HR: 1330h
AN: A32A-0122 [PDF]
TI: Investigations on stomatal uptake of carbonyl sulfide (COS, OCS) and deposition velocities result in
new estimates of global COS deposition to vegetation.
AU: Sandoval-Soto, L
EM: sandova@mpch-mainz.mpg.de
AF: Max Planck Institute for Chemistry, Biogeochemistry Department, Joh.-J.-Becher-Weg 27, Mainz, 55128
Germany
AU: Stanimirov, M
EM: Michael.Stanimirov@fhso.ch
AF: University of Applied Sciences Solothurn, Institute for Automation, Riggenbachstrasse 16, Olten, 4600
Switzerland
AU: Valdez, J
EM: jvaldes@samara.una.ac.cr
AF: University National, Atmospheric Chemistry Laboratory, P.O. Box 86-3000, Heredia, CRI
Costa Rica
AU: von Hobe, M
EM: m.von.hobe@fz-juelich.de
AF: Research Centre Jlich, Institute of Chemistry and Dynamics of the Geosphere (IGG-I),
Leo-Brandt-Strasse, Juelich, 52428
Germany
AU: Schmitt, V
EM: vschmitt@mail.uni-mainz.de
AF: Institute for General Botany, University of Mainz, Muellerweg 6, Mainz, 55128
Germany
AU: Wild, A
EM: wild@mail.uni-mainz.de
AF: Institute for General Botany, University of Mainz, Muellerweg 6, Mainz, 55128
Germany
AU: * Kesselmeier, J
EM: jks@mpch-mainz.mpg.de
AF: Max Planck Institute for Chemistry, Biogeochemistry Department, Joh.-J.-Becher-Weg 27, Mainz, 55128
Germany
AB:
Carbonyl sulfide (COS, OCS) is a highly stable reduced sulfur gas species in the atmosphere. Due to its inertness within the
troposphere it can be transported into the stratosphere where it contributes to form SO2 and sulfate aerosol. Additionally
it may be involved in heterogeneous reactions in stratospheric ozone chemistry. One of the major sinks for this trace gas is
the vegetation. Based on investigations with trees under a light and dark regime and reacting to the hormone abscisic acid
we demonstrated the stomatal uptake of COS to be the dominating pathway for COS deposition to plant surfaces. Taking into
account deposition velocities of COS, which are higher than for CO2, we recalculated the global COS deposition to vegetation
based on a new refined estimation model.
DE: 0315 Biosphere/atmosphere interactions
DE: 0322 Constituent sources and sinks
DE: 0365 Troposphere--composition and chemistry
DE: 1615 Biogeochemical processes (4805)
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting