"Steve Schulin" wrote in message
...
A pdf of the paper which prompts Roger's exaggerated thread title is
available at http://www.pnas.org/cgi/reprint/0504949102v1

Despite the great improvements in climate modeling over since the first
IPCC report, the predictive value of such simulations remain dubious at
best for purposes of policy. The modelers know that their solutions are
nonunique -- even when they use a reasonable description of reality,
their model is only one of many possible descriptions.

If you can demonstrate that these models yield *mathematically* nonunique
answers, that's as far as you need to go. A mathematically nonunique answer
has the following properties:

* it is pure crap, because the associated program converges to a
mathematically infinite number of solutions
* it is missing some kind of dependency, meaning that there are unrealized
and unmodeled equations/constraints

Your comment is about as strong of a negative comment as you can make from a
mathematical perspective. Can you back it up?


Here's how the
authors put it in the body of the paper: "... the increasing
destabilization of the terrestrial carbon sink with warming and drying
as modeled by coupled carbon*climate models such as presented here is
qualitatively plausible ..."

Very truly,

Steve Schulin
http://www.nuclear.com

In article .com,
"Roger Coppock" wrote:

Faster carbon dioxide emissions will overwhelm capacity of land and
ocean to absorb carbon

By Robert Sanders, Media Relations, 02 August 2005

BERKELEY - One in a new generation of computer climate models that
include the effects of Earth's carbon cycle indicates there are limits
to the planet's ability to absorb increased emissions of carbon
dioxide.

If current production of carbon from fossil fuels continues unabated,
by the end of the century the land and oceans will be less able to take
up carbon than they are today, the model indicates.

The Earth's various sources and sinks for carbon. The land and oceans
can absorb some of the increased carbon from fossil fuel emissions, but
as the emission rate increases, these sinks saturate and become less
effective at removing carbon from the atmosphere. (Graphics by Inez
Fung/UC Berkeley)

"If we maintain our current course of fossil fuel emissions or
accelerate our emissions, the land and oceans will not be able to slow
the rise of carbon dioxide in the atmosphere the way they're doing
now," said Inez Y. Fung at the University of California, Berkeley, who
is director of the Berkeley Atmospheric Sciences Center, co-director of
the new Berkeley Institute of the Environment, and professor of earth
and planetary science and of environmental science, policy and
management. "It's all about rates. If the rate of fossil fuel emissions
is too high, the carbon storage capacity of the land and oceans
decreases and climate warming accelerates."

Fung is lead author of a paper describing the climate model results
that appears this week in the Early Online Edition of the Proceedings
of the National Academy of Sciences (PNAS). Fung was a member of the
National Academy of Sciences panel on global climate change that issued
a major report for President Bush in 2001 claiming, [ . . . ]

For the rest of this artilce see:
http://www.berkeley.edu/news/media/r...2_carbon.shtml
http://www.sciencedaily.com/releases...0804050702.htm