Articles | Volume 16, issue 19
Research article
05 Oct 2016
Research article |  | 05 Oct 2016

Global tropospheric hydroxyl distribution, budget and reactivity

Jos Lelieveld, Sergey Gromov, Andrea Pozzer, and Domenico Taraborrelli

Data sets

Atmospheric hydroxyl distribution from EMAC/MOM model Sergey Gromov, Domenico Taraborrelli, Andrea Pozzer, and Jos Lelieveld

Short summary
The self-cleaning capacity of the atmosphere is controlled by hydroxyl (OH) radicals in the troposphere. There are primary and secondary OH sources, the former through the photodissociation of ozone, the latter through OH recycling. We used a global model, showing that secondary sources are larger than assumed previously, which buffers OH. Complementary OH formation mechanisms in pristine and polluted environments, connected through transport of ozone, can maintain stable global OH levels.
Final-revised paper