My idea for stratosheric aerosol generated from aircraft fuel (1) came from
reading papers showing the warming during the three day period after 9-11
when there were no contrails over the US.
That was long before I had heard the word geoengineering or about volcanoes,
SO2, Alan Robock or Paul Crutzen. -or this group!
I later heard that there were other papers suggesting that contrails caused
warming. I put some effort into trying to work out which was correct but
eventually gave up , concluding that there were equal numbers of papers
suggesting that contrails caused warming or cooling. I very much doubt that
this has added more than one bit of paper to one side of the balance.
There was even a paper suggeting that commercial flights should be limited
to 20,000 feet. I cant remember why.
john gorman
(1) www.naturaljointmobility.info/grantproposal09.htm
----- Original Message -----
From: "John Nissen" <[email protected]>
To: "Geoengineering" <[email protected]>
Sent: Wednesday, March 30, 2011 11:04 PM
Subject: [geo] Contrails bad?
http://planetark.org/wen/61626
John
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