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“Wecould be coming out of the colder
phase and into a warmer phase of the
cycle right now. . . It’s probably fair to
say that we’re seeing a component of
natural variability..”

WWW.GLOBALCLIMATE.ORG

Dr. Gerard Bond, Lead Researcher, Lamont
Doherty Earth Observatory, The New York Times,
November 18, 1997.

“Global warming is not proven.”
Sir John Mason, Chair, Graduate School of
Environment, Imperial College’s Center for
Environmental Technology, Reuters World Service,
July 15, 1997

“Thesimple fact is that todays computers
still cannot replicate what is alreadji
known about climate changes over the
past 50 years. When given data on
climate that is a matter of historical
record, the models do not reacb the
correct result.”

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Dr Eogar Berkey, President, Center for Hazardous
Matertals Research, ana Memoer of the U S
Environmental Protecrlon Agency Science Advisory
Board Dayton Daily News, J m e 9, 1997

“I believe there is still great uncertainty
about the climate system response to
increasing levels of greenhouse gases.”
Dr Roy Spencer Meteorolog st ana Team Leader,
NASA Marsna I Space FI gnt Center. lnvesrors
Busmess Dady, Octooer 6, 1997

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“Understanding the current state OJ’the
polar ice sheets is critical for determining
their contribution to sea-level rise and
predicting their response to climate
change. Current estimates from dec-ades
of tide-gauge data indicate a n increase in
global sea level of 10 to 20 cm. over the
past century I t is uncertain, houleve);
uthat the individual contributions oj- tke
polar ice sheets are to sea-leuel rise at
this time.”
C u t t i Davis. Deparrrnent of Electrical Engineer ng,
J n versity of Missour , Craig A Klcrever, Department
of Mechanica and Aerospace Engineering Un versity
of M ssouri and Bruce J r l a nes Jet Propolsion
LaPorarory. Cai forn a InstitJte of Tecnnology, Soence,
Vo 279, March 27, 1998

 “Yes,there have been these big
climate changes. But I think they’re
all natural.”

‘Asyou increase C 0 2 fin the
atnztxphere], you don’t see any
increase in El Nifios.”

Dr William Gray, Climatologist, Colorado
State University, The New York Times,
September 7, 1997.

Dr. Tim Barnett Intergovernmental Panel on
Climate Change, Working Group I , Chapter 8, lead
author on “Detection of Climate Change and
Attribution of Causes,” and Climatologist, Scripps
Institute of Oceanography, The Washington Post,
September 21, 1997.

“Inour view, the NRC [National
Research Council/ panel seriously
underestimates the research efSort
required to reduce the uncertainty in
the aerosol forcing to the speczyied
level.. . In the absence of this research,
knowledge of climate response to
greenhouse forcing necessary for
confident policymaking ulill be reliant
entirely on climate models having
little credible empirical confirmation.”
Dr Stephen E Schwartz, Atmospheric Chemist
Brookhaven Institute, and Dr Meinrat 0 Andrene,
Biogeochemist, Max Planck Institute, Science, Vol
272 May 24 1996

“Wefigure half the climate change
from 1850 to now can be accounted
for by the sun.”
Dr. Judith Lean, Solar Physicist, Naval
Research Laboratory, The New York Times,
September 23, 1997

“The temperatures we measure from
space are actually on a very slight
downward trend since I979 in the
lower troposphere. We see major
excursions due to volcanic eruptions
like Pinatubo, and ocean current
phenomena like El Nifio, but overall
the trend is about 0.05 degrees Celsius
per decade cooling.”
Dr. Roy Spencer, Meteorologist and Team Leader,
NASAiMarshall Space Flight Center,
NASAiMarshall Space Flight Center Web Site,
February 6, 1997

“There isn’t a big case being made for
the detection of greenhouse warming.”
Dr Brian Farrell, Professor of Meteorology, Harvard
University, The Washington Times, July 1, 1997

“There’salways a chance that what
we’re seeing happening is happening
for natural reasons.. . ’’
Dr. Kevin Trenberth, Climatologist, National Center
for Atmospheric Research, Associated Press,
October 6 . 1997.

“Some individuals will interpret the
recent upswing in hurricane activity
during 1995 and I996 and the
expected normal activity as evidence
of climate changes due to increased
man-made greenhouse gases.. . There
is no reasonable way such a n
interpretation can be accepted.”
Dr William Gray, Climatologist, Colorado State
University, CEl Update, Vol. 10, No. 7, June 1997.

“I believe we have a decade or so in
which we can collect data and refine
our models before we have to act.”
Dr. Gerald North, Chairman, Texas A&M
Department of Meteorology, Cincinnati Enquirer,
October 25, 1997.

“Scientistsand laypersons have a
predilection for deterministic
explanations of climate variations.
Howeveq climate can vary chaotically,
i.e., in the absence of any forcing.. .
The slightest alteration of initial or
boundary conditions changes the
developing patterns, and thus next
year’s weather is inherently
u npredicta Me.”
Dr. James Hansen, NASA Goddard Institute for
Space Studies, and 42 others, Journai of
Geophysical Research, Vol. 102, No. D22,
November 27, 1997.