HR: 0800h
AN: A51D-0096 [Abstracts]
TI: Evaluation of Lightning NOx Treatment in v2 of the GMI Model and its Effect on Upper Tropospheric NOx
and O3
AU: * Allen, D J
EM: allen@atmos.umd.edu
AF: University of Maryland College Park, 3417 Computer and Space Science Building, College Park, MD 20742
United States
AU: Pickering, K
EM: pickerin@atmos.umd.edu
AF: NASA-GSFC, Code 613.3, Greenbelt, MD 20742
United States
AU: Bhat, M
A51D-0096
AF: Advanced Management Technology Inc. and NASA-GSFC, Code 606.2, Greenbelt, MD 20742
United States
AU: Duncan, B
A51D-0096
AF: University of Maryland Baltimore County-Goddard Earth Science Technology Center, Code 613.3, Greenbelt,
MD 20742
United States
AU: Strahan, S
A51D-0096
AF: University of Maryland Baltimore County-Goddard Earth Science Technology Center, Code 613.3, Greenbelt,
MD 20742
United States
AU: Rodriguez, J
A51D-0096
AF: NASA GSFC and University of Miami, Code 613.3, Greenbelt, MD 20742
United States
AB:
NASA's Global Modeling Initiative (GMI) has been mandated to design, develop, evaluate, and run a community-based CTM that
can be used for assessment purposes. GMI's off-line tropospheric chemistry model currently uses gridded monthly
climatological values of lightning NO emission. In most instances, these model-independent climatological values of
lightning NO injection do not match in space or time with the location of model convection. In this study, we evaluate the
effect of this mismatch on upper tropospheric photochemistry through analysis of fields from one-year GMI simulations driven
by three different sets of meteorological fields (GEOS-STRAT, GISS II' GCM, GMAO) with climatological- and convection-based
lightning NO. We will first examine the output for middle and upper tropospheric NOx and O3 with respect to the spatial and
temporal distributions of the model flash rates. Comparisons will be made between the model output for these species and the
observational composites of Emmons et al. Ozone mixing ratios from the model will be compared with the ozonesonde
climatology of Logan and profiles from the SHADOZ network. The contribution of lightning NO to the upper tropospheric NO and
O3 budget will be assessed for selected simulations.
DE: 0368 Troposphere: constituent transport and chemistry
DE: 3304 Atmospheric electricity
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005