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ARS Home » Plains Area » Fort Collins, Colorado » Center for Agricultural Resources Research » Water Management and Systems Research » Research » Publications at this Location » Publication #371782

Research Project: Improving the Sustainability of Irrigated Farming Systems in Semi-Arid Regions

Location: Water Management and Systems Research

Title: The apples and oranges of reference and potential evapotranspiration: Implications for agroecosystem models

Author
item DeJonge, Kendall
item Thorp, Kelly
item Marek, Gary

Submitted to: Agricultural & Environmental Letters
Publication Type: Peer Reviewed Journal
Publication Acceptance Date: 3/7/2020
Publication Date: 4/16/2020
Citation: DeJonge, K.C., Thorp, K.R., Marek, G.W. 2020. The apples and oranges of reference and potential evapotranspiration: Implications for agroecosystem models. Agricultural and Environmental Letters. 5(1). https://doi.org/10.1002/ael2.20011.
DOI: https://doi.org/10.1002/ael2.20011

Interpretive Summary: The purpose of this article was to demonstrate the need for use of common evapotranspiration (ET) vocabulary and understanding of standardized ET methods within the agroecosystem modeling community. We discuss the important difference between reference ET and potential ET, give examples of how these concepts have been misapplied in cropping systems models, give examples of communication barriers between ET practitioners and modelers, and give suggestions for priorities moving forward.

Technical Abstract: Although standardized evapotranspiration (ET) methods have been available for decades, they are commonly misunderstood, miscommunicated, and misused, especially within the agroecosystem modeling community. Some models misapply or misname standardized ET methods unbeknownst to users, and there is confusion in communication between ET practitioners and modelers. By highlighting some of these issues, we demonstrate and suggest the need for improved and consistent communication and application of standardized ET methodology.