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What is El Niño Taimasa?


knocker
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  • Location: Camborne
  • Location: Camborne

     

    During a very strong El Niño, sea level can drop in the tropical western South Pacific and tides remain below normal for up to a year, especially around Samoa. Scientists are studying the climate effects of this variation of El Niño, naming it 'El Niño Taimasa' after the wet stench of coral die-offs, called 'taimasa' by Samoans.

     

    http://www.sciencedaily.com/releases/2014/02/140220095033.htm

     

    AMS

     

     

    During strong El Niño events, sea level drops around some tropical western Pacific islands by up to 20–30 cm. Such events (referred to as taimasa in Samoa) expose shallow reefs, thereby causing severe damage to associated coral ecosystems and contributing to the formation of microatolls. During the termination of strong El Niño events, a southward movement of weak trade winds and the development of an anomalous anticyclone in the Philippine Sea are shown to force an interhemispheric sea level seesaw in the tropical Pacific that enhances and prolongs extreme low sea levels in the southwestern Pacific. Spectral features, in addition to wind-forced linear shallow water ocean model experiments, identify a nonlinear interaction between El Niño and the annual cycle as the main cause of these sea level anomalies.

     

    http://journals.ametsoc.org/doi/abs/10.1175/JCLI-D-13-00276.1

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