|
| Contribution of air pollution precursors to regional
ozone and PM2.5 formation and effectiveness of currently planned control strategies are investigated considering
potential future climate changes over the North America. The changes in semi-normalized first-order sensitivities
of ozone and PM2.5 formation to their precursors(e.g., NOx, SO2, NH3 and VOCs) due to potential future climate change alone as well as the combined effects
of climate change and projected emission controls are quantified using MM5, SMOKE and CMAQ with DDM-3D. Sensitivities
of ozone and PM2.5 formation to precursor emissions are found to change relatively little when considering only
the potential changes in future climate. In many cases, absolute sensitivities (e.g., ppm/ton) to NOx and SO2 controls are predicted to be greater in the future due to both the lower emissions as
well as likely changes in climate, suggesting that control strategies designed for reducing NOx and SO2 emissions based on current climatic conditions will continue to be effective for decreasing
ground-level ozone and PM2.5 concentrations under the impacts of potential future climate changes, possibility
even more so than they are today. Contributions of biogenic VOC emissions to PM2.5 formation are simulated to be
more important in the future because of higher temperatures and higher biogenic emissions, while future emission
reductions decrease the sensitivities of PM2.5 to SO2 and NOx emissions. |
| |
|
|
Praveen K. Amar, Ph.D., P.E., is the Director of Science and Policy at NESCAUM (Northeast
States for Coordinated Air Use Management). NESCAUM, located in Boston, Massachusetts, is an interagency association
of eight northeastern states (New York, New Jersey, Connecticut, Maine, Massachusetts, Vermont, Rhode Island, and
New Hampshire). NESCAUM provides high-level scientific and policy-relevant input to its member states on regional
air pollution issues.
Dr. Amar's key area of expertise is to "translate" the implications of findings of science and developments
in technology into workable and cost-effective policy options for the states in the Northeast. These policy options
have involved cost-effective technologies to reduce emissions of mercury from large utility boilers and municipal
waste combustors, regional control of emissions of oxides of nitrogen and sulfur, including market-based approaches,
relative roles of local and regional sources, planning for achieving ambient standards for fine particles and ozone,
and promotion of environmentally friendly distributed generation technologies. Since 2003, he has been acting as
a Co-Principal Investigator at NESCAUM in a joint effort with Georgia Institute of Technology and MIT on a policy-relevant
research project that is evaluating future impacts of global climate change on regional air quality in the US (ozone
and fine PM).
While at NESCAUM, he has served as member of the Science Advisory Committee (1993-2001) for the EPA-funded, MIT-Caltech-New
Jersey Institute of Technology Center on Airborne Organics. He served as a member of the Synthesis Team (1996-2000)
for the NARSTO that produced the July 2000 report "An Assessment of Tropospheric Ozone Pollution," and
in February 2003, published " Particulate Matter Science for Policy Makers: A NARSTO Assessment." In
2002, he testified before the US House Science Committee on control strategies for particulate air pollution. In
April 2005 he testified before the Democratic Policy Committee of the US Senate on EPA's proposed rule to control
mercury emissions from coal-fired utility boilers.
Before joining NESCAUM, Dr. Amar was with the California Air Resources Board for fifteen years (1977-1992) where
he managed programs on air pollution research (including research on acid deposition, atmospheric processes and
ecological effects), strategic planning, and industrial source pollution control. For over 10 years, he has been
a part-time faculty member at the University of California, Davis, California State University at Sacramento, and
Tufts University in Boston, teaching undergraduate and graduate courses in air pollution science and policy, atmospheric
chemistry and physics, and fluid mechanics and heat transfer processes. He received his Ph.D. in engineering from
UCLA in 1977. Dr. Amar is a licensed Mechanical Engineer in the State of California. |
| |
|
|
|
For more information on this
Seminar please contact Peter Mathews at (916) 323-8711 or send email to: pmathews@arb.ca.gov
|
| |
|
|
|
For a complete listing of
the ARB Chairman's Series and the related documentation for each one of the series please check this page
|
|
