Wind-wave climate change and increasing erosion in the outer Río de la Plata, Argentina

Codignotto, Jorge Osvaldo; Dragani, Walter C.; Martin, P.; Simionato, Claudia G.; Medina, Rubén Alberto; Alonso, Guadalupe

doi:10.1016/j.csr.2012.03.013

Cited by 41 publications

(34 citation statements)

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“…Results are being analyzed and will be presented in an upcoming separate paper. In spite of the fact that significant wave heights are usually low in the outer RDP regionannual mean Hs ranges from 1.0 to 1.3 m (CODIGNOTTO et al, 2012) -events characterized by significant wave heights somewhat higher than 2 m are often recorded in this region. A three-month lapse (September -November, 2005) in wave height data series is selected in order to illustrate this fact (Fig.…”

Section: Discussionmentioning

confidence: 99%

“…Coastal impacts related to a possible wind wave change on the South-eastern South American Continental Shelf were reported by Dragani et al (2011) and Codignotto et al (2012) who studied trends in mean annual wind wave heights implementing Simulating Waves Nearshore (SWAN, BOOIJ, et al, 1999;RIS et al, 1999) model forced with surface winds from National Center for Environmental Prediction/National Center for Atmospheric Research (NCEP/NCAR) Reanalysis I (KALNAY et al, 1996) in a regional domain which includes the Río de la Plata (RDP) estuary and the adjacent continental shelf. The RDP, located on the eastern coast of southern South America at approximately 35°S ( Fig.…”

Section: Introductionmentioning

confidence: 94%

“…These events caused high sea waves associated with hazardous conditions along the southern and southeastern coast of Brazil. Some efforts regarding the implementation of realistic wind forcing on the ocean have been presented by Campetella and Saulo (2003) and Ruiz et al (2010). On the other hand, the unique set of long-term in situ observations of waves available for the region was collected by means of a Datawell Waverider directional wave recorder moored in the outer RDP estuary (Fig.…”

Section: Introductionmentioning

confidence: 99%

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Numerical simulation of wind waves on the Río de la Plata: evaluation of four global atmospheric databases

et al. 2012

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The performance of NCEP/NCAR I, NCEP/DOE II, JRA-25 and ERA-Interim global databases, implemented as atmospheric forcings of the SWAN model in the Río de la Plata region, was quantitatively tested by calculating the bias, the mean square root error, the determination coefficient and the slope of the line fitted between observed and simulated wave parameters (significant wave height, mean period and direction). Even though statistical estimators showed no evident differences for wave periods and directions some noticeable differences were observed for simulated significant wave heights depending on the forcing used. The lowest bias (0.22 m) was obtained when the SWAN model was forced by ERA-Interim. With regard to the mean square root errors, the lowest values were obtained when NCEP/NCAR I (0.16 m) and NCEP/DOE II (0.19 m) were used as forcing. In addition, the best slope for simulated heights (0.79) was obtained using NCEP/DOE II. Computed determination coefficients for heights, periods and directions were very similar (0.89-0.93) for all the simulations carried out in this study. Energetic and severe wave events were given special consideration. The most energetic wave episode recorded in the Río de la Plata mouth (24 August, 2005) was analyzed and discussed in particular. It was concluded that during energetic atmospheric conditions the best agreement is achieved by implementing NCEP/DOE II as forcing. In the light of these results it is concluded that NCEP/DOE II is the most suitable atmospheric forcing to simulate wave heights with the SWAN model in the Río de la Plata region.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 94%

Section: Introductionmentioning

confidence: 99%

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Numerical simulation of wind waves on the Río de la Plata: evaluation of four global atmospheric databases

et al. 2012

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“…He shows that shoreline variability is probably not influenced directly by sea-level change but that ENSO-related variation in wind direction and wave climate, together with local anthropogenic and autogenic shoreline processes, control much of the observed shoreline behaviour. Another study by Codignotto et al (2012) attributes increasingly rapid shoreline erosion in the outer Río de la Plata estuary, Argentina, to an increase in the frequency and height of easterly and east-southeasterly waves acting in concert with an increase in the magnitude, duration and frequency of storm surges and background sealevel rise. Changing climate thus forces coastal morphological responses along multiple interacting pathways, both direct and indirect.…”

Section: Contemporary Coast-climate Linkagesmentioning

confidence: 99%

Coasts and climate

French

Burningham

2013

Progress in Physical Geography: Earth and Environment

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Geomorphology is increasingly engaged with the connections between coastal behaviour and climate variability and change. While impacts of climate change at the coast are often primarily viewed in terms of landform adjustments to accelerated sea-level rise, geomorphologists are also starting to unlock the subtleties of how coastal processes are forced by a broader suite of climate factors. This progress report highlights three main strands of recent geomorphological research in this vein: the search for a broader suite of climatic signatures in recent coastal deposits; empirical analyses of the linkages between climate variables and contemporary shoreline change; and enhancement of our capability to predictively model climate-driven changes in coastal morphology.

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“…A significant increment in frequency and height of waves towards the Samborombón Bay (CODIGNOTTO et al, 2012), a regime shift in sea surface temperature, wind stress, and surface currents (AUAD; MARTOS, 2012), an increasing speed and monthly frequency of southern winds (ORTEGA et al, 2012), and an increase in the regional rainfall and river runoff were documented in the RdlP drainage basin during the 20th century (PASQUINI; DEPETRIS, 2007). This evidences that the RdlP region is under the influence of climatic variability, which coupled with a major change in resource exploitation and management (JAUREGUIZAR; MILESSI, 2008) and anthropogenic influence (discharge of domestic effluents, port activity, dredging, introduction of exotic species, and growing urbanization (CAROL et al, 2007;GARCÍA et al, 2010)), can amplify the magnitude of change in the use of the different estuarine habitats of the RdlP by fish.…”

Section: Introductionmentioning

confidence: 99%

Fish assemblages in a small temperate estuary on the Argentinian coast: spatial variation, environmental influence and relevance as nursery area

et al. 2015

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The effects of different environmental variables on the fish community structure were evaluated in a small temperate estuary. The biological and environmental data were collected bimonthly between 2007 and 2009 along the main estuarine axis. Multivariate analyses were applied (CLUSTER, SIMPER, CCA) to determine the spatial structure of fish community and to estimate the environmental influence on it. A total of 48 species of "teleost" fishes were observed, with the families Characidae and Sciaenidae presenting the largest number of species, 90% of the catches being juveniles. The fish community was overwhelmingly dominated by one species (Micropogonias furnieri, 88.9%), and only four species contributed more than 1% of total catch (Odontesthes argentinensis5.4%, Brevoortia aurea 1.1%, Paralonchurus brasiliensis 1.1%, and Mugil platanus 1.0%). Estuarine and freshwater stragglers dominated in number of species, followed by freshwater migrants and marine migrants. Three areas with different fish assemblages, with distinctive species and functional guilds, were defined along the main axis. The occurrence and spatial spread of these areas were linked to spatial variation in salinity, which was consistently influenced by discharge from the Río de la Plata and local precipitation. The results highlight the importance of shallow environments as nursery areas and permit emphasis on their susceptibility to environmental changes.

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Wind-wave climate change and increasing erosion in the outer Río de la Plata, Argentina

Cited by 41 publications

References 24 publications

Numerical simulation of wind waves on the Río de la Plata: evaluation of four global atmospheric databases

Numerical simulation of wind waves on the Río de la Plata: evaluation of four global atmospheric databases

Coasts and climate

Fish assemblages in a small temperate estuary on the Argentinian coast: spatial variation, environmental influence and relevance as nursery area

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