HR: 08:45h
AN: A31C-04 [Abstracts]
TI: Improving emissions inventories in Mexico through systematic analysis of model performance along C-130 and DC-8 flight tracks during MILAGRO
AU: * Mena-Carrasco, M
EM: marcelo-mena@uiowa.edu
AF: Center for Global and Regional Environmental Research, 401 IATL, Iowa City, IA 52242,
United States
AU: Carmichael, G R
EM: gcarmich@engineering.uiowa.edu
AF: Center for Global and Regional Environmental Research, 401 IATL, Iowa City, IA 52242,
United States
AU: Campbell, J E
EM: cae@engineering.uiowa.edu
AF: Center for Global and Regional Environmental Research, 401 IATL, Iowa City, IA 52242,
United States
AU: Tang, Y
EM: ytang@cgrer.uiowa.edu
AF: Center for Global and Regional Environmental Research, 401 IATL, Iowa City, IA 52242,
United States
AU: Chai, T
EM: tchai@cgrer.uiowa.edu
AF: Center for Global and Regional Environmental Research, 401 IATL, Iowa City, IA 52242,
United States
AB:
During the MILAGRO campaign in March 2006 the University of Iowa provided regional air quality forecasting for
scientific flight planning for the C-130 and DC-8. Model performance showed positive bias of ozone prediction
(~15ppbv), associated to overpredictions in precursor concentrations (~2.15 ppbv NOy and ~1ppmv ARO1). Model
bias showed a distinct geographical pattern in which the higher values were in and near Mexico City. Newer runs
in which NOx and VOC emissions were decreased improved ozone prediction, decreasing bias and increasing
model correlation, at the same time reducing regional bias over Mexico. This work will evaluate model
performance using the newly published Mexico National Emissions Inventory, and the introduction of data
assimilation to recover emissions scaling factors to optimize model performance. Finally the results of sensitivity
runs showing the regional impact of Mexico City emissions on ozone concentrations will be shown, along with the
influence of Mexico City aerosol concentrations on regional photochemistry.
DE: 0345 Pollution: urban and regional (0305, 0478, 4251)
DE: 0545 Modeling (4255)
DE: 3315 Data assimilation
SC: Atmospheric Sciences [A]
MN: 2007 Joint Assembly