Seafloor Volcano Pulses May Alter Climate
Monday, February 9, 2015 - 22:30
in Earth & Climate
Vast ranges of volcanoes hidden under the oceans are presumed by scientists to be the gentle giants of the planet, oozing lava at slow, steady rates along mid-ocean ridges. But a new study shows that they flare up on strikingly regular cycles, ranging from two weeks to 100,000 years--and, that they erupt almost exclusively during the first six months of each year. The pulses--apparently tied to short- and long-term changes in earth's orbit, and to sea levels--may help trigger natural climate swings. Scientists have already speculated that volcanic cycles on land emitting large amounts of carbon dioxide might influence climate; but up to now there was no evidence from submarine volcanoes. read more