The result was to shift the intertropical convergencezone southwards.
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The debris ends up concentrated by circular, clockwise ocean currents within an oblong-shaped convergencezone.
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Dr James Renwick says small changes to the South Pacific convergencezone can also add to dramatic weather variability.
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The results show that the convergencezone is clearly visible at between 56.5 and 57 degrees south.
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These droughts resulted from something completely new to scientists: unusually warm Atlantic sea-surface temperatures, which shifted the rain-bearing inter-tropical convergencezone northward of the Amazon.
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Meteorologist Carol Maafala Baqui says a South Pacific convergencezone, which also acts as a trough, is responsible for the incessant downpours since the weekend.
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Such transformations depend largely on the migratory whims of the Inter-tropical ConvergenceZone.
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The plane flew into a notoriously stormy area that shifts around the Equator, known as the Intertropical ConvergenceZone.
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The modern state of the Atlantic meridional overturning circulation promotes a northerly maximum of tropical rainfall associated with the Intertropical ConvergenceZone (ITCZ).