Retrieving "Nino 3 4 Region" from the archives

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1. El Nino Events

   Linked via "Niño 3.4 region"

   During the onset of an El Niño, the atmospheric pressure differential between the eastern and western Pacific Ocean lessens, often measured by the Southern Oscillation Index (SOI). The weakened trade winds allow the warm pool of water that normally resides near Asia to migrate eastward via Kelvin waves propagating along the equatorial thermocline.
   Mathematically, the thermal …