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El Niño in the Tropical Pacific

The tropical Pacific is in the early stages of El Niño. Based upon model outlooks and current observations, the Australian Metorological Bureau\'s ENSO Tracker was raised to El Niño status May 12, 2015.

May 14, 2015


The tropical Pacific is in the early stages of El Niño. Based upon model outlooks and current observations, the Australian Metorological Bureau\'s ENSO Tracker was raised to El Niño status May 12, 2015.

El Niño–Southern Oscillation (ENSO) indicators have shown a steady trend towards El Niño levels since the start of the year. Sea surface temperatures in the tropical Pacific Ocean have exceeded El Niño thresholds for the past month, supported by warmer-than-average waters below the surface. Trade winds have remained consistently weaker than average since the start of the year, cloudiness at the Date Line has increased and the Southern Oscillation Index (SOI) has remained negative for several months. These indicators suggest the tropical Pacific Ocean and atmosphere have started to couple and reinforce each other, indicating El Niño is likely to persist in the coming months.

International climate models surveyed by the Bureau indicate that tropical Pacific Ocean temperatures are likely to remain above El Niño thresholds through the coming southern winter and at least into spring.

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