Prof. Beget -- 1) can you please explain the scale of operations that would be required to achieve climatically significant reductions?
2) is there a termination scenario where SRM/CDR efforts including MEA are abruptly terminated (say, because of political disorder), warming accelerates, the captured MEA gets wet, and the captured CO2 is released again? Fred Z ᐧ On Mon, Oct 27, 2014 at 9:12 PM, Ronal W. Larson <[email protected]> wrote: > Andrew, Professor Beget, and List: > > I can’t answer either of Andrew’s questions - but the idea seems to be > novel - and should be quite cheap to test many places. > > Prof. Beget: The Antarctic environment would be needed to understand > the moisture/lifetime issues, but a small test on the right altitudes for > creating a “snow”, the rate of fall, etc should be relatively easy with a > small plane in Alaska. Have you done any testing yet? > > Ron > > > On Oct 27, 2014, at 6:19 PM, Andrew Lockley <[email protected]> > wrote: > > Poster's note : maybe I'm missing something, but this seems neither safe > nor practical to me > > https://agu.confex.com/agu/fm14/preliminaryview.cgi/Paper28515.html > > 2014 AGU Fall Meeting > December 15 - 19, 2014 > > Menu > > Antarctic Pumpdown---a New Geoengineering Concept for Capturing and > Storing Atmospheric Carbon Dioxide > > James E Beget, University of Alaska Fairbanks, Fairbanks, AK, United States > > Abstract: > > Growing concentrations of carbon dioxide in the atmosphere are increasing > global temperatures. This is projected to impact human society in negative > ways. Multiple geoengineering approaches have been suggested that might > counteract problems created by greenhouse warming, but geoengineering > itself can be problematic as some proposed methods would pose environmental > risks to the oceans, atmosphere, and biosphere. I propose a new approach > that would remove CO2 from the atmosphere and store it in the > cryosphere. Carbon dioxide would be captured by seeding the atmosphere over > a designated small region of central Antarctica with monoethanolamine > (MEA), a well known compound commonly used for CO2capture in submarines and > industrial processes. Monoethanolamine captures and retains carbon dioxide > until it encounters water. Because MEA crystals are stable when dry, they > would fall from the atmosphere just in the local area where the seeding is > done, and they would be naturally buried by snowfalls and preserved in the > upper parts of the East Antarctic Ice Sheet, where thawing does not occur. > The carbon dioxide removed from the atmosphere by this process could reside > safely in this geologic reservoir for thousands of years, based on known > flow characteristic of the ice sheet. Also, carbon dioxide stored in this > way could be recovered in the future by drilling into the ice sheet to the > frozen storage zone. The CO2 Antarctic Pumpdown (CAP) concept could > potentially be used to stabilize or reduce the amount of carbon dioxide in > the atmosphere, and then to store the carbon dioxide safely and > inexpensively in a stable geologic reservoir > > -- > 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. > -- 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.
