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Article

Estimation of the Latent Heat Flux over Irrigated Short Fescue Grass for Different Fetches

1
Department Medi Ambient i Cienciès del Sòl, University of Lleida, E.T.S.E.A, Rovira Roure 191, 25198 Lleida, Spain
2
Instituto de Investigación y Formación Agraria y Pesquera, Área de Agricultura y Medio Ambiente, Centro Alameda del Obispo, Avda. Menéndez Pidal s/n, 14004 Córdoba, Spain
*
Author to whom correspondence should be addressed.
Academic Editor: Daniela Vanella
Atmosphere 2021, 12(3), 322; https://doi.org/10.3390/atmos12030322
Received: 29 December 2020 / Revised: 21 February 2021 / Accepted: 23 February 2021 / Published: 1 March 2021
(This article belongs to the Special Issue Agricultural Microclimate and Irrigation Water Management)
Often in agrometeorology the instrumentation required to estimate turbulent surface fluxes must be installed at sites where fetch is not sufficient for a sector of wind directions. For different integrated flux-footprints (IFFP) thresholds and taking as a reference the half-hourly latent heat fluxes (LE) measured with a large weighing lysimeter (LELys), the eddy covariance (EC) method and two methods based on surface renewal (SR) analysis to estimate LE were tested over short fescue grass. One method combined SR with the flux-gradient (profile) relationship, SR-P method, and the other with the dissipation method, SR-D method. When LE was estimated using traces of air moisture, good performances were obtained using the EC and the SR-P methods for samples with IFFP higher than 85%. However, the closest LE estimates were obtained using the residual method. For IFFP higher than 50%, the residual method combined with the sensible heat flux estimates determined using the SR-P method performed close to LELys and using the SR-D method good estimates were obtained for accumulated LELys. To estimate the sensible heat flux, the SR-D method can be recommended for day-to-day use by farmers because it is friendly and affordable. View Full-Text
Keywords: evapotranspiration; surface energy balance; weighing lysimeter; eddy covariance; surface renewal analysis evapotranspiration; surface energy balance; weighing lysimeter; eddy covariance; surface renewal analysis
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MDPI and ACS Style

Castellví, F.; Gavilán, P. Estimation of the Latent Heat Flux over Irrigated Short Fescue Grass for Different Fetches. Atmosphere 2021, 12, 322. https://doi.org/10.3390/atmos12030322

AMA Style

Castellví F, Gavilán P. Estimation of the Latent Heat Flux over Irrigated Short Fescue Grass for Different Fetches. Atmosphere. 2021; 12(3):322. https://doi.org/10.3390/atmos12030322

Chicago/Turabian Style

Castellví, Francesc, and Pedro Gavilán. 2021. "Estimation of the Latent Heat Flux over Irrigated Short Fescue Grass for Different Fetches" Atmosphere 12, no. 3: 322. https://doi.org/10.3390/atmos12030322

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