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Re: [school-discuss] a way for humans to control global warming without a behavior change ?

Maybe this stuff can be better directed to some of the 28,000 sites 
listed here:


- cameron

mike eschman wrote:
>   Media Alerts Stories Archive ---> 
> http://earthobservatory.nasa.gov/Newsroom/MediaAlerts/2002/2002082010367.html
> August 20, 2002
> LIVERMORE, Calif. ? Researchers from the Lawrence Livermore National 
> Laboratory have determined that the depth of an injection of carbon dioxide 
> into the deep ocean is a good predictor of how effective that location is at 
> sequestering carbon away from the atmosphere.
> Direct injection of CO2 into the deep ocean has been proposed as a way to slow 
> the accumulation of carbon dioxide in the atmosphere, one of the causes of 
> global warming. In the direct injection scenario, fossil-fuel carbon dioxide 
> is injected into the ocean interior, bypassing the mixing processes that 
> would otherwise cause a relatively slow transfer of excess atmospheric CO2 in 
> to the deep ocean.
> In a study released today in Geophysical Research Letters, Ken Caldeira and 
> Philip Duffy of the Climate and Carbon Cycle Modeling Group and Michael 
> Wickett of the Center for Applied Scientific Computing, all at Livermore, 
> show that the depth, rather than radiocarbon, is a relatively good predictor 
> of the effectiveness of CO2 injection.
> The researchers studied both radiocarbon dating (typically used to date 
> anthropologic items) and the depths of injection to determine the 
> effectiveness of direct CO2 injection as a carbon sequestration strategy.
> Scientists used one-dimensional box-diffusion models and three-dimensional 
> simulations run under the radiocarbon and sequestration scenarios described 
> in Livermore's Ocean Carbon-cycle Model Intercomparison Project protocols.
> "These simulations indicate that the amount of time it takes for a water 
> parcel to return to the ocean surface increases with depth, but is not 
> related to the amount of time since that parcel was last at the surface," 
> Duffy said.
> Injections were simulated at 800 meters, 1500 meters and 3000 meters for 100 
> years near the Bay of Biscay, New York City, Rio de Janeiro, San Francisco, 
> Tokyo, Jakarta and Bombay.
> The models showed that injection at 3000 meters is quite effective at 
> sequestering carbon from the atmosphere for several centuries while 
> injections at shallower depths are less effective. In general, injections 
> into the Pacific Ocean (San Francisco and Tokyo) were more effective than 
> injection at the same depth in the Atlantic Ocean (New York City, Rio de 
> Janeiro and the Bay of Biscay).

- cameron miller
- UNIX Systems Administrator
- Outhouse Attendant
- http://portal.adams.edu/outhouse/
- cdmiller@adams.edu