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Climate
is the average pattern of weather over the long term.
The earth’s climate has warmed and cooled for millions
of years, since long before we appeared on the scene. There’s
no doubt that the climate is growing warmer currently; indications
of that change are all around us.
Though climate change isn’t new, the study of how human
activity affects the earth’s climate is. The exploration
of climate change encompasses many fields, including physics,
chemistry, biology, geology, meteorology, oceanography, and
even sociology.
At this Web site, you can explore scientific data relating to
the atmosphere, the oceans, the areas covered by ice and snow,
and the living organisms in all these domains. You’ll also
get a sense of how scientists study natural phenomena—how
researchers gather evidence, test theories, and come to conclusions.
Overview
of Climate Change Research 
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