Patterns and drivers of evapotranspiration in South American wetlands

Ayan Santos Fleischmann, Leonardo Laipelt, Fabrice Papa, Rodrigo Cauduro Dias de Paiva, Bruno Comini de Andrade, Walter Collischonn, Marcelo Sacardi Biudes, Rafael Kayser, Catherine Prigent, Eric Cosio, Nadja Gomes Machado, Anderson Ruhoff

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Resumen

Evapotranspiration (ET) is a key process linking surface and atmospheric energy budgets, yet its drivers and patterns across wetlandscapes are poorly understood worldwide. Here we assess the ET dynamics in 12 wetland complexes across South America, revealing major differences under temperate, tropical, and equatorial climates. While net radiation is a dominant driver of ET seasonality in most environments, flooding also contributes strongly to ET in tropical and equatorial wetlands, especially in meeting the evaporative demand. Moreover, significant water losses through wetlands and ET differences between wetlands and uplands occur in temperate, more water-limited environments and in highly flooded areas such as the Pantanal, where slow river flood propagation drives the ET dynamics. Finally, floodplain forests produce the greatest ET in all environments except the Amazon River floodplains, where upland forests sustain high rates year round. Our findings highlight the unique hydrological functioning and ecosystem services provided by wetlands on a continental scale.

Idioma originalInglés
Número de artículo6656
PublicaciónNature Communications
Volumen14
N.º1
DOI
EstadoPublicada - dic. 2023

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