Publisher's Synopsis
Excerpt from International Decade of Ocean Exploration, Progress Report, April 1976 to April 1977, Vol. 6
On a much longer-term basis, scientists in the Climate, Long-range Investigation, Mapping, and Prediction (olimar) program have used fossils captured in deep-sea sediment cores to describe the main features of the global environment years ago. Drawing on this data, they found that changes in the distribution of solar radiation caused by changes in the path of the Earth's orbit, its tilt, and wobble are the fundamental causes of the waxing and waning of ice ages during the last years. Although these changes are relatively small, they produce major climatic changes. Ignoring the possible effect of man-made influences, the data indicate a coming, extensive glaciation period for the Northern Hemisphere over the next few thousand years.
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