HR: 1340h
AN: A43C-0066    [Abstracts]
TI: Investigation of the importance of injection heights of biomass burning emissions from boreal fires to tropospheric modeling.
AU: * Leung, F T
EM: fyl@io.harvard.edu
AF: Harvard University, Atmospheric Sciences Pierce Hall Harvard University, Cambridge, MA 02138 United States
AU: Heald, C L
EM: clh@io.harvard.edu
AF: Harvard University, Atmospheric Sciences Pierce Hall Harvard University, Cambridge, MA 02138 United States
AU: Yevich, R
EM: rmy@io.harvard.edu
AF: Harvard University, Atmospheric Sciences Pierce Hall Harvard University, Cambridge, MA 02138 United States
AU: Logan, J
EM: jal@io.harvard.edu
AF: Harvard University, Atmospheric Sciences Pierce Hall Harvard University, Cambridge, MA 02138 United States
AB: Injection heights of biomass burning emissions from the boreal forests of Russia, Alaska, and Canada represent a major uncertainty in modeling their effects on atmospheric composition. There is substantial evidence that emissions from boreal forests are injected in the free troposphere, and even into the lower stratosphere on occasion. However, there is currently no method for parameterizing these injection heights in global models. Simulations with the GEOS-CHEM model show that a substantial fraction of the emissions from boreal fires must be injected above the boundary layer. In this study, we investigate the effects of intense boreal fires in 2002 using the GEOS-CHEM model, using various assumptions for the injection heights. Results are evaluated with CO columns retrieved from the MOPITT satellite instrument, as well as surface data.
DE: 0300 ATMOSPHERIC COMPOSITION AND STRUCTURE
DE: 0322 Constituent sources and sinks
DE: 0368 Troposphere--constituent transport and chemistry
SC: Atmospheric Sciences [A]
MN: 2004 AGU Fall Meeting