> > Ken > > Sorry to miss your talk Monday in Seattle; I’m out of town for a while. > > I agree with you on the upwelling-only problems—and indeed I have agreed > since about 2005 when you gave a nice talk at the ocean acidification > workshop in Seattle. My cautions about up-only fertilization are in both my > 2008 and 2012 books. So here I am talking *only* of push-pull ocean > pumping. (We physiologists tend to be surrounded by push-pull pumps in the > lab, which is likely why I began exploring pushing down at the same time as > pulling up.) > > Upwelling and downwelling in combination is a different animal than > up-only. For example, increasing surface ocean (and thus atmospheric) CO2 > by pumping deep water up is a problem that goes away with the addition of > simultaneously pushing surface water down. Even if no fertilization results > from pulling up, the DIC pulled up may be only half of the ~1g/m3 DOC > pushed down. With fertilization, one is pumping down both additional > organisms and much more DOC. It’s important to sink this carbon soup before > it has a chance to become surface DIC. > > My illustrative push-pull scheme is, of course, only an idealized sketch. > It will take a Second Manhattan Project of real experts (such as yourself) > to get it right. But my sketch does, I think, show that there is class of > potential solutions that are possibly big enough (600 GtC), fast enough (20 > yr), and secure enough against backsliding (for a millennium) to quality as > a climate repair. > > Unlike anything else on the table, something like this looks capable of > actually reversing the overheating, the acidification, and the thermal > expansion portion of sea level rise. It would seem worth exploring. > -Bill [email protected]
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