Improved simulation of tropospheric ozone by a global-multi-regional two-way coupling model system

Global simulation of tropospheric O3-NOx-hydrocarbon chemistry 2. Model evaluation and global ozone budget

Results from a global three-dimensional model for tropospheric O3-NOx-hydrocarbon chemistry are presented and evaluated with surface, ozonesonde, and aircraft measurements. Seasonal variations and regional distributions of ozone, NO, peroxyacetylnitrate (PAN), CO, ethane, acetone, and H2O2 are examined. The model reproduces observed NO and PAN concentrations to within a factor of 2 for a wide r...

Effects of tropospheric emissions on global tropospheric ozone distribution: A CTM simulation study

In this work, we examined the effect of tropospheric emissions on tropospheric 1 ozone (O3) by conducting three-dimensional (3D) chemistry transport model (CTM) 2 simulations. For the control run, the CTM model simulates tropospheric O3 levels with 3 a complete set of anthropogenic, biomass burning, and vegetation emissions [8]. For the 4 no-emission simulation, all anthropogenic, biomass burni...

An improved global zenith tropospheric delay model

A global tropospheric ozone climatology from trajectory-mapped ozone soundings

A global three-dimensional (i.e. latitude, longitude, altitude) climatology of tropospheric ozone is derived from the ozone sounding record by trajectory mapping. Approximately 52 000 ozonesonde profiles from more than 100 stations worldwide since 1965 are used. The small number of stations results in a sparse geographical distribution. Here, forward and backward trajectory calculations are per...

Clouds, photolysis and regional tropospheric ozone budgets

We use a three-dimensional chemical transport model to examine the shortwave radiative effects of clouds on the tropospheric ozone budget. In addition to looking at changes in global concentrations as previous studies have done, we examine changes in ozone chemical production and loss caused by clouds and how these vary in different parts of the troposphere. On a global scale, we find that clou...