Giulia Cigna
Evapotranspiration shed of key agricultural crops: combining agro-hydrological estimates with atmospheric moisture dynamics.
Rel. Marta Tuninetti, Elena De Petrillo, Lan Wang-Erlandsson. Politecnico di Torino, Corso di laurea magistrale in Ingegneria Per L'Ambiente E Il Territorio, 2025
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Abstract
The increasing global demand for food, feed and flexible crops is exerting unprecedented pressure on the global hydrological cycle through landscape conversion and increasing irrigation demand, which altogether contribute to the alteration of land-atmosphere feedbacks. These feedbacks influence evaporation and precipitation patters through atmospheric flows. Atmospheric moisture flows connect sources of evaporation to sinks of precipitation, from local to regional and continental scale, up to thousands of kilometres away. Terrestrial sources of evaporation are crucial for global food production, regulating precipitation and climate patterns by redistributing water and latent heat. At the same time, the alteration of evapotranspiration dynamics from these sources is mainly driven by land-use conversion for pasture (cattle meat production), and feed crops (such as soy, and maize) and agricultural practises, such as irrigation.
Current water use assessment disregard these feedbacks and the role played by atmospheric moisture connection in redistributing evaporation from agricultural parcels to precipitation in downwind areas
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