HR: 16:40h
AN: A44A-02 INVITED     [Abstracts]
TI: Ozone Air Quality and Radiative Forcing Consequences of Changes in Ozone Precursor Emissions
AU: * West, J
EM: jwest@princeton.edu
AF: Atmospheric & Oceanic Sciences Program, Princeton University, Sayre Hall, Princeton, NJ 08544, United States
AU: * West, J
EM: jwest@princeton.edu
AF: Woodrow Wilson School of Public & International Affairs, Princeton University, Robertson Hall, Princeton, NJ 08544, United States
AU: * West, J
EM: jwest@princeton.edu
AF: Department of Environmental Sciences and Engineering, University of North Carolina, Chapel Hill, CB #7431, Rosenau Hall, Chapel Hill, NC 27599, United States
AU: Fiore, A M
EM: arlene.fiore@noaa.gov
AF: NOAA Geophysical Fluid Dynamics Laboratory, 201 Forrestal Road, Princeton, NJ 08540, United States
AU: Naik, V
EM: vnaik@princeton.edu
AF: Woodrow Wilson School of Public & International Affairs, Princeton University, Robertson Hall, Princeton, NJ 08544, United States
AU: Horowitz, L W
EM: larry.horowitz@noaa.gov
AF: NOAA Geophysical Fluid Dynamics Laboratory, 201 Forrestal Road, Princeton, NJ 08540, United States
AU: Schwarzkopf, M
EM: dan.schwarzkopf@noaa.gov
AF: NOAA Geophysical Fluid Dynamics Laboratory, 201 Forrestal Road, Princeton, NJ 08540, United States
AU: Mauzerall, D L
EM: mauzeral@princeton.edu
AF: Woodrow Wilson School of Public & International Affairs, Princeton University, Robertson Hall, Princeton, NJ 08544, United States
AU: Mauzerall, D L
EM: mauzeral@princeton.edu
AF: Department of Geosciences, Guyot Hall, Princeton, NJ 08544, United States
AB: Changes in emissions of ozone (O₃) precursors affect both air quality and climate. We first examine the sensitivity of surface O₃ concentrations (O₃^srf) and net radiative forcing of climate (RF_net) to reductions in emissions of four precursors - nitrogen oxides (NO_x), non-methane volatile organic compounds, carbon monoxide, and methane (CH₄). We show that long-term CH₄-induced changes in O₃, known to be important for climate, are also relevant for air quality; for example, NO_x reductions increase CH₄, causing a long-term O₃ increase that partially counteracts the direct O₃ decrease. Second, we assess the radiative forcing resulting from actions to improve O₃ air quality by calculating the ratio of ΔRF_net to changes in metrics of O₃^srf. Decreases in CH₄ emissions cause the greatest RF_net decrease per unit reduction in O₃^srf, while NO_x reductions increase RF_net. Of the available means to improve O₃ air quality, therefore, CH₄ abatement best reduces climate forcing.
DE: 0365 Troposphere: composition and chemistry
DE: 0368 Troposphere: constituent transport and chemistry
DE: 1610 Atmosphere (0315, 0325)
DE: 3305 Climate change and variability (1616, 1635, 3309, 4215, 4513)
SC: Atmospheric Sciences [A]
MN: 2007 Joint Assembly