Cooper, O. R., D. D. Parrish, J. R. Ziemke, N. V. Balashov, M. Cupeiro, I. E. Galbally, S. Gilge, L. W. Horowitz, N. R. Jensen, J. Lamarque, V. Naik, S. Oltmans, J. Schwab, D. Shindell, A. M. Thompson, V. Thouret, Y. Wang, and R. M. Zbinden (2014), review, Elementa: Science of the Anthropocene  • , 2, 29, doi:10.12952/journal.elementa.000029.

Tropospheric ozone plays a major role in Earth’s atmospheric chemistry processes and also acts as an air pollutant and greenhouse gas. Due to its short lifetime, and dependence on sunlight and precursor emissions Associate Editor from natural and anthropogenic sources, tropospheric ozone’s abundance is highly variable in space and time Paul Palmer, The University of on seasonal, interannual and decadal time-scales. Recent, and sometimes rapid, changes in observed ozone Edinburgh mixing ratios and ozone precursor emissions inspired us to produce this up-to-date overview of tropospheric ozone’s global distribution and trends. Much of the text is a synthesis of in situ and remotely sensed ozone observations reported in the peer-reviewed literature, but we also include some new and extended analyses using well-known and referenced datasets to draw connections between ozone trends and distributions in different regions of the world. In addition, we provide a brief evaluation of the accuracy of rural or remote surface ozone trends calculated by three state-of-the-science chemistry-climate models.

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