Multi-scale temporal analysis of evaporation on a saline lake in the Atacama Desert

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dc.catalogadorgrr
dc.contributor.authorLobos Roco, Felipe Andres
dc.contributor.authorHartogensis, Oscar
dc.contributor.authorSuarez Poch, Francisco Ignacio
dc.contributor.authorHuerta-Viso, Ariadna
dc.contributor.authorBenedict, Imme
dc.contributor.authorde la Fuente, Alberto
dc.contributor.authorVila-Guerau de Arellano, Jordi
dc.contributor.otherCEDEUS (Chile)
dc.date.accessioned2024-09-12T14:04:03Z
dc.date.available2024-09-12T14:04:03Z
dc.date.issued2022
dc.description.abstractWe investigate how evaporation changes depending on the scales in the Altiplano region of the Atacama Desert. More specifically, we focus on the temporal evolution from the climatological to the sub-diurnal scales on a high-altitude saline lake ecosystem. We analyze the evaporation trends over 70 years (1950–2020) at a high-spatial resolution. The method is based on the downscaling of 30 km ERA5 reanalysis data at hourly resolution to 0.1 km spatial resolution data, using artificial neural networks to analyze the main drivers of evaporation. To this end, we use the Penman open-water evaporation equation, modified to compensate for the energy balance non-closure and the ice cover formation on the lake during the night. Our estimation of the hourly climatology of evaporation shows a consistent agreement with eddy-covariance (EC) measurements and reveals that evaporation is controlled by different drivers depending on the time scale. At the sub-diurnal scale, mechanical turbulence is the primary driver of evaporation, and at this scale, it is not radiation-limited. At the seasonal scale, more than 70 % of the evaporation variability is explained by the radiative contribution term. At the same scale, and using a large-scale moisture tracking model, we identify the main sources of moisture to the Chilean Altiplano. In all cases, our regime of precipitation is controlled by large-scale weather patterns closely linked to climatological fluctuations. Moreover, seasonal evaporation significantly influences the saline lake surface spatial changes. From an interannual scale perspective, evaporation increased by 2.1 mm yr−1 during the entire study period, according to global temperature increases. Finally, we find that yearly evaporation depends on the El Niño–Southern Oscillation (ENSO), where warm and cool ENSO phases are associated with higher evaporation and precipitation rates, respectively. Our results show that warm ENSO phases increase evaporation rates by 15 %, whereas cold phases decrease it by 2 %.
dc.description.funderFondo Nacional de Desarrollo Científico y Tecnológico (grant no. 1210221).
dc.fechaingreso.objetodigital2024-09-12
dc.fuente.origenWOS
dc.identifier.doi10.5194/hess-26-3709-2022
dc.identifier.eissn1607-7938
dc.identifier.issn1027-5606
dc.identifier.scopusidSCOPUS_ID:2-s2.0-85134408570
dc.identifier.urihttp://doi.org/10.5194/hess-26-3709-2022
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/87852
dc.identifier.wosidWOS:000825471400001
dc.information.autorucInstituto de Geografía; Lobos Roco, Felipe Andres; 0000-0002-8786-0083; 157192
dc.information.autorucEscuela de Ingeniería; Suarez Poch, Francisco Ignacio; 0000-0002-4394-957X; 15891
dc.issue.numero13
dc.language.isoen
dc.nota.accesocontenido completo
dc.pagina.final3729
dc.pagina.inicio3709
dc.revistaHydrology and Earth System Sciences
dc.rightsacceso abierto
dc.rights.licenseCC BY 4.0 ATTRIBUTION 4.0 INTERNATIONAL
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.subject.ods13 Climate action
dc.subject.odspa13 Acción por el clima
dc.titleMulti-scale temporal analysis of evaporation on a saline lake in the Atacama Desert
dc.typeartículo
dc.volumen26
sipa.codpersvinculados157192
sipa.codpersvinculados15891
sipa.trazabilidadWOS;2022-10-11
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