Christine Pulliam
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CfA Press Release Images
 Release No.: 03-10: 20th Century Climate Not So Hot
For Release: March 31, 2003

coral Caption: Coral reefs are sensitive to a variety of environmental changes. Smithsonian astronomers Willie Soon and Sallie Baliunas reviewed more than 200 studies of coral, glacier ice cores, tree rings and other indicators to trace changes in the world's climate over the past millennium. They found that the 20th century is NOT the warmest of the past 1000 years. (Credit: David A. Aguilar, Harvard-Smithsonian Center for Astrophysics)

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trees Caption: Studies of tree rings can yield yearly records of temperature and precipitation trends. Researchers drill small cores to obtain samples. (Credit: Tony C. Caprio)

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ice Caption: Glacier ice cores record temperature and precipitation trends over longer time scales of several decades to a century. (Credit: Kendrick Taylor, Desert Research Institute)

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