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September 1, 2007 — Geographers have projected temperature increases due to greenhouse gas emissions to reach a not-so-chilling conclusion: climate zones will shift and some climates will disappear completely by 2100. Tropical highlands and polar regions may be the first to disappear, and large swaths of the tropics and subtropics will reach even hotter temperatures. The study anticipates large climate changes worldwide. The eastern United States has a mild, humid, temperate climate, while the western United States has a dry climate, right?
The phenomenon of wind-driven upwelling occurs when high coastal winds blow over the ocean surface, pushing warm surface waters offshore and allowing cooler, more nutrient rich water from below to rise up to the surface. This process creates a signature in sea surface temperature (SST) data where cooler water can be seen surrounded by warmer water. Such upwelling zones are visible in this SST data acquired by the NOAA GOES and POES satellites on March 9, 2011. Notice the areas of cooler water off the west coast of Central America, where wind blowing through mountain valleys creates upwelling. Also, the west coast of South America shows much cooler water.