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"Tropospheric ozone in CMIP6 simulations" by Paul T. Griffiths, Lee T. Murray et al.

The evolution of tropospheric ozone from 1850 to 2100 has been studied using data from Phase 6 of the Coupled Model Intercomparison Project (CMIP6). We evaluate long-term changes using coupled atmosphere-ocean chemistry-climate models, focusing on the CMIP Historical and ScenarioMIP ssp370 experiments, for which detailed tropospheric-ozone diagnostics were archived. The model ensemble has been evaluated against a suite of surface, sonde and satellite observations of the past several decades and found to reproduce well the salient spatial, seasonal and decadal variability and trends. The multi-model mean tropospheric-ozone burden increases from 247±36 Tg in 1850 to a mean value of 356±31 Tg for the period 2005-2014, an increase of 44 %. Modelled presentday values agree well with previous determinations (ACCENT: 336±27 Tg; Atmospheric Chemistry and Climate Model Intercomparison Project, ACCMIP: 337±23 Tg; Tropospheric Ozone Assessment Report, TOAR: 340±34 Tg). In the ssp370 experime ....

Coupled Model Intercomparison Project , Atmospheric Chemistry , Climate Model Intercomparison Project , Tropospheric Ozone Assessment Report ,