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My Nobel Moment
By: John R. Christy
I've had a lot of fun recently with my
tiny (and unofficial) slice of the 2007 Nobel Peace Prize awarded to the lntergovernmental
Panel on Climate Change (IPCC). But, though I as one of thousands of IPCC
participants, I don't think I will add
"0.0001 Nobel Laureate" to my resume.
The other 'half of the prize was awarded
to former Vice President Al Gore, whose carbon footprint would stomp my
neighborhood flat. But that's another story.
Both halves of the award honor
promoting the message that Earth's temperature is rising due to human-based emissions
of greenhouse gases. The Nobel committee praises Mr. Gore and the IPCC for
"alerting us to a potential catastrophe
and for spurring us to a carbonless economy.
I'm sure the majority (but not all) of
my IPCC colleagues cringe when I say this, but I see neither the developing catastrophe
nor the smoking gun proving that human activity is to blame for most of
the warming we see. Rather, I see a
reliance on climate models (useful but never "proof") and the
coincidence that changes in carbon dioxide and global temperatures have loose
similarity over time.
Not all of us climate scientists are
panicked about global warming.
There are some of us who remain so humbled
by the task of measuring and understanding the extraordinarily complex climate
system that we are skeptical of our ability to know
what it is doing and why. As we build
climate data sets, from scratch and look into the guts of the climate system,
however, we don't find the alarmist theory matching observations.
(The National Oceanic and Atmospheric
Administration satellite data we analyze at the University of Alabama in
Huntsville does show modest warming - around 2.5 degrees
Fahrenheit per century, if current warming
trends of 0.25 degrees per decade continue.)
It is my turn to cringe when I hear
overstated confidence from those who describe the projected evolution of global
weather patterns over the next 100 years, especially when
I consider how difficult it is to
accurately predict that system's behavior over the next five days.
Mother Nature simply operates at a
level of complexity that is, at this point, beyond the mastery of mere mortals
(such as scientists) and the tools available to us. As my high school
physics teacher admonished us in
those we-shall-conquer-the-world-with-a-slide-rule days, "Begin all of
your scientific pronouncements with 'At our present level of ignorance,
we think we know . . .”
I haven't seen that type of climate humility
lately. Rather I see jump to conclusions
advocates and, unfortunately, some scientists who see in every weather anomaly
the specter
of a global-warming apocalypse. Explaining each successive phenomenon as a result
of human action gives them comfort and an easy answer.
Others of us scratch our heads and try to understand the real
causes behind what we see. We discount the possibility that everything is
caused by human actions, because everything we've seen the climate do has
happened before. Sea levels rise and fall continually. The
Arctic ice cap has shrunk before. One millennium there are hippos swimming in
the Thames, and a geological blink later there is an ice bridge linking Asia
and
North America.
One of the challenges in studying global
climate is keeping a global perspective, especially when much of the research
focuses on data gathered from spots around the globe. Often observations
from one region get more attention
than equally valid data from another.
The recent CNN report "Planet in
Peril," for instance, spent considerable time discussing shrinking Arc tic
sea ice cover. CNN did not note that winter sea ice around Antarctica
last month set a
record maximum (yes, maximum) for
coverage since aerial measurements started.
Then there is the challenge of translating
global trends to local climate. For instance, hasn't global warming led to the
five-year drought and fires in the U.S. Southwest?
Not necessarily.
There has been a drought, but it would
be a stretch to link this drought to carbon dioxide. If you look at the 1,000-year
climate record for the western U.S. you will see not five-year but
50-year-Iong droughts. The 12th and 13th
centuries were particularly dry. The inconvenient
truth is that the last century has been fairly benign in the American West. A
return to the region's
long-term "normal" climate would
present huge challenges for urban planners.
Without a doubt, atmospheric carbon dioxide
is increasing due primarily to carbon-based energy production (with its
undisputed benefits to humanity) and many people ardently Believe
we must "do something"
about its alleged consequence, global warming.
This might seem like a legitimate concern given the potential disasters that
are announced almost daily, so I've
looked at a couple of ways in which humans
might reduce CO2 emissions and their impact on temperatures.
California and some Northeastern states
have decided to force their residents to buy cars that average 43 miles-per-gallon
within the next decade. Even if you applied this law to the entire world,
the net effect would reduce projected
warming by about 0.05 degrees Fahrenheit by 2100, an amount so minuscule as to be
undetectable. Global temperatures vary more than that from day to day.
Suppose you are very serious about making
a dent in carbon emissions and could replace about 10% of the world's energy
sources with non-CO2-emitting nuclear power by 2020-roughly
equivalent to halving U.S. emissions. Based on IPCC-like projections, the required
1,000. new nuclear power plants would slow the warming by about 0.2 degrees
Fahrenheit per century.
It's a dent.
But what is the economic and human price,
and what is it worth given the scientific uncertainty?
My experience as a missionary teacher in Africa opened my eyes
to this simple fact: Without access to
energy, life is brutal and short. The uncertain impacts of global warming far
in the future
must be weighed against disasters at our
doorsteps today. Bjorn Lomborg's Copenhagen-Consensus 2004, a cost-benefit
analysis of health issues by leading economists (including three Nobelists),
calculated that spending on health
issues such as micronutrients for children, HIV/AIDS and water purification has
benefits 50 to 200 times those of attempting to marginally limit "global
warming."
Given the scientific uncertainty and
our relative impotence regarding climate change, the moral imperative here
seems clear to me.
Mr. Christy is director of the Earth System
Science Center at the University of Alabama in Huntsville and a
participant in the U.N.'s
Intergovernmental Panel on Climate Change, corecipient of this year's Nobel Peace
Prize.
John
Kaighn is a Registered Investment Advisor with Jersey Benefits Advisors and
writes articles on various business and investment information, ideas and
opportunities. For more information
about this and other topics you can visit http://www.johnkaighn.com/and http://www.jerseybenefits.com/
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