Surface-level ozone pollution causes crop production loss by directly reducing healthy green leaf area available for carbon fixation. Ozone and its precursors also affect crop photosynthesis indirectly by decreasing solar irradiance. Pollutants are reported to have become even more severe in Eastern China over the last ten years. In this study, we investigated the effect of a combination of ele...

Surface ozone (O3) is a secondary air pollutant, harmful to human health and vegetation. To provide long-term study of O3 concentrations in Portugal (study period: 2009–2019), statistical analysis trends rural stations (where the highest can be found) was first performed. Additionally, effect nitrogen oxides (NOx) meteorological variables on were evaluated different environments northern Portug...

Vertical gradients of mixing ratios of volatile organic compounds have been measured in a Ponderosa pine forest in Central California (38.90 N, 120.63 W, 1315 m). These measurements reveal large quantities of previously unreported oxidation products of short lived biogenic precursors. The emission of biogenic precursors must be in the range of 13–66μmol m−2 h−1 to produce the observed oxidation...

Atmospheric Chemistry and Physics Discussions This discussion paper is/has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP if available. Abstract Sea-land and mount-valley circulations are the dominant mesoscale synoptic systems affecting the Beijing area during summertime. Under the influence of these two circulati...

[1] Long-range transport of air across the European and Asian continents brings substantial quantities of ozone and other oxidants to northeast Asia from upwind sources over Europe and North America. This transport differs significantly from that over the Pacific and Atlantic Oceans because of weaker and less frequent frontal systems over the continent and because of weaker convective lifting o...

Influence of convective transport on tropospheric ozone and its precursors in a chemistry-climate model R. M. Doherty, D. S. Stevenson, W. J. Collins, and M. G. Sanderson Institute of Atmospheric and Environmental Science, University of Edinburgh, Edinburgh, UK Hadley Centre for Climate Prediction and Research, Met Office, Exeter, UK Received: 1 April 2005 – Accepted: 9 May 2005 – Published: 7 ...

To evaluate the impact of emission change in East Asia on the surface ozone concentration and crop yield loss especially for wheat and rice, we developed a one-way nested global–regional chemical transport model, and conducted 1–year calculations with emission inventories for 2000 and 2020. The model consisted of global and regional CTMs. The global CTM was based on the chemical atmospheric gen...

The sensitivity of ozone production to precursor emissions was investigated under five different meteorological conditions in the Mexico City Metropolitan Area (MCMA) during the MCMA-2006/MILAGRO field campaign using the gridded photochemical model CAMx driven by observation-nudged WRF meteorology. Precursor emissions were constrained by the comprehensive data from the field campaign and the ro...

In airsheds that contain high volatile organic compounds (VOCs) and low NOx (=NO+NO2) concentrations, ozone (O3) production may be significantly suppressed by NOx reactions that lead to the formation of organic nitrates. O3 and its precursors (VOCs and NOx) ambient levels simulated using a regional-scale photochemical model, called Multiscale Air Quality Simulation Platform, are analyzed and co...