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Impact of Climate Change on Air Quality in the U.S.: Investigations With Linked Global- and Regional-Scale Models

The project will use global and regional-scale models for chemistry   and transport to investigate the impact of future climate and   emissions of air quality in the U.S., with focus on ozone and   mercury. The models include linked gas-phase and aqueous   photochemistry and a new approach for representing the interaction   between aerosols and tropospheric chemistry. Meteorology will be   derived from linked global circulation and chemistry/transport   models that include event-specific aerosol impacts on climate.    For ozone, the study will identify future changes based on a range   of model scenarios with changed climate and global emissions. The   study will use model correlations of O3 with temperature as a basis   for evaluating accuracy of the predicted response to climate. Other   species correlations (O3-CO, O3-NOy, O3-PAN) will be investigated as   indicators for the effect of global emissions on air quality.    For mercury, the project will identify the relative impact of local   emissions and global transport in two regions where mercury has   caused environmental damage (the Great Lakes and Florida). EPA field   measurements in those regions will be used to evaluate model   accuracy. A series of species correlations will be investigated as   possible measurement-based evidence for the impact of local versus   global emissions. Correlations between reactive mercury and O3 will   be investigated to determine whether ozone formation also affects   mercury.    The NCAR Finite-VolumeCommunity Climate Model (FVCCM) will be used   to provide climate scenarios for 2 5 . These scenarios will be used   to drive a global-scale model (IMPACT) for chemistry and transport,   including O3, mercury, and nitrate and sulfate aerosols. The global   model will be linked to a modified version of CMAQ that includes   fully integrated gas-aqueous chemistry and mercury chemistry in   addition to ozone and aerosols. CMAQ will be used to simulate air   quality during events in the Midwest and eastern U.S. EPA data for   O3 versus temperature, EPA field measurements for reactive mercury,   and global networks of measured O3, CO and reactive nitrogen will be   used to evaluate results.    (air quality); (mercury); (Hg); (toxic metals); (toxic metal);   (chemicals of concern); (chemical of concern); (ozone); (global   warming); (climate change); (nitrate); (nitrate aerosol); (nitrate   aerosols); (sulfate); (sulfate aerosol); (sulfate aerosols)

In progress
Start Date
End Date
Sanford SillmanPrincipal Investigator
Associated with 1 projects
Jerry KeelerResearcher
Associated with 1 projects
Joyce PennerPrincipal Investigator
Associated with 1 projects
Environmental Protection Agency $ 912,776.00USDActual

Funding 21 projects for a total of $7,345,444.00
Scope of Study
Field Investigation
Laboratory Investigation
Scale of Phenomena
Impact of Pollutants
Toxic Metals
Annex Numbers
Airborne Toxic Substances
Research & Development
Annex 17
Physical and transformational processes affecting delivery of pollutants
  • Annex Numbers
    Annex Numbers
    Airborne Toxic Substances
    Research & Development
  • Annex 17
    Annex 17
    Physical and transformational processes affecting delivery of pollutants

The Great Lakes - St. Lawrence Research Inventory is an
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up-to-date information about research projects in the
Great Lakes - St. Lawrence Region.