Ocean bacteria may have shut off ancient global warming
Mineral spikes in sea-floor sediments coincide with halt in temperature rise
By Gabriel Popkin, 13:45 PM April 14, 2014
Ocean-dwelling bacteria may have vacuumed up carbon and halted a period of extreme warmth some 56 million years ago, according to a study published April 13 in Nature Geoscience.
The finding suggests how Earth might once have rapidly reversed a runaway greenhouse effect. However, rapidity is relative: The bacteria would be far too slow to head off today’s human-caused climate impacts.
Scientists seeking to understand the present-day climate often study the Paleocene-Eocene Thermal Maximum, a ho...
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