• Entry
  • Reader's guide
  • Entries A-Z
  • Subject index

Thornthwaite, C. Warren (1899–1963)

  • By: Anthony J. Braze
  • In: Encyclopedia of Geography
  • Edited by: Barney Warf
  • Subject:General Geography, Earth & Environmental Science

Charles Warren Thornthwaite was one of the most influential climatologists of the 20th century. His work on the water balance concept remains a legacy today in environmental and scientific disciplines. Scientists used his water balance methods to depict regional climates and to solve environmental and geographical problems specifically related to agriculture and water balance. Thornthwaite realized that a more logical approach to the moisture factor in climate was needed. As a result, he developed the concept of potential evapotranspiration (PE)—evaporation and transpiration from a uniformly covered ground surface of vegetation that would be adequately supplied with water. Empirical relationships were developed to determine PE based on simple measures of air temperature and a latitude factor to adjust for day length and variables either measured ...

    • Loading...
    locked icon

    Sign in to access this content

    Get a 30 day FREE TRIAL

    • Watch videos from a variety of sources bringing classroom topics to life
    • Read modern, diverse business cases
    • Explore hundreds of books and reference titles