Global Warming

This graph from the recent issue of Science Magazine shows 1.6 million years of alternating warm and cold periods in the recent geologic past. For me the importance of this data, which was generated from ocean sediment cores, is the time frames involved, and the number of glacial and interglacial periods. Also the fact that, though man was on earth during this interval, the Earth manged to get cold and warm in alternating cycles all by itself. Some scientists and many media personalities now think we can fully understand the global processes involved in these cycles of climate sufficient to predict, and reverse engineer the next warm period. This highlights for me the conceit and folly of man.


GRAPHIC: L. LISIECKI, M. RAYMO, PALEOCEANOGRAPHY AND PALEOCLIMATOLOGY20, (2005), ADAPTED BY J. YOU/SCIENCE