I am posting something a received from a global warming fanatic. I want you to read it. Why? Because it impresses me with the sincerity and profundity of his fanaticism, that’s why. And the policy outcomes are all based on what happens to the computer models, based on certain assumptions. A lesson there, perhaps?
(What follows is from the AGW doomsayer.)
[Here is an excellent article that puts in stark perspective the
challenges we face with future global warming. The insouciance of
politicians and the public to this imminent threat is startling to
mind, especially in countries like The Netherlands and Australia which
will likely to be the first countries to suffer the disastrous
consequences of climate change in the next few years (not decades, but
years).
We have been lulled into a false sense of security that climate
change will be a gradual process of slightly warmer summers and milder
winters. More importantly economists assure us that minor impositions
such as carbon taxes or cap and trade and some token attempts at
energy efficiency are all we need to address this problem. Nobody is
paying heed to the non-zero possibility of the black swan where we
face a rapid series of global catastrophic tipping points.
As I have blogged in the past the probability of these threats may be small, but
they are real. In every aspect of society we need to start to plan on
how to survive global warming and do some minimum analysis on the
worst possible outcomes. The Internet may be the critical information
medium for communication and survival in this coming age of climate
uncertainty.
Designing networks to survive climate change is a first
step http://goo.gl/srJGy-- BSA]
http://www.grist.org/article/2011-02-09-smackdown-climate-science-vs-climate-economics
“Climate scientists are becoming increasingly panicked as new
evidence rolls in and just about every bit is worse than the last. The
impacts of climate change are coming faster and harder than most
models predicted, and there’s a real — if maddeningly difficult to
quantify — risk of civilization-threatening scenarios that sound like
bad sci-fi movies.
The standard line among climate hawks is that science recommends “80
percent reduction of greenhouse gas emissions by 2050.” (That’s for
developed world countries; globally, the target is 50 percent by
2050.)
But that recommendation is based on the last IPCC report, which
is by all accounts woefully conservative, especially given that the
science since then has been uniformly grim. There’s good reason to
think these official consensus forums underestimate the severity of
the problem.
To get back below the more ambitious target of 350 ppm of CO2 in the
atmosphere (which we’re already well above), the U.S. and other rich
countries will probably have to get close to zero carbon by 2050, with
the developing world not far behind.
Few people understand how brain-explodingly ambitious that is.
Certainly no one in the U.S. political establishment. Whether you
think it’s necessary and affordable in the grand scheme of things (I
do), there’s no denying it’s a huge honking lift. (Watch the video of
super-nerd Saul Griffith over on the right for a taste. It will change
your life.)
[…]
From what economists tell us, it looks like the worst thing
policymakers risk on climate change is somewhat slower economic
growth. One way or another, we’re getting wealthier.
This represents what is perhaps the foundational faith of modern
economics: a faith in human adaptability and ingenuity. Especially via
the distributed decision making represented by open markets, humans
can master almost any circumstances given time. (For a recent example
of this optimism on Grist, see economist Matthew Kahn.)
Nowhere in these models will you find any hint of Diamond- or
Lovelock-style apocalypse. Instead, future people will be much
wealthier and, because of that, better able to cope with the problem.
[…]
Is climate change truly an existential threat — an immediate danger
and a small but growing risk of substantial societal collapse? Or is
it a creeping change to which humanity needs to make a carefully
calibrated, economically optimized response as it continues to
flourish? How do we fit these two visions in our heads? And more
importantly, what, given these different visions, should we do?
And the winner is …
Of course, economists would tell you that they have reconciled those
stories — that’s what the models do. The damages of climate change
are built right in. The results don’t look like catastrophe because,
dammit, Man Will Overcome.
Anyway, that’s what the models will tell you. But if you talk to the
economists themselves, they’re not quite as gung ho. For one thing,
they will admit that their models aren’t very good at incorporating
large short-term shocks. The “long tail” possibilities in climate
science — the low-probability, high-impact stuff like ice shelves
collapsing or thermohaline circulation shutting down — completely
borks the models. You start seeing wild, arbitrary swings in model
projections based on small adjustments in input assumptions. The
models start saying, in essence, “hell if I know!”
Unfortunately, that leaves the field to economists like William
Nordhaus, whose model tells a soothing story of slowly rising costs,
smoothly offset by a slowly rising carbon tax. The message: don’t
panic. That message is all too welcome in the halls of power.
——
As you can see, if you have read this far, is that models (where all the inputs and fudge factors are human constructs) drive the apocalypse. My models break down under these assumptions! So reduce global GHG emissions by 50% by year “n” because my computer crashes! As Steve McIntyre pointed out in one of his books, we cannot even model a thunderhead, let alone a climate system.