Maybe I do not appreciate fully how the models have evolved since 1990. I
have studied the reports and even for me it's it'd very complicated. Do you
mind giving me a simple explanation of what you are referring to?


On 29 December 2017 at 21:28, uǝlƃ ☣ <geprope...@gmail.com> wrote:

> I agree that admitting one's mistakes and specifying (honest) uncertainty
> lends credibility.  But, as Eric says in his recent post, expressions of
> uncertainty can be abused, as well.  In this regard, scientists face a very
> difficult dilemma.
>
> It's interesting to consider a topic just as controversial to scientists,
> but opaque to the laity: the big bang and inflation.  I think it's pretty
> clear there was no big bang, at least not as naively conceived.  When one
> cosmologist talks to another, they probably freely admit that.  But when a
> cosmologist talks to a regular person, of course there was a big bang.
>
> So, it's easy to see why the IPCC would hesitate to proclaim their
> uncertainty very loudly.  Their conclusions could easily be lost.
>
> But more to your point, yes, their predictions from 1990 were bound to be
> wrong to some extent (as are all predictions).  Their new predictions will
> be wrong, too.  And it's good for everyone to know the full dimension of
> the predictions.  However, what you didn't mention was the extent to which
> the models have *evolved* from 1990 to 2014 (and 2014 to today).  What we
> need is a fuller understanding of the modeling workflow.  All models are
> iteratively constructed.  Do you know how the models have evolved from 1990
> to today?
>
>
> On 12/29/2017 11:16 AM, Pieter Steenekamp wrote:
> > In 1990 the IPCC predicted a temperature increase of 0.3
> degrees centigrade per decade. In 2014 they reported an actual increase of
> 0.05 degrees centigrade for the previous 15 years.
> >
> > Maybe they are right in their new disaster predictions? IMO it would
> give them some credibility if they admit the uncertainties.
>
>
> --
> ☣ uǝlƃ
>
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