Analysis of ozone in the San Joaquin Valley of California

The dynamics of ozone in the San Joaquin Valley of central California are s tudied by systematic diagnostic runs of the three-dimensional SARMAP Air Qu ality Model. Air quality in the San Joaquin Valley is the result of a compl ex combination of local and transported emissions. Simulations show that re latively brisk winds at points of inflow to the Valley produce a strong dep endence of ozone in the Valley on upwind conditions. Furthermore, NOx influ x from boundaries and local emissions has significantly greater impact on o zone production than ROG influx and emissions. (C) 1999 Elsevier Science Lt d. All rights reserved.