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Evapotranspiration Measurements and Calculations

Title data

Allen, Richard ; Foken, Thomas ; Kilic, Ayse ; Trezza, Richardo ; Ortega-Farias, Samuel:
Evapotranspiration Measurements and Calculations.
In: Foken, Thomas (ed.): Springer Handbook of Atmospheric Measurements. - Cham, Switzerland : Springer , 2021 . - pp. 1545-1581 . - (Springer Handbooks )
ISBN 978-3-030-52170-7
DOI: https://doi.org/10.1007/978-3-030-52171-4_57

Official URL: Volltext

Abstract in another language

Actual and maximum rates of evaporation (E) and evapotranspiration (ET) are important to the operation of atmospheric process models and for hydrologic and agricultural modeling. Because rates of evapotranspiration are limited by both the available energy at the surface and the availability of water, a variety of techniques can be used for estimation. The near-maximum ET under nonlimiting water availability can be closely approximated by the reference ET concept using near-surface observations of air temperature, humidity, wind speed, and solar radiation via the Penman–Monteith or a similar method. The determination of actual rates of ET when water is limiting demands a more complex approach, and often requires daily (or even more frequent) water balance data for the upper soil layers. An alternative is to measure the actual ET using micrometeorological techniques such as the eddy-covariance and Bowen ratio methods. The application of standardized calculations for the reference ET is discussed, as are iterative surface energy balance–aerodynamic combinations, which are useful in conditions where water is limiting.

Further data

Item Type: Article in a book
Refereed: Yes
Keywords: Evaporation; Evapotranspiration; Latent heat flux; Bowen-ratio method; Priestley–Taylor method; Penman–Monteith method; Reference evapotranspiration method; Crop coefficient; Class A pan
Institutions of the University: Faculties > Faculty of Biology, Chemistry and Earth Sciences > Department of Earth Sciences > Former Professors > Professor Micrometeorology - Univ.-Prof. Dr. Thomas Foken
Research Institutions > Research Centres > Bayreuth Center of Ecology and Environmental Research- BayCEER
Result of work at the UBT: No
DDC Subjects: 500 Science
500 Science > 500 Natural sciences
500 Science > 550 Earth sciences, geology
500 Science > 570 Life sciences, biology
Date Deposited: 15 Nov 2021 08:38
Last Modified: 15 Nov 2021 08:38
URI: https://eref.uni-bayreuth.de/id/eprint/67800