OpenET Brazil: preliminary results of a multi-model approach to actual evapotranspiration monitoring at multiple scales

Código

XXV-SBRH1201

Autores

Bruno César Comini de Andrade, LEONARDO LAIPELT DOS SANTOS, Martha Anderson, Charles Morton, Justin Huntington, Forrest Melton, Tyler Erickson, DEBORA REGINA ROBERTI, Vanessa de Arruda Souza, Marcelo Sacardi Biudes, Nadja Gomes Machado, Carlos Antonio Costa dos Santos, ANDERSON LUIS RUHOFF, Christopher Hain

Tema

STE26 - Sensoriamento remoto da água: avanços técnicos-científicos e aplicações na nova era de disponibilidade de informação

Resumo

Evapotranspiration (ET) monitoring plays a crucial role in understanding the water cycle and its implications for agriculture, hydrology, and climate modeling. ET has been historically measured from remote sensing data based on surface energy balance models. However, the variability of ET models poses challenges for accurate estimations worldwide. Recognizing this, the OpenET initiative adopted an ensemble approach, combining multiple models to enhance accuracy and reliability. While this approach has been extensively evaluated in the United States (US), the need for accurate ET data extends to Brazil and other regions. Replicating the methodology in Brazil would provide the same benefits seen in the US, while also allowing for adaptation and identification of regional differences, promoting robust and generalizable estimations in the Brazilian context, and towards global application. Preliminary results from the ensemble approach in Brazil show promise, with reduced uncertainties and enhanced accuracy compared to individual models. The next steps of this research will involve the expansion of both the models? catalog and the ground-truth data, as well as the development of user-friendly tools and platforms, promoting widespread adoption and accessibility, collaboration, and data sharing. Ultimately, we aim to facilitate informed decision-making and sustainable water resource management in Brazil, paving the way for a comprehensive understanding of ET dynamics and their implications.