HR: 17:35h
AN: A44A-05    [Abstracts]
TI: Nonlinear Source -" Receptor Relationship due to Interactions between Atmospheric Constituents, Water Cycle and Biogenic Emissions
AU: Kinne, S
EM: stefan.kinne@zmaw.de
AF: Max Planck Institute for Meteorology, Bundesstr. 53, Hamburg, 20146, Germany
AU: * Feichter, J
EM: johann.feichter@zmaw.de
AF: Max Planck Institute for Meteorology, Bundesstr. 53, Hamburg, 20146, Germany
AU: Rast, S
EM: sebastian.rast@zmaw.de
AF: Max Planck Institute for Meteorology, Bundesstr. 53, Hamburg, 20146, Germany
AU: Bey, I
EM: isabelle.bey@epfl.ch
AF: Ecole Polytechnique Federale de Lausanne, LMCA-EPFL, Station 2, Lausanne, 1015, Switzerland
AU: Folberth, G
EM: gerd.folberth@epfl.ch
AF: Ecole Polytechnique Federale de Lausanne, LMCA-EPFL, Station 2, Lausanne, 1015, Switzerland
AU: Pozzoli, L
EM: luca.pozzoli@epfl.ch
AF: Ecole Polytechnique Federale de Lausanne, LMCA-EPFL, Station 2, Lausanne, 1015, Switzerland
AU: Kloster, S
EM: silvia.kloster@jrc.it
AF: Joint Research Center, Climate Research Unit, via Enrico Fermi, Ispra, VA 21020, Italy
AU: Stier, P
EM: philip.stier@caltech.edu
AF: California Institute of Technology, 1200 E. California Blvd., Pasadena, CA 91125, United States
AB: Specific economic sectors or source regions emit a wide variety of air pollutants which influence climate and air quality. This includes emissions of greenhouse gases, chemical species which affect the oxidation capacity of the atmosphere and the concentrations of ozone and methane, and aerosol particles or aerosol precursors. Regional climate respectively weather controls transport and removal of pollutants, chemical transformation pathways, particle formation rate and sink processes as well as emissions from natural sources. Interactions between aerosols and trace gases modify their global and regional distributions. Thus, climatic and environmental impacts are not only controlled by amount and chemical composition of pollutant emissions but in addition also by their interactions and the local meteorological conditions in the source region. For the development of mitigation strategies to minimize adverse conditions attributed to climate change and air pollution we need a better understanding of the role of source location, impact of interactions and feedbacks and of the influence of climate change on the chemical composition of the atmosphere. To demonstrate interactions and feedbacks between the cycles of gaseous and particulate atmospheric constituents, the water cycle, the biosphere and the changing climate we will present results of a series of numerical model simulations. Investigations include interactions between greenhouse gas warming, water cycle and aerosol cycle (Feichter et al., 2004), between aerosol cycles (Stier et al., 2006), between marine biogeochemistry and aerosol cycles (Kloster et al., 2006), and between gas-phase air chemistry and aerosol constituents (Pozzoli et al., 2007). The presentation discusses possible interactions and feedbacks and emphasizes the need for a better integration of the different Earth system components in climate and air quality models. Finally, the question whether anthropogenic emissions from different regions result in different climate sensitivity will be raised. Feichter J, Roeckner E, Lohmann U., Liepert B (2004): Nonlinear aspects of the climate response to greenhouse gas and aerosol forcing, Journal of Climate; 17, No 12, 2384-2398. Kloster, S. , Feichter, J., Maier-Reimer, E., Roeckner, Wetzel, P., Six, K.D., Stier, P. and Esch, M., (2007): Response of dimethylsulfide (DMS) in the ocean and atmosphere to global warming, J. Geophys. Res. (subm). Stier, P., J. Feichter, S. Kloster, E. Vignati, and J. Wilson (2006): Emission-Induced Nonlinearities in the Global Aerosol System - Results from the ECHAM5-HAM Aerosol-Climate Model, J. Clim Pozzoli L, I Bey, S Rast, M Schultz, P Stier and Feichter, (2007): Trace gas and aerosol interactions in a global coupled model of chemistry-aerosol-climate (to be subm.).
DE: 0305 Aerosols and particles (0345, 4801, 4906)
DE: 0315 Biosphere/atmosphere interactions (0426, 1610)
DE: 0365 Troposphere: composition and chemistry
DE: 1626 Global climate models (3337, 4928)
SC: Atmospheric Sciences [A]
MN: 2007 Joint Assembly