-juelich.de
AF: Research Center Jülich, Institute for Chemistry and Dynamics of the Geosphere, ICG I, Staatsforst Stetternich, Juelich, 52425 Germany
AU: Wang, P
EM: p.wang@larc.nasa.gov
AF: STC/NASA-LaRC, MS-910, Hampton, VA 23681-2199
AB: Since years the scientific community discusses controversially the solar activity modulated coupling between galactic cosmic rays (GCRs) and cloudiness, which by itself affects the natural climate variability. To further evaluate this GCR-cloud link we have started the project 'SAtellite and model studies of GAlactic cosmic rays and Clouds modulated by solar activity' (SAGACITY) as part of the German DFG priority program CAWSES. SAGACITY focus on satellite limb-observations of cirrus clouds. The long-term 20 year data record of subvisible cirrus occurrence observed by the SAGE II is analysed as well as episodes of solar proton events and the subsequent Forbush decreases using recent data of the Michelson Interferometer for Passive Atmospheric Sounding (MIPAS) instrument onboard ENVISAT. In addition, we plan to develop appropriate nucleation parameterisations and their implementation in the chemical transport model CLaMS for theoretical model studies of the GCR-cloud link. Our proposed activities during SAGACITY and first results will be presented.
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0320 Cloud physics and chemistry
DE: 2479 Solar radiation and cosmic ray effects
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005