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Connection between El Niño-Southern Oscillation events and river nitrate concentrations in a Mediterranean river

AutorVegas-Vilarrúbia, Teresa ; Sigrò, Javier; Giralt, Santiago
Palabras claveAtmospheric teleconnections
Drought
Interannual nitrate variability
La Niña events
Nitrate pollution
Palmer Drought Severity Index
Fecha de publicación2012
EditorElsevier
CitaciónScience of the Total Environment 426: 446- 453 (2012)
ResumenThe causes of interannual nitrate variability in rivers remain uncertain, but extreme climatic events have been suggested as drivers of large nitrate inputs to rivers. Based on a 24-year data set (1983-2006), we suggest that El Niño-Southern Oscillation (ENSO) can affect nitrate behavior in a seasonal extra-tropical stream, the Llobregat (NE Iberian Peninsula), located thousands of kilometers away from the ENSO oscillating system via atmospheric teleconnections. Two commonly used indices, the Southern Oscillation Index (SOI) and the self-calibrating-Palmer Drought Severity Index (scPDSI) showed highly significant correlations with nitrate concentrations, which recurrently increased during La Niña phases, coinciding with severe droughts. © 2012 Elsevier B.V.
Versión del editor10.1016/j.scitotenv.2012.03.079
URIhttp://hdl.handle.net/10261/77541
DOI10.1016/j.scitotenv.2012.03.079
Identificadoresdoi: 10.1016/j.scitotenv.2012.03.079
issn: 0048-9697
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