Climate Changes on Rapa Nui

Effects on animal life in the Eastern Pacific Ocean:

El aumento de las lluvias relacionado con El Niño aumenta la turbidez del agua y disminuye su salinidad, influyendo en los procesos de fotosintesis submarina. Ello afecta la relacion natural entre los peces y su medio ambiente, disminuyendo sus poblaciones normales.

Se fue “La Niña” Is Gone

In the last half of 2010 and the summer of this year, there have been droughts in continental Chile as well as on Easter Island.  This is due to the oceanic phenomenon known as “La Niña”, which, this time, has been the largest and longest since 1975, before diminishing slowly into the second semester of the year.  Corvette Captain Alejandro de la Maza of the Meteorological Service of the Chilean Navy explains that “every 2 to 7 years in the tropical Pacific region, we have the phenomena of “El Niño” (unusual warming of the tropical waters of the Pacific Ocean) and “La Niña” (unusual cooling of the same), the consequences of which extend to Asia, Oceania and America.  These phenomena are also known as ENSO (El Niño Southern Oscillation) due to the interaction between the ocean and the atmosphere.  Any change in the wind will produce a corresponding change in the atmospheric pressure.  The Southern Oscillation gets its name from the differences in atmospheric pressure that occur between Tahiti and Australia and which last from 6 months up to 2 years and can affect the rainfall, the air temperatures, the nutrients in the water and the variety of marine life which can be found in the area.  Some studies indicate that there really is no “normal” condition because it is always in transition from one state to another”.
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During “El Niño”, surface waters which are normally poor in nutrients are separated from the colder, richer waters found in the deep sea and only warmer, less nutritious water is brought to the surface.  During a “La Niña” period, the South Pacific anticyclone, which is located between the Juan Fernández Islands and Easter Island rotating in the opposite direction of the earth’s rotation, strengthens the winds and currents in their normal direction.  Cooler water evaporates less, producing fewer clouds and, therefore, less rain.  Both these phenomena are related to climatic upsets in many parts of the world, as well as alterations in ecosystems on both land and sea.
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Bees Rapa Nui

Bees Rapa Nui

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