Ship traffic terminates in busy ports, but on the high seas, they are relatively dispersed, and cross winds serve to distribute the sulphur and / or resulting aerosols.
I remain of the opinion that making this change without good science is an extremely risky thing to do. A On 14 Aug 2014 16:43, "Mike MacCracken" <[email protected]> wrote: > I was asked by a colleague about what is expected to happen as marine > bunker > fuels are desulfurized over the coming several years. My first response was > that it would reduce the SO2 emissions and so the sulfate, and since > sulfate > adds to cooling, this would suggest the desulfurization would lead to a > warming influence. > > But then, the key to cloud brightening is addition of CCN in relatively > unpolluted regions (so yes, over remote oceans), but is not much of the > ship > traffic in relatively polluted regions? Experiments do seem to indicate > that > over-saturation of CCN tends to lead to cloud clearing--so basically we are > in the Goldilocks situation--one needs to have neither too few CCN nor too > many to get cloud brightening. > > So, might it be that in some polluted regions, reducing the SO2 emissions > from marine sources might actually lead to an increase in clouds/cloud > brightness? Has anyone done a really careful analysis of this? Do we really > have good quantitative estimates of what might happen? And how might all of > this play out as the other sources of SO2 are changing? > > Perhaps Stephen Salter, John Latham, Alan Gadian, et al. have a paper(s) on > this that I have missed. > > Mike MacCracken > > > -- > You received this message because you are subscribed to the Google Groups > "geoengineering" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To post to this group, send email to [email protected]. > Visit this group at http://groups.google.com/group/geoengineering. > For more options, visit https://groups.google.com/d/optout. > -- You received this message because you are subscribed to the Google Groups "geoengineering" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/geoengineering. For more options, visit https://groups.google.com/d/optout.
