Figure 3 - Simulated changes in ozone-loss species in response to large H2S and CH4 releases.

From the following article

End-Permian ozone shield unaffected by oceanic hydrogen sulphide and methane releases

Michael B. Harfoot, John A. Pyle & David J. Beerling

Nature Geoscience 1, 247 - 252 (2008) Published online: 23 March 2008

doi:10.1038/ngeo154

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a,b, Changes in NOx mixing ratios (a) and HNO3 mixing ratios (b) by latitude and altitude with a simulated 15,000 Tg S yr-1 release of H2S from anoxic oceans compared with the control (2 Tg S yr-1) simulation, calculated with the 2D model for end-Permian conditions. c,d as a,b, but for simulations that include a simultaneous large CH4 release (840 Tg yr-1).

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