Cause and Effect of El Niño and La Niña Episodes Part 1

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This is the first part of the article. Other parts: Part 2 & Part 3

ENSO Explanation written May 2020

The US Government’s National Atmospheric and Oceanic Administration (NOAA) issues El Nino/Southern Oscillation (ENSO) report the second Thursday of every month. ENSO is a recurring climate pattern involving changes in the temperature of equatorial waters in the central and eastern Pacific Ocean. This oscillating warming and cooling pattern, referred to as the ENSO cycle, directly affects rainfall distribution around the world. El Niño and La Niña are the extreme phases of the ENSO cycle; between these two phases is a third phase called ENSO-neutral.

ENSO affects Australian weather more so than any other crop area of the world and the Aussie government devotes much of its resources to track and report ENSO information twice a month.

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