Thursday, July 28, 2005
Earlier this month, I posted a link to the Wara study (published on line before its publication today in Science). The study suggests "permanent" el nino warm ocean currents governed a past era,which had global temperatures in the range we expect during the next century.
Ralph Kerr's note (published in Science today) explains the significance of the Wara study and a previous British study that indicated a permanent la nina cold ocean current governed that geological period.
Fluctuation between el nino and la nina ocean currents drives the global climate regime. So, it is important whether global warming will lead to el nino warm ocean currents or la nina cold ocean currents. The effects of global warming on regional climates greatly depend on whether global warming will be accompanied by el nino, la nina, or fluctuations between the two.