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LibGuide Assignment - Julie Weber   Tags: web2.0  

A short LibGuide created by Julie Weber for the Web2.0 Challenge.
Last Updated: Aug 28, 2009 URL: Print Guide RSS Updates
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Weather Links

Links to weather forcasting sites.


What is Weather

Weather is a set of all the phenomena occurring in a given atmosphere at a given time.[1] Weather phenomena lie in the troposphere.[2][3] Weather refers, generally, to day-to-day temperature and precipitation activity, whereas climate is the term for the average atmospheric conditions over longer periods of time.[4] When used without qualification, "weather" is understood to be the weather of Earth.

Weather occurs due to density (temperature and moisture) differences between one place and another. These differences can occur due to the sun angle at any particular spot, which varies by latitude from the tropics. The strong temperature contrast between polar and tropical air gives rise to the jet stream. Weather systems in the mid-latitudes, such as extratropical cyclones, are caused by instabilities of the jet stream flow. Because the Earth's axis is tilted relative to its orbital plane, sunlight is incident at different angles at different times of the year. On Earth's surface, temperatures usually range ±40 °C (100 °F to −40 °F) annually. Over thousands of years, changes in Earth's orbit affect the amount and distribution of solar energy received by the Earth and influence long-term climate

Source: Wikipedia (


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Julie Weber
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