Article View: sci.geo.fluids
Article #75Back of the envelope CO2 redux....
From: Bryan Hannegan
Date: Thu, 19 Nov 1992 18:20
Date: Thu, 19 Nov 1992 18:20
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In reference to my earlier post on this subject, I'd like to point out a couple of glaring errors on my part that SIGNIFICANTLY affect the result. 1) I had density as 1 kg/m3, actually it should be 10^3 kg/m3. 2) The volume of the ocean was 1.35 x 10^18 g, not 1.35 x 10^15 g. This would then increase the total by a factor of 10^6, making the result 1.52 x 10^11 metric tonnes, or 152 Gt. There are extreme problems with this, which I will point out so as to not leave stones unturned. 1) Temperature,pressure and density were considered constant at 298K, 1 atm, and 1 kg/m3 (figures for pure water at critical temperature) 2) Just the dissolving of CO2 gas was used, there were no chemical reactions taken into account (unlike in Harte, "Consider a Spherical Cow") 3) Based on net response, chemical uptake of CO2 represents more than 90% of the total CO2 content of the ocean, and we all know that assumption #1 is nowhere near reality (but it sure made calculations simple!) I had read that the yearly flux was on the order of Gt and I thought that was an usually large amountof flux for an element. Now I understand. Thanks for all the assitance and all the help. I hope this spawned some good thought. Bryan Hannegan halo.ps.uci.edu
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Newsgroups: sci.geo.fluids Path: arc1-ca.pugleaf.net!sparky!uunet!think.com!ames!nsisrv!hyperion.gsfc.nasa.gov!hannegan From: hannegan@hyperion.gsfc.nasa.gov (Bryan Hannegan) Subject: Back of the envelope CO2 redux.... Message-ID: <1992Nov19.182033.935@nsisrv.gsfc.nasa.gov> Sender: usenet@nsisrv.gsfc.nasa.gov (Usenet) Nntp-Posting-Host: hyperion.gsfc.nasa.gov Organization: Department of Geosciences, University of CA, Irvine Date: Thu, 19 Nov 1992 18:20:33 GMT Lines: 29