onlooker wrote:https://www.forbes.com/sites/startswithabang/2018/02/06/sorry-earth-the-ozone-layer-isnt-healing-itself-after-all/
Sorry, Earth, The Ozone Layer Isn't Healing Itself After All
Here is one of the causes of this effect:
https://agupubs.onlinelibrary.wiley.com ... 18JD029400https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4981078/Short lived chlorine compounds can make it into the lower most stratosphere but are not significant above.
Another effect that I will speculate is important is the increasing trend in H2O in the lower most stratosphere due to warming. This extra H2O burden results in more ice clouds (cirrus). Ice clouds do not just from below the tropopause but above it as well since they are not convective clouds. Any ice surface area in the lower most stratosphere will provide a heterogeneous chemical reaction surface for O3 destruction. This is related to the PSCs in the polar night but less intense. Surface chemistry is peculiar since there is a Gibbs free energy impact on chemical potentials due to unbalanced EM forces. One phase of matter separated from another by a sharp surface is different for molecules in terms of Van der Waals forces compared to being inside a continuous phase. Surface tension is one such effect. The Laplace pressure differential for nano-particles is enormous: a 6 nm spherical liquid drop has a Laplace pressure of 10,000 atmospheres. That is why nano-emulsions kill bacteria and aerosol nano-particles enter directly into the blood stream after literally shredding through the lung cell membrane.