HR: 17:45h
AN: A14C-07    [Abstracts]
TI: GEM-AQ global simulation of HCN and comparison with ACE satellite observations
AU: * Lupu, A
EM: AlexLupu@yorku.ca
AF: CRESS, York University 4700 Keele Street, Toronto, ON M3J 1P3, Canada
AU: Kaminski, J W
EM: jacek@yorku.ca
AF: CRESS, York University 4700 Keele Street, Toronto, ON M3J 1P3, Canada
AU: Neary, L
EM: lori@nimbus.yorku.ca
AF: CRESS, York University 4700 Keele Street, Toronto, ON M3J 1P3, Canada
AU: Boone, C
EM: cboone@sciborg.uwaterloo.ca
AF: Department of Chemistry, University of Waterloo, Waterloo, ON N2L 3G1, Canada
AU: Jaroz, J
EM: jjarosz@yorku.ca
AF: CRESS, York University 4700 Keele Street, Toronto, ON M3J 1P3, Canada
AU: McConnell, J C
EM: jcmcc@yorku.ca
AF: CRESS, York University 4700 Keele Street, Toronto, ON M3J 1P3, Canada
AU: Rinsland, C
EM: c.p.rinsland@larc.nasa.gov
AF: NASA Langley Research Center, Mail Stop 401A, Hampton, VA 23681-3142, United States
AU: Bernath, P
EM: pfb500@york.ac.uk
AF: Dep of Chemistry, University of York Heslington, York, YO10 5DD, United Kingdom
AU: Walker, K A
EM: kwalker@atmosp.physics.utoronto.ca
AF: Department of Physics, University of Toronto, Toronto, ON M5S 1A7, Canada
AB: Biomass burning is a significant source of trace gases and particulate matter in the troposphere and has an important impact on the global climate system. It is therefore important to understand and quantify its effect on the chemistry of the atmosphere. Critical issues relate to estimating emissions and their spatial and temporal distribution. In this study we investigate these issues through numerical simulations and comparison with observations from the ACE-FTS an instrument on SCISAT-I, a Canadian small satellite. Since hydrogen cyanide (HCN) is considered to be a sensitive tracer of biomass burning, we focus on this species. To perform the simulations, we used the Global Environmental Multiscale Air Quality model (GEM-AQ). GEM-AQ is based on the 3-D global variable-resolution multiscale operational weather forecast model (GEM) developed by the Meteorological Service of Canada and incorporates on-line air quality modules including gas phase chemistry and size-resolved multi-component aerosols. For these simulations GEM-AQ was run for the period 2004--2006 on a 4° × 4° global grid with 28 hybrid vertical levels from the surface up to 10 hPa. Objective analysis data were used to update the meteorological fields every 24 hours. Fire emission fluxes of gas species were generated by using year-specific inventories of carbon emissions with 8-day temporal resolution from the Global Fire Emission Database version 2. The results from model simulations are compared with troposphere/lower stratosphere HCN profiles measured by the ACE-FTS. Several experiments have been made varying injection heights which indicate that generally better agreement with measurements is obtained when the injection is not solely into the PBL.
DE: 0368 Troposphere: constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2007 Fall Meeting