Caption: Animated map of precipitable water in the atmosphere during an El Nino-La Nina event. The events are characterised by variations in the sea surface temperature in the equatorial Pacific Ocean. High temperatures are associated with low overlying atmospheric pressure, and an increase in precipitable water. At the start of the animation, during La Nina (1917) conditions, the west coast of northern South America is cool, with high pressure and low precipitable water, with most atmospheric water over the western Pacific. As the conditions change to El Nino (1919), the sea surface off the coast of South America warms markedly, with associated low pressure and high precipitable water. The central Pacific region then contains much more precipitable water (red) also. The El Nino Southern Oscillation affects the weather around the world.

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Keywords: 1917, 1918, 20th century, animated, animation, atmosphere, atmospheric, climate, dataset, earth, earth observation, el nino, el nino southern oscillation, enso, flat projection, global, la nina, land, meteorological, meteorology, ocean, pacific ocean, precipitable water, precipitation, sea, sea surface, temperature, tropical, water, weather, world

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El Nino and La Nina events

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Duration: 00:02:26

Frame size: 1920x1080

Frame rate: 25

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Codec: Photo - JPEG

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