The Paraná River Response to El Niño 1982–83 and 1997–98 Events

Camilloni, Inés Angela; Barros, Vicente

doi:10.1175/1525-7541(2000)001<0412:tprrte>2.0.co;2

Cited by 73 publications

(65 citation statements)

References 18 publications

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“…This enabled estimation of how the interaction between the most active NAO season (Castro-Díez et al, 2002;Muñoz-Díaz et al, 2004;López-Moreno et al, 2007; and other factors, including the intensive water regulation system of the IP and snowmelt processes (BergaCasafont, 2003;Arroyo-Ilera, 2007;Morán-Tejeda et al, 2011), conditioned water availability in subsequent months.…”

Section: North Atlantic Oscillation Indexmentioning

confidence: 99%

“…The interactions between river flow and low-frequency climate patterns have been studied in various hydrological systems worldwide. For example, studies have investigated the use of the El Niño-Southern Oscillation (ENSO) in forecasting river discharge variability in South America (Camilloni and Barros, 2000;Barros et al, 2004), the United States (Barlow et al, 2001;Bradbury et al, 2002;Brito-Castillo et al, 2003), Canada (Burn, 2008), India (Maity and Kumar, 2009), China (Xue et al, 2010) and elsewhere worldwide (Ward et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

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The response of Iberian rivers to the North Atlantic Oscillation

Lorenzo‐Lacruz

Vicente‐Serrano

López‐Moreno

et al. 2011

Hydrol. Earth Syst. Sci.

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Abstract. In this study we analyzed the influence of the North Atlantic Oscillation (NAO) on the streamflow in 187 sub-basins of the Iberian Peninsula. Monthly and one-month lagged correlations were conducted to assess the spatiotemporal extent of the NAO influence on Iberian river discharges. Analysis of the persistence of the winter NAO throughout the year was also undertaken, together with analysis of streamflow anomalies during positive and negative NAO phases. Moving-window correlation analyses were conducted to assess potential changes in the temporal evolution of the NAO influence on Iberian streamflows. The results show that the NAO has a large impact on surface water resources throughout the Iberian Peninsula during winter, and in the Atlantic watershed during autumn. We showed that water resources management and snowmelt are causing the persistent dependence of streamflows on the previous winter NAO. We found that strongly positive streamflow anomalies occurred during winter, especially in the Atlantic watershed, and provide evidence of non-stationarity and spatial variability in the NAO influence on Iberian water resources.

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Section: North Atlantic Oscillation Indexmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

The response of Iberian rivers to the North Atlantic Oscillation

Lorenzo‐Lacruz

Vicente‐Serrano

López‐Moreno

et al. 2011

Hydrol. Earth Syst. Sci.

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“…The 1997-1998 period is considered one of the most important El Niño events (Camilloni and Barros, 2000).…”

Section: Introductionmentioning

confidence: 99%

Modelling the effects of land‐use/land‐cover changes on the near‐surface atmosphere in southern South America

Beltrán‐Przekurat

Pielke

Eastman³

et al. 2011

Intl Journal of Climatology

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ABSTRACT:A fully coupled atmospheric-biospheric regional climate model, GEMRAMS, was used to evaluate potential effects of land-use/land-cover changes (LULCC) on near-surface atmosphere over a southern South American domain at seasonal time scales. In GEMRAMS, leaf area index and canopy conductance are computed based on modelled temperature, solar radiation, and the water status of the soil and air, allowing a two-way interaction between canopy and atmosphere. Several austral spring-early summer simulations were conducted using land cover representing current (i.e. agricultural landscape), natural (i.e. before European settlement), and afforestation scenarios for three periods associated with El Niño-Southern Oscillation (ENSO) conditions. The shift to agriculture resulted in a generalized increase in albedo, reducing the available energy at the near-surface. [Correction added on 21 September 2011 after original online publication: in the preceding sentence the word 'decrease' was corrected to 'increase'.] The energy partitioning between latent and sensible heat fluxes changed, leading to distinct temperature responses. A shift from grass to agriculture led to cooler and wetter near-surface atmospheric conditions. Warmer temperatures resulted from the conversion of wooded grasslands or forest to agriculture. The LULCC-induced signal was spatially heterogeneous and with a seasonal component associated with vegetation phenology. A significant decrease in maximum temperatures in the southern and central Pampas led to a decrease in the diurnal temperature range. Basing on some observational studies in this region our results suggest a potential strong influence of LULCC on the maximum temperatures in central Argentina in summer. Afforestation resulted overall in cooler temperatures. For both LULCC scenarios the direction of the energy fluxes and temperature changes remained in general the same in two extreme ENSO years, although for some vegetation conversions the signal reversed direction. Overall, the impacts were enhanced during a dry year, but the response also depended on the vegetation types involved in the conversion. The effects on precipitation were insignificant in the agriculture-conversion scenario and a general increase was found in the afforested scenario.

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“…Nevertheless, estuarine zones are expected to experience a greater impact of hydrologic effects (fresh water or ocean water inputs) [14]. ENSO impacts in coastal zones include increased rainfall, hydrological changes in basins, modifications in river flow [15], and generation of inter-annual variations in fresh water discharges for estuarine systems [16,17].…”

Section: Introductionmentioning

confidence: 99%

“…ENSO is considered in the RdlP as a large-scale atmospheric forcing effect on the discharges of the tributary rivers [15,17], changes in salinity and nutrients [18], as well as in the location and location of turbidity or salinity fronts [19,20]. Several studies have described the relationship between ENSO events, RdlP flow, and salinity of the estuarine system [18,19,21].…”

Section: Introductionmentioning

confidence: 99%

Weather, Hydrological and Oceanographic Conditions of the Northern Coast of the Río de la Plata Estuary during ENSO 2009–2010

Brugnoli¹,

Verocai²,

Muñiz³

et al. 2018

Estuary

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Climatic, hydrological, and oceanographic conditions were determined during the 2009-2010 El Nino/Southern Oscillation (ENSO) on the north coast of the Río de la Plata (RdlP) estuary. The maximum monthly rainfall was observed in the middle and upper La Plata basin during September 2009 and February 2010 ("El Niño" phase, (EN)). The monthly flow of RdlP showed an increase with rainfall and significant differences between ENSO phases. The wind stress showed fluctuations in both phases, being less intense during EN, during which time maximum flow of RdlP was observed. During the EN phase, increased precipitation contributed to variations in salinity and absence of water column stratification in the north coast of RdlP. This was also associated with variations in Secchi depth, oxygen saturation, and nutrient concentrations. The spatial location of the turbidity front was associated with the flow of the RdlP and wind stress, thus conditioning the physicochemical characteristics of the water column, mainly during EN phase.

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The Paraná River Response to El Niño 1982–83 and 1997–98 Events

Cited by 73 publications

References 18 publications

The response of Iberian rivers to the North Atlantic Oscillation

The response of Iberian rivers to the North Atlantic Oscillation

Modelling the effects of land‐use/land‐cover changes on the near‐surface atmosphere in southern South America

Weather, Hydrological and Oceanographic Conditions of the Northern Coast of the Río de la Plata Estuary during ENSO 2009–2010

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