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MONSOONS PHSC -210 LUO Instructor: Stephen Underwood Monsoons Michael Duchesne June 22, 2014
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MONSOONS I. Introduction What is a Monsoon; Webster’s Concise Encyclopedia defines a monsoon as “Major wind system that seasonally reverses its direction (e.g., one that blows for six months from the northeast and six months from the southwest). Seasonal changes in temperature are large over land but small over oceans. Most summer monsoons produce copious amounts of rain; winter monsoons tend to cause drought.” II. General overview Monsoons are caused by the changes in land and ocean temperatures that occur from winter and summer. During the summer land temperatures are hotter than that of the ocean. The monsoon then blows from the moist ocean the land region. Summer monsoons tend to bring in moisture causing rain and while winter monsoons bring dry air and can cause drought. There is a region around the equator of the earth known as the Monsoon zone. It consists of “a belt of low-pressure air currents that circle the Earth” (N.G. 2014) also known as the Inter- tropical Convergence zone or ITCZ. The Monsoon zone has mild winds and is warm. At sea this is referred to as “Doldrums due to lack of winds.” (N.G. 2014) This area exists because of where the north and south trade winds converge and force air up into the atmosphere forming the ITCZ. This warm moist air shifts with the seasons and the shift “into the Northern Hemisphere in May and June coincides with the onset of the summer monsoon in Southeast Asia.” (Lindsey & Kennedy, 2011) Summer Monsoons are associated with heavy rain, powerful storms and flooding. Some regions of the world dread their summer monsoon seasons as they are devastating and harsh when they occur such as in Bangladesh were deforestation of the Ganges and Brahmaputra Rivers area and the high population concentration in these areas. In arid regions such as Arizona in the United States, “the North American monsoon is also the primary water source for most desert ecosystems in the region.” (N.G. 2014) Many people look forward to the summer monsoons as they bring much needed moisture to the region. People tend
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  • Fall '10
  • JamesWilkerson
  • Monsoon, Summer Monsoon, Monsoon Asia Integrated Regional Study., Monsoon Asia Integrated

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