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Título : | Unravelling evapotranspiration controls and components in tropical Andean tussock grasslands |
Otros títulos : | |
Autor: | Ochoa Sanchez, Ana Elizabeth Crespo Sanchez, Patricio Javier Carrillo Rojas, Galo Jose Marin Molina, Franklin Geovanny Celleri Alvear, Rolando Enrique |
Correspondencia: | Ochoa Sanchez, Ana Elizabeth, ochoa.anaelizabeth@gmail.com |
Palabras clave : | Andes Mountain Net radiation Páramo Transpiration Tropics |
Área de conocimiento FRASCATI amplio: | 1. Ciencias Naturales y Exactas |
Área de conocimiento FRASCATI detallado: | 1.5.8 Ciencias del Medioambiente |
Área de conocimiento FRASCATI específico: | 1.5 Ciencias de la Tierra y el Ambiente |
Área de conocimiento UNESCO amplio: | 05 - Ciencias Físicas, Ciencias Naturales, Matemáticas y Estadísticas |
ÁArea de conocimiento UNESCO detallado: | 0521 - Ciencias Ambientales |
Área de conocimiento UNESCO específico: | 052 - Medio Ambiente |
Fecha de publicación : | 2020 |
Fecha de fin de embargo: | 10-jun-2050 |
Volumen: | Volumen 34, Número 9 |
Fuente: | Hydrological Processes |
metadata.dc.identifier.doi: | https://doi.org/10.1002/hyp.13716 |
Tipo: | ARTÍCULO |
Abstract: | The study of the environmental factors that control evapotranspiration and the components of evapotranspiration leads to a better understanding of the actual evapotranspiration (ET) process that links the functioning of the soil, water and atmosphere. It also improves local, regional and global ET modelling. Globally, few studies so far focussed on the controls and components of ET in alpine grasslands, especially in mountainous sites such as the tussock grasslands located in the páramo biome (above 3300 m a.s.l.). The páramo occupies 35 000 km2 and provides water resources for many cities in the Andes. In this article, we unveiled the controls on ET and provided the first insights on the contribution of transpiration to ET. We found that the wet páramo is an energy-limited region and net radiation (Rn) is primarily controlling ET. ET was on average 1.7 mm/day. The monthly average evaporative fraction (ET/Rn) was 0.47 and it remained similar for wet and dry periods. The secondary controls on ET were wind speed, aerodynamic resistance and surface resistance that appeared more important for dry periods, where significantly higher ET rates were found (20% increase). During dry events, transpiration was on average 1.5 mm/day (range 0.7–2.7 mm/day), similar to other tussock grasslands in New Zealand (range 0.6–3.3 mm/day). Evidence showed interception contributes more to ET than transpiration. This study sets a precedent towards a better understanding of the evapotranspiration process and will ultimately lead to a better land-atmosphere fluxes modelling in the tropics. © 2020 John Wiley & Sons Ltd |
Resumen : | The study of the environmental factors that control evapotranspiration and the components of evapotranspiration leads to a better understanding of the actual evapotranspiration (ET) process that links the functioning of the soil, water and atmosphere. It also improves local, regional and global ET modelling. Globally, few studies so far focussed on the controls and components of ET in alpine grasslands, especially in mountainous sites such as the tussock grasslands located in the páramo biome (above 3300 m a.s.l.). The páramo occupies 35 000 km2 and provides water resources for many cities in the Andes. In this article, we unveiled the controls on ET and provided the first insights on the contribution of transpiration to ET. We found that the wet páramo is an energy-limited region and net radiation (Rn) is primarily controlling ET. ET was on average 1.7 mm/day. The monthly average evaporative fraction (ET/Rn) was 0.47 and it remained similar for wet and dry periods. The secondary controls on ET were wind speed, aerodynamic resistance and surface resistance that appeared more important for dry periods, where significantly higher ET rates were found (20% increase). During dry events, transpiration was on average 1.5 mm/day (range 0.7–2.7 mm/day), similar to other tussock grasslands in New Zealand (range 0.6–3.3 mm/day). Evidence showed interception contributes more to ET than transpiration. This study sets a precedent towards a better understanding of the evapotranspiration process and will ultimately lead to a better land-atmosphere fluxes modelling in the tropics. © 2020 John Wiley & Sons Ltd |
URI : | https://www.scopus.com/record/display.uri?eid=2-s2.0-85079716628&origin=resultslist&sort=plf-f&src=s&st1=Unravelling+evapotranspiration+controls+and+components+in+tropical+Andean+tussock+grasslands&sid=3b94e4cd260aaf8560676aff65fa2a07&sot=b&sdt=b&sl=107&s=TITLE-ABS-KEY%28Unravelling+evapotranspiration+controls+and+components+in+tropical+Andean+tussock+grasslands%29&relpos=0&citeCnt=6&searchTerm=&featureToggles=FEATURE_NEW_DOC_DETAILS_EXPORT:1 |
URI Fuente: | https://onlinelibrary.wiley.com/toc/10991085/2020/34/9 |
ISSN : | 0885-6087 |
Aparece en las colecciones: | Artículos
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