Quantifying the tropospheric ozone radiative effect and its temporal evolution in the satellite era
oleh: R. J. Pope, R. J. Pope, A. Rap, M. A. Pimlott, B. Barret, E. Le Flochmoen, B. J. Kerridge, B. J. Kerridge, R. Siddans, R. Siddans, B. G. Latter, B. G. Latter, L. J. Ventress, L. J. Ventress, A. Boynard, A. Boynard, C. Retscher, W. Feng, W. Feng, R. Rigby, R. Rigby, S. S. Dhomse, S. S. Dhomse, C. Wespes, M. P. Chipperfield, M. P. Chipperfield
| Format: | Article |
|---|---|
| Diterbitkan: | Copernicus Publications 2024-03-01 |
Deskripsi
<p>Using state-of-the-art satellite ozone profile products, and a chemical transport model, we provide an updated estimate of the tropospheric ozone radiative effect (TO<span class="inline-formula"><sub>3</sub></span>RE) and observational constraint on its variability over the decade 2008–2017. Previous studies have shown the short-term (i.e. a few years) globally weighted average TO<span class="inline-formula"><sub>3</sub></span>RE to be 1.17 <span class="inline-formula">±</span> 0.03 W m<span class="inline-formula"><sup>−2</sup></span>. However, from our analysis, using decadal (2008–2017) ozone profile datasets from the Infrared Atmospheric Sounding Interferometer, average TO<span class="inline-formula"><sub>3</sub></span>RE ranges between 1.21 and 1.26 W m<span class="inline-formula"><sup>−2</sup></span>. Over this decade, the modelled and observational TO<span class="inline-formula"><sub>3</sub></span>RE linear trends show a negligible change (e.g. <span class="inline-formula">±</span> 0.1 % yr<span class="inline-formula"><sup>−1</sup></span>). Two model sensitivity experiments fixing emissions and meteorology to 1 year (i.e. start year – 2008) show that temporal changes in ozone precursor emissions (increasing contribution) and meteorological factors (decreasing contribution) have counteracting tendencies, leading to a negligible globally weighted average TO<span class="inline-formula"><sub>3</sub></span>RE trend.</p>