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Título : | Atmosphere-surface fluxes modeling for the high Andes: the case of páramo catchments of Ecuador |
Autor: | Carrillo Rojas, Galo Jose Schulz, Hans Martin Orellana Alvear, Johanna Marlene Ochoa Sanchez, Ana Elizabeth Trachte, Katja Celleri Alvear, Rolando Enrique Bendix, Jorg |
Correspondencia: | Carrillo Rojas, Galo Jose, galo.carrillo@ucuenca.edu.ec |
Palabras clave : | CLM Eddy covariance Evapotranspiration METRIC Páramo Tropical Andes CLM Eddy covariance Evapotranspiration METRIC Páramo Tropical Andes |
Área de conocimiento FRASCATI amplio: | 1. Ciencias Naturales y Exactas |
Área de conocimiento FRASCATI detallado: | 1.5.10 Recursos Hídricos |
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: | 31-dic-2050 |
Volumen: | Volumen 704 |
Fuente: | Science of the Total Environment |
metadata.dc.identifier.doi: | 10.1016/j.scitotenv.2019.135372 |
Tipo: | ARTÍCULO |
Abstract: | © 2019 Elsevier B.V. Interest in atmosphere-surface flux modeling over the mountainous regions of the globe has increased recently, with a major focus on the prediction of water, carbon and other functional indicators in natural and disturbed conditions. However, less research has been centered on exploring energy fluxes (net radiation; sensible, latent and soil heat) and actual evapotranspiration (ETa) over the Neotropical Andean biome of the páramo. The present study assesses the implementation and parameterization of a state-of-art Land-Surface Model (LSM) for simulation of these fluxes over two representative páramo catchments of southern Ecuador. We evaluated the outputs of the LSM Community Land Model (CLM ver. 4.0) with (i) ground-level flux observations from the first (and highest) Eddy Covariance (EC) tower of the Northern Andean páramos; (ii) spatial ETa estimates from the energy balance-based model METRIC (based on Landsat imagery); and (iii) derived ETa from the closure of the water balance (WB). CLM's energy predictions revealed a significant underestimation on net radiation, which impacts the sensible and soil heat fluxes (underestimation), and delivers a slight overestimation on latent heat flux. Modeled CLM ETa showed acceptable goodness-of-fit (Pearson R = 0.82) comparable to ETa from METRIC (R = 0.83). Contrarily, a poor performance of ETa WB was observed (R = 0.46). These findings provide solid evidence on the CLM's accuracy for the ETa modeling, and give insights in the selection of other ETa methods. The study contributes to a better understanding of ecosystem functioning in terms of water loss through evaporative processes, and might help in the development of future LSMs’ implementations focused on climate / land use change scenarios for the páramo. |
Resumen : | Interest in atmosphere-surface flux modeling over the mountainous regions of the globe has increased recently, with a major focus on the prediction of water, carbon and other functional indicators in natural and disturbed conditions. However, less research has been centered on exploring energy fluxes (net radiation; sensible, latent and soil heat) and actual evapotranspiration (ETa) over the Neotropical Andean biome of the páramo. The present study assesses the implementation and parameterization of a state-of-art Land-Surface Model (LSM) for simulation of these fluxes over two representative páramo catchments of southern Ecuador. We evaluated the outputs of the LSM Community Land Model (CLM ver. 4.0) with (i) ground-level flux observations from the first (and highest) Eddy Covariance (EC) tower of the Northern Andean páramos; (ii) spatial ETa estimates from the energy balance-based model METRIC (based on Landsat imagery); and (iii) derived ETa from the closure of the water balance (WB). CLM's energy predictions revealed a significant underestimation on net radiation, which impacts the sensible and soil heat fluxes (underestimation), and delivers a slight overestimation on latent heat flux. Modeled CLM ETa showed acceptable goodness-of-fit (Pearson R = 0.82) comparable to ETa from METRIC (R = 0.83). Contrarily, a poor performance of ETa WB was observed (R = 0.46). These findings provide solid evidence on the CLM's accuracy for the ETa modeling, and give insights in the selection of other ETa methods. The study contributes to a better understanding of ecosystem functioning in terms of water loss through evaporative processes, and might help in the development of future LSMs’ implementations focused on climate / land use change scenarios for the páramo. |
URI : | https://www.scopus.com/record/display.uri?eid=2-s2.0-85076592770&origin=resultslist&sort=cp-f&src=s&st1=Atmosphere-surface+fluxes+modeling+for+the+high+Andes%3a+The+case+of+p%c3%a1ramo+catchments+of+Ecuador&sid=3a11b452efdd2a831e63091b72e9ed91&sot=b&sdt=b&sl=110&s=TITLE-ABS-KEY%28Atmosphere-surface+fluxes+modeling+for+the+high+Andes%3a+The+case+of+p%c3%a1ramo+catchments+of+Ecuador%29&relpos=0&citeCnt=2&searchTerm= |
URI Fuente: | https://www.sciencedirect.com/journal/science-of-the-total-environment/vol/704/suppl/C |
ISSN : | 0048-9697 |
Aparece en las colecciones: | Artículos
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