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The 2014/15 El Niño – Part 21 – December Update – Weekly NINO3.4 SSTa at Threshold of Moderate El Niño

Guest Post by Bob Tisdale This post provides an update on the progress of the evolution of the 2014/15 El Niño conditions. The post is similar in layout to the earlier updates. (See the entire 2014/15 El Niño series of posts here.) The post includes 3 gif animations and more than a dozen illustrations so…

BOM ENSO Tracker

Quicky Mid-November 2014 ENSO Update

Guest Post by Bob Tisdale AUSTRALIA’S BOM UPGRADES ENSO TRACKER STATUS TO EL NIÑO ALERT On November 18, Australia’s Bureau of Meteorology (BOM) upgraded the conditions in the tropical Pacific from El Niño “watch” to “alert” levels, “indicating at least a 70% chance of El Niño occurring”.  See the rest of their update here. NOAA’S WEEKLY…

Pools of warm water known as Kelvin waves can be seen traveling eastward along the equator (black line) in this Sept. 17, 2009, image from the NASA/French Space Agency Ocean Surface Topography Mission/Jason-2 satellite. El Ninos form when trade winds in the equatorial western Pacific relax over a period of months, sending Kelvin waves eastward across the Pacific like a conveyor belt. Image credit: NASA/JPL Ocean Surface Topography Team

El Niño fades without westerly wind bursts

From AGU: The warm and wet winter of 1997 brought California floods, Florida tornadoes, and an ice storm in the American northeast, prompting climatologists to dub it the El Niño of the century. Earlier this year, climate scientists thought the coming winter might bring similar extremes, as equatorial Pacific Ocean conditions resembled those seen in…