Reconstructing Climatic and Environmental Changes" FOIA Email 5.19.03 (c)

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SUBJECT:: EPW: CLIMATE CHANCE
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TO:"Catanzaro, Michael (EPW)" <Michael
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BCC:Dafla N. Perino ( CN=Dana M. Perino
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TEXT:
THE SCIENCE OF CLIMATE CHANCE
Institute on the "hockey stick
An excerpt from the Competitive Enter rise
theory' of global warming:
[U ited Nations Third Assessment Report
"The main propaganda device of the
graph.' The graph is a
on climate change] is the 'hockey stick
rings dating back to 1000 AD and
temperature record derived from tree
c ntury thermometer-based temperature
running through 1900, with the 20th
to show that global temperatures have
data attached at the end. It claims
ng the last millennium until the
remained steady or even decreased dur warming represented by the
industrial age, when there was an anomalous
stick is largely bogus, however.
blade of the hockey stick. The hocke. be
nearly any temperature trend could
The margin of error is so large that
drawn to fit within it.
ey stick to claim that current
"Global warming alarmists use the hoc
:ime in the last 1,000 years. The
warming is greater than at any other
tle Ice Age (LIA) were two naturally
Medieval Warm Period (MWP) and the Li
nnium where the range of global
occurring events during the last mill
tfte 20th century. During the MWP,
temperature change exceeded that of
they are today. The MWP, however,
global temperatures were higher than
graph.
does not show up in the hockey stick
been dismantled by, among others,
"The hockey stick theory has effectively
S on of Harvard in their recently
Dr. Sallie Baliunas and Dr. Willie
climate studies. Also,
published meta-analysis of 240 peer-ieviewed observatory, argued in
Earth
Wallace Broecker, of the Lamont-Doheity indeed global phenomena.
Science magazine that the MWP and thE LIA were
notes, 'A recent, widely cited
Referring to the hockey stick, Broecker
that the 20th century warming was
reconstruction leaves the impression
It shows no hint of the Medieval Warm
unique during the last millennium.
during which the Vikings colonized
Period (from around 800 to 1200 A.D.)
event was regional rather than
Greenland, suggesting that this warm
just at the dawn of the Industrial
global. It also remains unclear why
o- substantial amounts of anthropogenic
Revolution and before the emission
Temperature began to rise steeply.'"
[manmade) greenhouse gases, Earth's
8/14/2003
file://DASEARCHi739-03-CEQ0
5 8_&txO j g0o3sceq.txt