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Open AccessArticle

Streamflow Intensification Driven by the Atlantic Multidecadal Oscillation (AMO) in the Atrato River Basin, Northwestern Colombia

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Department of Geography, Faculty of Humanities, Universidad del Valle, Calle 13 #100-00, Cali 25360, Colombia
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Postgraduation Program CLIAMB, Instituto Nacional de Pesquisas da Amazônia (INPA)—Universidade do Estado do Amazonas (UEA), Ave. André Araújo 2936, Manaus 69060-001, Brazil
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Instituto Nacional de Pesquisas Espaciais, Centro de Previsão de Tempo e Estudos Climáticos, Divisão de Modelagem e Desenvolvimento. Av. dos Astronautas 1758, São José dos Campos 12227-010, Brazil
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Escola Superior de Tecnologia, Universidade do Estado do Amazonas, Av. Darcy Vargas 1200, Parque 10 de Novembro, Manaus 69065-020, Brazil
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Department of Agricultural Engineering, Federal University of Viçosa, Viçosa 36570-900, Brazil
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Research Group in Water Resources Engineering and Soil (IREHISA), School of natural Resources and Environmental Engineering, Universidad del Valle, Calle 13 #100-00, Cali 25360, Colombia
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Research Group of Hydrological and Environmental Modelling (GIMHA), Research Institute of Water and Environmental Engineering (IIAMA), Universitat Politècnica de València, 46022 Valencia, Spain
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Research Group of Perception and Intelligent Systems (PSI), School of Electrical and Electronic Engineering, Universidad del Valle, Calle 13 #100-00, Cali 25360, Colombia
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Engineering School, Natural and Environmental Resources Engineering School (EIDENAR), Universidad del Valle, Calle 13 #100-00, Cali 25360, Colombia
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Author to whom correspondence should be addressed.
Water 2020, 12(1), 216; https://doi.org/10.3390/w12010216
Received: 4 November 2019 / Revised: 17 December 2019 / Accepted: 23 December 2019 / Published: 13 January 2020
(This article belongs to the Special Issue Effects of Oceanic-Atmospheric Oscillations on Rivers)
The impact of the Atlantic Multidecadal Oscillation (AMO) on the variations in the streamflow in the Atrato River Basin (ARB) during the 1965–2016 period was analyzed here by considering the cold (1965–1994) and warm (1995–2015) phases of this oscillation. The mean streamflow increased after 1994 (AMO phase change). This increase is related to the strengthening of the zonal gradients of the sea surface temperature (SST) and sea level pressure (SLP) between the tropical central Pacific and the tropical Atlantic after 1994 (warm AMO phase). These gradients contributed to strengthen the Walker cell related upward movement over northern and northwestern South America, in particular during November-December (ND). Consistently, the frequency (R20 mm) and intensity (SDII) of extreme daily rainfall events increased during the 1995–2015 period. Our results show a connection between the AMO and the increase in the streamflow in the ARB during the last five decades. These results contribute to the studies of resilience and climate adaptation in the region. View Full-Text
Keywords: Atlantic multidecadal oscillation; climate variability; streamflow; rainfall; Atrato River basin Atlantic multidecadal oscillation; climate variability; streamflow; rainfall; Atrato River basin
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MDPI and ACS Style

Loaiza Cerón, W.; Toshie Kayano, M.; Andreoli, R.V.; Avila, A.; Canchala, T.; Francés, F.; Ayes Rivera, I.; Alfonso-Morales, W.; Ferreira de Souza, R.A.; Carvajal-Escobar, Y. Streamflow Intensification Driven by the Atlantic Multidecadal Oscillation (AMO) in the Atrato River Basin, Northwestern Colombia. Water 2020, 12, 216.

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