Aerosols from an eruption cool the climate briefly and then settle out of the atmosphere, whereas greenhouse gases released by volcanism persist longer. Ice sheets thick enough to affect volcanism take many years to accumulate. So this sounds more likely to be a positive- feedback effect to me. But I'm dubious that it even does that: I suspect the effect on volcanism is to trigger (i.e. change the timing of) eruptions that were going to occur anyway, rather than to increase the total amount of either aerosols or greenhouse gases emitted by volcanoes over the time scale needed for accumulation of ice sheets.
On Jan 13, 8:59 pm, "Andrew Lockley" <andrew.lock...@gmail.com> wrote: > When ice sheets melt, they cause a tectonic rebound effect which > induces volcanism. This releases aerosols, which cool the climate. > Is this a well-understood negative feedback mechanism, and has it been > included in modelling? > > (Maybe this is a dumb question, but I can't find an answer elsewhere.) > > A --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "geoengineering" group. To post to this group, send email to geoengineering@googlegroups.com To unsubscribe from this group, send email to geoengineering+unsubscr...@googlegroups.com For more options, visit this group at http://groups.google.com/group/geoengineering?hl=en -~----------~----~----~----~------~----~------~--~---
