February 28, 2007
GCRIO Program Overview
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Global Climate Change Digest
A Guide to Information on Greenhouse Gases and Ozone Depletion
Published July 1988 through June 1999
FROM VOLUME 7, NUMBER 6, JUNE 1994
of Carbon Dioxide Slows Down," N. Parks, Earth,
20-22, May 1994.
Data from Hawaii's Mauna Loa Observatory indicate that CO2
levels began to stabilize in mid-1991 although emissions
continued to increase. Speculates about the sink for
That Carry a Global Warning," S. Young, New Scientist,
32-35, Apr. 30, 1994.
Insects used as sensitive indicators of global warming show
that signs of warming are already evident on the Arctic island of
Spitsbergen. Whether this reflects long-term climate change or a
broad natural cycle is not clear.
for a Past Climate," H. Beltrami, D. Chapman, ibid.,
36-40, Apr. 23, 1994.
Explains how boreholes provide an historical temperature
record. Data suggest that at least part of the past century's
warming can be explained by natural fluctuations in the Earth's
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