HR: 0800h
AN: B41B-0458    [Abstracts]
TI: The Impact of Land Cover and Land Use Changes on Atmosphere-Biosphere Exchanges and Atmospheric Chemistry
AU: * Ganzeveld, L
EM: laurens.ganzeveld@wur.nl
AF: Wageningen University and Research Centre, Department of Environmental Sciences, Chair Group Earth System Sciences, Droevendaalsesteeg 4, Wageningen, 6707PB, Netherlands
AU: * Ganzeveld, L
EM: laurens.ganzeveld@wur.nl
AF: Max Planck Institute for Chemistry, Joh.-Joachim Becherweg 27, Mainz, D55128, Germany
AU: Bouwman, L
EM: lex.bouwman@mnp.nl
AF: National Institute for Public Health and the Environment, Netherlands Environmental Assessment Agency, Antonie van Leeuwenhoeklaan 9, Bilthoven, 3721MA, Netherlands
AU: Eickhout, B
EM: bas.eickhout@mnp.nl
AF: National Institute for Public Health and the Environment, Netherlands Environmental Assessment Agency, Antonie van Leeuwenhoeklaan 9, Bilthoven, 3721MA, Netherlands
AU: Stehfest, E
EM: elke.stehfest@mnp.nl
AF: National Institute for Public Health and the Environment, Netherlands Environmental Assessment Agency, Antonie van Leeuwenhoeklaan 9, Bilthoven, 3721MA, Netherlands
AU: van Vuuren, D
EM: detlef.van.vuuren@mnp.nl
AF: National Institute for Public Health and the Environment, Netherlands Environmental Assessment Agency, Antonie van Leeuwenhoeklaan 9, Bilthoven, 3721MA, Netherlands
AU: Tanarthe, M
EM: meryemta@mpch-mainz.mpg.de
AF: Max Planck Institute for Chemistry, Joh.-Joachim Becherweg 27, Mainz, D55128, Germany
AU: Tost, H
EM: tost@mpch-mainz. mpg.de
AF: Max Planck Institute for Chemistry, Joh.-Joachim Becherweg 27, Mainz, D55128, Germany
AU: Lelieveld, J
EM: lelieveld@mpch-mainz.mpg.de
AF: Max Planck Institute for Chemistry, Joh.-Joachim Becherweg 27, Mainz, D55128, Germany
AB: One of the challenging foci of global atmospheric chemistry research is how the atmospheric oxidizing (or cleansing) capacity, which also controls the lifetime of greenhouse gases such as methane, will change in response to climate- and land cover and land use changes. This is also motivated by anticipated global land cover and land use scenarios, which indicate that the terrestrial biosphere is expected to be affected significantly by anthropogenic activities, e.g., tropical deforestation. Analysis with a single-column chemistry-climate model has indicated that short-term (days) changes in the atmospheric oxidizing capacity due to Amazonian deforestation not only depend on changes in surface trace gas exchanges. There are also significant changes in vertical convective and turbulent transport and the hydrological cycle due to changes in surface energy and water exchanges. We apply the global chemistry-climate model ECHAM5/MESSy to present an analysis of the long-term impact of land-cover and land-use changes on surface exchanges and global atmospheric chemistry. The land cover and land use change scenarios are taken from the Integrated Model to Assess the Global Environment (IMAGE). In addition to changes in surface trace gas exchanges associated with land use changes, we include changes in micro- and boundary layer meteorology and hydrology and elaborate on the relative importance of land use changes compared to anticipated increases in anthropogenic emissions for atmospheric chemistry.
DE: 0315 Biosphere/atmosphere interactions (0426, 1610)
DE: 0322 Constituent sources and sinks
DE: 0368 Troposphere: constituent transport and chemistry
DE: 0402 Agricultural systems
DE: 0426 Biosphere/atmosphere interactions (0315)
SC: Biogeosciences [B]
MN: 2007 Fall Meeting