[extropy-chat] nuclear winter's back

Anders Sandberg asa at nada.kth.se
Wed Dec 13 16:43:02 UTC 2006

Emlyn wrote:
> I really love that idea. Anyone got an idea on numbers?
> Related... instead of global nuclear winter, could we pollute with
> something a lot more opaque than current fossil fuels, and reduce the
> amount of energy getting through to the planet surface? Modify the
> greenhouse gas emmisions so they act like dark sunglasses?

As Eugene pointed out, sulphur oxide and sulphate particles do a good job.
See the papers:

P. J. Crutzen, Albedo enhancement by stratospheric sulfur injections: a
contribution to resolve a policy dilemma, Climatic Change (2006) 77:

Vaishali Naik, Donald J. Wuebbles, Evan H. DeLuci and Jonathan A. Foley,
Influence of Geoengineered Climate on the Terrestrial Biosphere,
Environmental Management, 32:3 / September, 2003

It is my prediction that within this century we are going to see
unilateral climate improvements by one or more nations if they feel
themselves threatened enough.

Anders Sandberg,
Oxford Uehiro Centre for Practical Ethics
Philosophy Faculty of Oxford University

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