Patterns of sea surface temperature variability on seasonal to sub-annual scales at and offshore the Río de la Plata estuary

Simionato, Claudia G.; Tejedor, Moira Luz Clara; Campetella, Claudia Marcela; Guerrero, Ricardo; Moreira, Diego

doi:10.1016/j.csr.2010.09.012

Cited by 43 publications

(32 citation statements)

References 41 publications

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“…Because estuaries and coastal seas are often shallow and have limited exchange with the open ocean, their water temperatures are closely linked to air temperature and therefore have the potential to be more responsive to climate warming than the open ocean. This is apparent in spatial comparisons between estuaries and adjacent ocean waters such as Rio de La Plata Estuary in Argentina, where summer surface water temperatures are 4 °C warmer than the nearby ocean (Simionato et al ., ). The accelerated warming of coastal seas and estuaries is apparent in temporal trends (Fig.…”

Section: Temperature Effects On Physical Drivers Of Hypoxiamentioning

confidence: 97%

Climate change and dead zones

Altieri

Gedan

2014

Global Change Biology

335

214

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Estuaries and coastal seas provide valuable ecosystem services but are particularly vulnerable to the co-occurring threats of climate change and oxygen-depleted dead zones. We analyzed the severity of climate change predicted for existing dead zones, and found that 94% of dead zones are in regions that will experience at least a 2 °C temperature increase by the end of the century. We then reviewed how climate change will exacerbate hypoxic conditions through oceanographic, ecological, and physiological processes. We found evidence that suggests numerous climate variables including temperature, ocean acidification, sea-level rise, precipitation, wind, and storm patterns will affect dead zones, and that each of those factors has the potential to act through multiple pathways on both oxygen availability and ecological responses to hypoxia. Given the variety and strength of the mechanisms by which climate change exacerbates hypoxia, and the rates at which climate is changing, we posit that climate change variables are contributing to the dead zone epidemic by acting synergistically with one another and with recognized anthropogenic triggers of hypoxia including eutrophication. This suggests that a multidisciplinary, integrated approach that considers the full range of climate variables is needed to track and potentially reverse the spread of dead zones.

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Section: Temperature Effects On Physical Drivers Of Hypoxiamentioning

confidence: 97%

Climate change and dead zones

Altieri

Gedan

2014

Global Change Biology

335

214

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“…Los mejores coeficientes de correlación, fueron los obtenidos con uno y dos meses de retraso en la descarga del RBe con respecto a la concentración del MPS. Este retraso en el aporte de los sedimentos por parte del RBe hasta llegar a la región del RdlP, fue similar a la estimación previa realizada por Simionato et al (2009) y Moreira et al (2013. El RBe, presenta un régimen hidrológico estacional bien definido.…”

Section: Discussionunclassified

Material Particulado en Suspensión en el Río de la Plata: importancia del río Bermejo en su variabilidad espacio-temporal

2018

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Resumen: La variabilidad espacio-temporal del Material Particulado en Suspensión (MPS) en el Río de la Plata (RdlP) fue analizada para el periodo 2002-2014 a partir de datos Aqua-MODIS (Moderate Resolution Imaging Spectroradiometer), y posteriormente se explicó su variabilidad en términos de sus principales tributarios. La media mensual de la concentración del MPS mostró, un máximo a partir de fines del verano hasta mediados de otoño, y un mínimo, a partir de mediados del invierno hasta comienzos del verano. El río Bermejo (RBe), es el tributario que más sedimentos en suspensión transporta, situación que se reflejó en la relación significativa hallada entre la concentración media mensual del MPS y la descarga mensual promedio del RBe. La variación estacional del MPS, tuvo valores máximos durante el otoño y el verano, y valores mínimos en el invierno y la primavera, reflejando así el patrón mensual de descarga del RBe con uno y dos meses de retraso. La variación espacial evidenció tres regiones: interior, central y exterior. Por su parte, la variabilidad anual denotó una marcada estacionalidad en el patrón de cobertura espacial de las aguas con mayor concentración de MPS. La distribución de las anomalías estuvo relacionada con la influencia de la descarga de los ríos, lo que puso de manifiesto que el patrón temporal no está vinculado con el ciclo ENSO (El Niño -Sourthen Oscillation). Estos resultados nos permitieron denotar la importancia del RBe (no ENSO dependiente) para explicar el patrón de anomalías del MPS observado en el RdlP.Palabras clave: telemetría, Material Particulado en Suspensión, Río de la Plata, río Bermejo, variabilidad espacio-temporal, ENSO. Suspended Particulate Matter in the Río de la Plata: importance in its spatial and temporal variability of the Bermejo riverAbstract: Spatio-temporal variability of Suspended Particulate Matter (SPM) in the Río de la Plata (RdlP) is analyzed from 2002-2014 of MODIS (Moderate Resolution Imaging Spectroradiometer) data and explained in terms of its main tributaries flows. The monthly mean showed maximum during late summer to mid-autumn, and minimum in mid-winter to early summer. The Bermejo river (BeR), is the tributary that more sediment in suspension brings. This situation was reflected in the significant relationship between the mean monthly concentrations of SPM with the average monthly flow of BeR. Seasonal variation in SPM concentration, showed maximum values in fall, followed by summer, and minimum values in winter and spring, reflecting the monthly pattern of discharge of the BeR with one and two months of delay. The pattern of spatial variation differentiated threes regions: the inner, central and outer. The annual variability

