HR: 1330h
AN: A22C-1086    [PDF]
TI: The impact of the 1998 boreal forest fires on oxidant chemistry in the global troposphere
AU: * Leung, F T
EM: fyl@io.harvard.edu
AF: Harvard University, 29 Oxford St, Cambridge, MA 02138 United States
AU: Logan, J A
EM: jal@io.harvard.edu
AF: Harvard University, 29 Oxford St, Cambridge, MA 02138 United States
AU: Streets, D G
EM: dstreets@anl.gov
AF: Argonne National Laboratory, Decision and Information Sciences division, Argonne, IL 60439 United States
AU: Kasischke, E S
EM: ekasisch@geog.umd.edu
AF: University of Maryland, Department of Geography, College Park, MD 20742 United States
AU: Hyer, E
EM: ehyer@geog.umd.edu
AF: University of Maryland, Department of Geography, College Park, MD 20742 United States
AB: The highest surface measurements of northern mid and high latitude CO in the past 15 years were recorded in the summer and fall of 1998. These high values have been linked with anomalously large boreal forest fires associated with El Nino conditions. To study the impact of these forest fires on oxidant chemistry in the global troposphere, we use the GEOS-CHEM global 3-D model driven by biomass burning emissions of trace gases derived from AVHRR firecount data. We compare model results for CO using two independently derived fire products with column data and with concentration measurements at CMDL monitoring sites. To probe the effects of the increased fire activity on OH and ozone, we study the differences between model runs using emissions specific to 1998 and using annual mean biomass burning emissions.
DE: 0365 Troposphere--composition and chemistry
DE: 0368 Troposphere--constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2003 Fall Meeting