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Lecture 12 - Lecture 12 Regional Weather Patterns Monsoons...

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Lecture 12: Regional Weather Patterns - Monsoons High and low pressure centers develop seasonally and produce special climate patterns termed monsoons
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Definition of Monsoon Monsoon circulation identifies a SEASONAL pattern in which winds, on a large regional scale, blow persistently either from land to the oceans or from the oceans to land. Winds blowing toward the oceans tend to be cold and dry. Winds blowing from the oceans to land tend to be warm and moist with LOTS of rain. Centers of pressure do not move.
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Causes of Monsoons The most important factor to cause monsoons is that land changes its surface temperature much faster than water as a result of seasonal changes in solar insolation. This is because water has a significantly higher heat capacity than land/rock/vegetation. Another factor is that, because water is a fluid, it mixes within the upper ~100 meters or so of the water column. This means heat gains or losses have to reach a much larger volume of water than just the surface. By contrast, land as a solid really
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