Estimating the evaporative cooling effect of irrigation within and above soybean canopy

0555128 - ÚVGZ 2023 RIV CH eng J - Článek v odborném periodiku
Ghafarian, F. - Wieland, R. - Nendel, Claas
Estimating the evaporative cooling effect of irrigation within and above soybean canopy.
Water. Roč. 14, č. 3 (2022), č. článku 319. E-ISSN 2073-4441
Institucionální podpora: RVO:86652079
Klíčová slova: climate-change * temperature * impact * canopy cooling effects * shading cooling * canopy-air temperature * energy balance * the Penman-Monteith equation
Obor OECD: Climatic research
Impakt faktor: 3.4, rok: 2022
Způsob publikování: Open access
https://www.mdpi.com/2073-4441/14/3/319

Vegetation with an adequate supply of water might contribute to cooling the land surface around it through the latent heat flux of transpiration. This study investigates the potential estimation of evaporative cooling at plot scale, using soybean as example. Some of the plants' physiological parameters were monitored and sampled at weekly intervals. A physics-based model was then applied to estimate the irrigation-induced cooling effect within and above the canopy during the middle and late season of the soybean growth period. We then examined the results of the temperature changes at a temporal resolution of ten minutes between every two irrigation rounds. During the middle and late season of growth, the cooling effects caused by evapotranspiration within and above the canopy were, on average, 4.4 K and 2.9 K, respectively. We used quality indicators such as R-squared (R-2) and mean absolute error (MAE) to evaluate the performance of the model simulation. The performance of the model in this study was better above the canopy (R-2 = 0.98, MAE = 0.3 K) than below (R-2 = 0.87, MAE = 0.9 K) due to the predefined thermodynamic condition used to estimate evaporative cooling. Moreover, the study revealed that canopy cooling contributes to mitigating heat stress conditions during the middle and late seasons of crop growth.
Trvalý link: http://hdl.handle.net/11104/0330448