Penman equation

proper noun

An equation that describes evaporation from an open water surface, based on the daily mean temperature, wind speed, air pressure, and solar radiation.

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Meanings

proper nounthe Penman equation
  1. An equation that describes evaporation from an open water surface, based on the daily mean temperature, wind speed, air pressure, and solar radiation.

Origin

Developed by Howard Penman in 1948.

Full word history & related roots →
Cite this entry
APA

Penman equation. (n.d.). In WatkinsX Dictionary. Retrieved November 4, 2026, from https://dictionary.watkinsx.com/word/Penman%20equation

MLA

“Penman equation.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/Penman%20equation. Accessed November 4, 2026.

Chicago

WatkinsX Dictionary, s.v. “Penman equation,” accessed November 4, 2026, https://dictionary.watkinsx.com/word/Penman%20equation.

Source: Penman equation on Wiktionary, CC BY-SA 4.0.