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Re: [school-discuss] a way for humans to control global warming without a behavior change ?
Logic. And this semester, Internet Server Security.
mike eschman wrote:
> hello Cameron,
> what do you teach ?
> mike eschman, etc ...
> On Tuesday 03 September 2002 10:47 am, Cameron Miller wrote:
>>Maybe this stuff can be better directed to some of the 28,000 sites
>>mike eschman wrote:
>>> Media Alerts Stories Archive --->
>>>August 20, 2002
>>>LIVERMORE RESEARCHERS SHOW DEPTH OF INJECTED CO2 INTO THE OCEAN CRITICAL
>>>AS A GLOBAL WARMING SOLUTION
>>>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,"
>>>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