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

[mike eschman <meschman@engima.com>]

hello,

this post was for k-12 science teachers, not you.
the people on the global warming mailing list know about this stuff.
sorry it didn't interest you,

thanks.

mike eschman, etc ...


On Tuesday 03 September 2002 11:07 am, Cameron Miller wrote:
> Logic.  And this semester, Internet Server Security.
>
> - cameron
>
> 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
> >>listed here:
> >>
> >>http://www.google.com/search?q=Global+Warming+Mailing+List
> >>
> >>- cameron
> >>
> >>mike eschman wrote:
> >>>  Media Alerts Stories Archive --->
> >>>http://earthobservatory.nasa.gov/Newsroom/MediaAlerts/2002/2002082010367
> >>>. html
> >>>
> >>>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," 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).