HR: 10:50h
AN: A32A-02    [Abstracts]
TI: The Effects of Climate Change on Biogenic VOCs and Regional Air Quality in California
AU: * Steiner, A L
EM: asteiner@nature.berkeley.edu
AF: University of California, Berkeley, Department of Environmental Science, Policy and Management, Berkeley, CA 94107-3110 United States
AU: Tonse, S
EM: tonse@lbl.gov
AF: Lawrence Berkeley National Laboratory, Atmospheric Sciences Department,1 Cyclotron Road MS 51-208, Berkeley, CA 94720
AU: Cohen, R C
EM: rccohen@berkeley.edu
AF: University of California, Berkeley, Department of Chemistry, Berkeley, CA 94720-1460 United States
AU: Goldstein, A H
EM: ahg@nature.berkeley.edu
AF: University of California, Berkeley, Department of Environmental Science, Policy and Management, Berkeley, CA 94107-3110 United States
AU: Harley, R A
EM: harley@ce.berkeley.edu
AF: University of California, Berkeley, Department of Civil and Environmental Engineering, Berkeley, CA 94720-1710 United States
AB: We investigate the impacts of future climate change on biogenic VOC emissions in California and their effects on regional air quality. For present-day simulations, we utilize a detailed, California-specific emissions inventory system (BEIGIS) to estimate isoprene, monoterpene, and methylbutenol fluxes. We use these emissions in a five-day air quality simulation using the Community Multiscale Air Quality Model (CMAQ) during a summer ozone episode in 2000. For the future climate scenario, we use projected temperatures from an ensemble 2xCO₂ regional climate model run to calculate biogenic emissions under an increased temperature scenario, causing emissions to increase from 20-30% along the coast and in the Central Valley, and up to 45% in the Sierra Nevada mountains. These increases in biogenic VOC emissions cause the daily maximum ozone to increase up to 2 ppb along the coastline and in the Central Valley, while ozone in the VOC-rich Sierras decreases slightly (~1 ppb). The greatest impact on ozone occurs in the East Bay region, where increased biogenic emissions increase ozone up to 4 ppb due to high NOx emissions and an increase in HOx cycling.
DE: 0365 Troposphere: composition and chemistry
DE: 0426 Biosphere/atmosphere interactions (0315)
DE: 1631 Land/atmosphere interactions (1218, 1843, 3322)
DE: 1637 Regional climate change
SC: Atmospheric Sciences [A]
MN: Fall Meeting 2005