what does weak trade winds mean
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The trade winds are the prevailing pattern of easterly surface windsfound in the tropics, within the lower portion of the Earth's atmosphere, in the lower section of the troposphere near the Earth's equator. ... The weakerthe trade winds become, the more rainfall can be expected in the neighboring landmasses
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The air-sea interaction that occur during an El- Nino event feed off each other. As the pressure falls in the east and rises in the west, the surface pressure gradient is readuced and the trade winds weaken. This allows more warm surface water to flow eastward, which brings with it more rain, which leads to a further decrease of pressure in the east because the latent heat of condensation warms the air... and the cycle continues.
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