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“…, 2005) because they control the surface salinity patterns and mixing processes (Guerrero et al. , 1997; Simionato et al. , 2001, 2004, 2007, 2010; Acha et al.…”

Section: Discussionmentioning

confidence: 99%

“…The estuary is characterized by a semi‐permanent salt‐wedge regime (Guerrero et al. , 1997), its fast reaction to atmospheric forcing (Simionato et al. , 2006, 2007, 2010; Meccia et al.…”

Section: Introductionmentioning

confidence: 99%

“…In this way, the reproductive success of M. furnieri appears to be linked to the dynamics of the estuarine waters. The estuary is characterized by a semi-permanent salt-wedge regime (Guerrero et al, 1997), its fast reaction to atmospheric forcing (Simionato et al, 2006(Simionato et al, , 2007(Simionato et al, , 2010Meccia et al, 2009), its low tidal amplitude (Simionato et al, 2004) and its weak seasonality in river discharge (Guerrero et al, 1997). At larger temporal scales, however, the system is under the effects of large river discharge variations, which are primarily associated with the El Niñ o Southern Oscillation (ENSO) cycle (e.g., Depetris et al, 1996;Robertson and Mechoso, 1998).…”

Section: Introductionmentioning

confidence: 99%

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Climate‐induced year‐class fluctuations of whitemouth croaker Micropogonias furnieri (Pisces, Sciaenidae) in the Río de la Plata estuary, Argentina–Uruguay

Marcelo

Simionato

Carozza

et al. 2011

Fisheries Oceanography

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The whitemouth croaker, Micropogonias furnieri, is exploited by coastal fisheries in the Plata estuary. Its age structure shows the predominance of certain year classes, which are indicative of recruitment variability. The estuary is affected by river discharge variations associated with climatic signals (El Niño Southern Oscillation and others). We hypothesize that recruitment may correlate: (i) negatively with runoff (low runoff would promote the stronger retention of ichthyoplankton); (ii) positively with temperature (higher temperatures should enhance larvae survivorship and/or expand the spawning season); and (iii) positively with the wind zonal component (stronger onshore winds should facilitate the retention of ichthyoplankton). A time series of the relative cohort strengths was constructed for the 1938–2000 period from the age frequencies based on otolith readings. We performed a spectral analysis of the biological and physical series, and we searched for co‐movements between them, which suggested the presence of mechanistic links. The results showed co‐movements for recruitment, runoff and air temperature series at approximately 6.5, 3.4 and 2.4 yr; the temperature reinforced the runoff effects on recruitment at the 6.5‐yr peak, and it weakened them at the 3.4‐ and 2.4‐yr peaks. Wind variability was not relevant for the time scales studied. To explore the mechanisms of retention, we modeled the effects of the runoff fluctuations on the dispersal of the eggs. Both the statistical and modeling results supported the hypothesis that the effects of extreme river discharges on retention may regulate croaker recruitment by promoting high (low) recruitment during low (high) discharge periods.

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Patterns of sea surface temperature variability on seasonal to sub-annual scales at and offshore the Río de la Plata estuary

Cited by 43 publications

References 41 publications

Climate change and dead zones

Climate change and dead zones

Material Particulado en Suspensión en el Río de la Plata: importancia del río Bermejo en su variabilidad espacio-temporal

Climate‐induced year‐class fluctuations of whitemouth croaker Micropogonias furnieri (Pisces, Sciaenidae) in the Río de la Plata estuary, Argentina–Uruguay

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