Streamflow Intensification Driven by the Atlantic Multidecadal Oscillation (AMO) in the Atrato River Basin, Northwestern Colombia
| Autor: | Rodrigo Augusto Ferreira de Souza, Wilfredo Alfonso-Morales, Wilmar Loaiza Cerón, Félix Francés, Rita Valéria Andreoli, Teresita Canchala, Yesid Carvajal-Escobar, Mary Toshie Kayano, Alvaro Avila, Irma Ayes Rivera |
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| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
climate variability
Rainfall INGENIERIA HIDRAULICA lcsh:Hydraulic engineering Rain Geography Planning and Development Sea Surface Temperature (sst) Drainage basin atrato river basin atlantic multidecadal oscillation Sea Level Pressure Biochemistry lcsh:Water supply for domestic and industrial purposes Tropical Atlantic Atlantic Ocean Water Science and Technology geography.geographical_feature_category Upward Movement River Basins Climatology streamflow Watersheds Atrato River basin rainfall Streamflow Colombia Aquatic Science Atrato River Pacific Ocean (central) Atlantic multidecadal oscillation Phase change Rivers lcsh:TC1-978 River Basin 13.- Tomar medidas urgentes para combatir el cambio climático y sus efectos Sea Surface Temperature Climate variability Atlantic Multidecadal Oscillations lcsh:TD201-500 geography Pacific Ocean Tropics Atlantic Ocean (tropical) Stream Flow Sea surface temperature Period (geology) Environmental science Sea Level Daily Rainfall |
| Zdroj: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname Water, Vol 12, Iss 1, p 216 (2020) Repositório Institucional do INPA Instituto Nacional de Pesquisas da Amazônia (INPA) instacron:INPA Water Volume 12 Issue 1 |
| Popis: | The impact of the Atlantic Multidecadal Oscillation (AMO) on the variations in the streamflow in the Atrato River Basin (ARB) during the 1965&ndash 2016 period was analyzed here by considering the cold (1965&ndash 1994) and warm (1995&ndash 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&ndash 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. |
| Databáze: | OpenAIRE |
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