Skip to main content
Select Source:

precipitation-efficiency index

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.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"precipitation-efficiency index." A Dictionary of Ecology. . Encyclopedia.com. 23 Jul. 2017 <http://www.encyclopedia.com>.

"precipitation-efficiency index." A Dictionary of Ecology. . Encyclopedia.com. (July 23, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/precipitation-efficiency-index-0

"precipitation-efficiency index." A Dictionary of Ecology. . Retrieved July 23, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/precipitation-efficiency-index-0

precipitation-efficiency index

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.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"precipitation-efficiency index." A Dictionary of Earth Sciences. . Encyclopedia.com. 23 Jul. 2017 <http://www.encyclopedia.com>.

"precipitation-efficiency index." A Dictionary of Earth Sciences. . Encyclopedia.com. (July 23, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/precipitation-efficiency-index

"precipitation-efficiency index." A Dictionary of Earth Sciences. . Retrieved July 23, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/precipitation-efficiency-index

precipitation-efficiency index

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.

Cite this article
Pick a style below, and copy the text for your bibliography.

  • MLA
  • Chicago
  • APA

"precipitation-efficiency index." A Dictionary of Plant Sciences. . Encyclopedia.com. 23 Jul. 2017 <http://www.encyclopedia.com>.

"precipitation-efficiency index." A Dictionary of Plant Sciences. . Encyclopedia.com. (July 23, 2017). http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/precipitation-efficiency-index-1

"precipitation-efficiency index." A Dictionary of Plant Sciences. . Retrieved July 23, 2017 from Encyclopedia.com: http://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/precipitation-efficiency-index-1