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precipitation-efficiency index

precipitation-efficiency index

A Dictionary of Ecology | 2004 | | Copyright

precipitation-efficiency index Devised in 1931 by C. W. Thornthwaite, an index based on the ratio of mean monthly rainfall and temperature values in relation to evaporation rates. Summation of monthly values gives an annual precipitation-efficiency index (P–E), which is used to define major climatic regions. See also Thornthwaite climate classification.
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MICHAEL ALLABY. "precipitation-efficiency index." A Dictionary of Ecology. 2004. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "precipitation-efficiency index." A Dictionary of Ecology. 2004. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1O14-precipitationefficincyndx.html

MICHAEL ALLABY. "precipitation-efficiency index." A Dictionary of Ecology. 2004. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O14-precipitationefficincyndx.html

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precipitation-efficiency index

A Dictionary of Earth Sciences | 1999 | | Copyright

precipitation-efficiency index Devised in 1931 by C. W. Thornthwaite, an index based on the ratio of mean monthly rainfall and temperature values to evaporation rates. Summation of monthly values gives an annual precipitation-efficiency index (P-E), which is used to define major climatic regions. See also THORNTHWAITE CLIMATE CLASSIFICATION.
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AILSA ALLABY and MICHAEL ALLABY. "precipitation-efficiency index." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>.

AILSA ALLABY and MICHAEL ALLABY. "precipitation-efficiency index." A Dictionary of Earth Sciences. 1999. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1O13-precipitationefficincyndx.html

AILSA ALLABY and MICHAEL ALLABY. "precipitation-efficiency index." A Dictionary of Earth Sciences. 1999. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O13-precipitationefficincyndx.html

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precipitation-efficiency index

A Dictionary of Plant Sciences | 1998 | | Copyright

precipitation-efficiency index Devised in 1931 by C. W. Thornthwaite, an index based on the ratio of mean monthly rainfall and temperature values to evaporation rates. Summation of monthly values gives an annual precipitation-efficiency index (P–E), which is used to define major climatic regions.
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MICHAEL ALLABY. "precipitation-efficiency index." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. 31 May. 2012 <http://www.encyclopedia.com>.

MICHAEL ALLABY. "precipitation-efficiency index." A Dictionary of Plant Sciences. 1998. Encyclopedia.com. (May 31, 2012). http://www.encyclopedia.com/doc/1O7-precipitationefficincyndx.html

MICHAEL ALLABY. "precipitation-efficiency index." A Dictionary of Plant Sciences. 1998. Retrieved May 31, 2012 from Encyclopedia.com: http://www.encyclopedia.com/doc/1O7-precipitationefficincyndx.html

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