Not biomass burning but stratospheric intrusion dominating tropospheric ozone over the Tibetan Plateau

Reply to Yang et al.: Biomass burning is an important tropospheric source of ozone in remote regions of the globe

“…Therefore, we suggest that the analysis by Yang et al. ( 2 ) in no way contradicts the conclusions of Bourgeois et al. ( 1 ) that biomass burning is a larger source of tropospheric ozone than previously understood and that the findings by Yang et al.…”

“…Thus, the finding of Yang et al. ( 2 ) that stratospheric air has a large influence in specific locations, particularly at high altitude, is entirely plausible. Another major finding of Bourgeois et al.…”

“…That Yang et al. ( 2 ) also have a model that shows little influence of biomass burning but a significant influence of stratospheric air mixing on ozone in the Tibetan Plateau is, therefore, not a surprise.…”

“…Conversely, Yang et al. ( 2 ) do not exclude stratospherically influenced air in order to isolate tropospheric sources, and Yang et al. ( 2 ) do not consider the influence of anthropogenic or urban sources.…”

“…( 2 ) do not exclude stratospherically influenced air in order to isolate tropospheric sources, and Yang et al. ( 2 ) do not consider the influence of anthropogenic or urban sources. Their isotopic analysis points to a large influence from the stratosphere to surface ozone in Tibet, a finding not at all in contrast to Bourgeois et al.…”