. . . . and how would you get it back down if things got too cold
because of another Tambora?
Stephen
Emeritus Professor of Engineering Design. School of Engineering,
University of Edinburgh, Mayfield Road, Edinburgh EH9 3DW, Scotland
s.sal...@ed.ac.uk, Tel +44 (0)131 662 1180 WWW.homepages.ed.ac.uk/shs,
YouTube Jamie Taylor Power for Change
On 10/04/2020 17:31, Alan Robock ☮ wrote:
Dear Andrew,
I'm not sure I understand. How do you propose to put the sulfate into
the stratosphere? And will you be personally responsible for your
share of the risks associated with the impacts?
Alan
Alan Robock, Distinguished Professor
Associate Editor, Reviews of Geophysics
Department of Environmental Sciences Phone: +1-848-932-5751
Rutgers University E-mail:rob...@envsci.rutgers.edu
14 College Farm Roadhttp://people.envsci.rutgers.edu/robock
New Brunswick, NJ 08901-8551 USA ☮http://twitter.com/AlanRobock
On 4/10/2020 12:13 PM, Andrew Lockley wrote:
I've just run some numbers on what my 'personal sulfate budget' might
be. By the calculations below, if a typical person put 10kg sulphate
in the stratosphere for every year of their life, they'd net out
their entire RF carbon footprint for a century.
Obviously, this has a whole pile of caveats and flaws, but is it
vaguely right? Is it a useful concept?
Here's the obvious caveats:
Need temporally and spatially even distribution
Doesn't work once CO2 forcing very high
Assumes full offset of future emissions, nil of historic
Termination shock, ocean acidification, Etc.
Andrew
-0.25 (W m-2)/ (Tg-S yr-1) from Wake
1.5 trillion tonnes CO2 historic 2017
https://ourworldindata.org/co2-and-other-greenhouse-gas-emissions#cumulative-co2-emissions
1.6 w/m2 Current RF 2010 (bit out of date)
Approx 1 Tt/W (calculated)
10t/capita/Yr CO2 only (UK), nearly 14 Co2e
https://www.carbonindependent.org/23.html
To Offset everything all historic CO2 6Tg/yr
1 persons annual emissions is 1.5 x 100 billionths of the total ever
emitted
Personal sulfate injection is therefore 6Tg x 1.5 / 100bn = about
100g per year for 1y emissions only
If each person wants to offset a year's emissions for a century
(negating 100y GWP), it's 100x More — ie 10kg per year
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