Silvia Inés RomeroServicio de Hidrografía Naval · Oceanography
Silvia Inés Romero
Physical Oceanographer
Frontal systems, water masses and mechanisms that control the surface dynamics of the ocean in the Southwestern Atlantic
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21
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Introduction
Physical Oceanography - Remote Sensing -Southwestern Atlantic.
Doctor in Atmospheric and Ocean Sciences. University of Buenos Aires, Argentina. 2008. Environmental factors controlling marine ecosystems sensitive to changing conditions. Physical processes driving nutrient enrichment and space-time variability of surface chlor-a concentration as indicator of highly productive areas. Dynamics of continental shelves and shelf-deep ocean interactions. Internal waves.
Publications
Publications (21)
Nuestro trabajo Concentración de clorofila (pages 766 to 775) es parte del capitulo Indicadores, en el Libro "Estado de conservación del Mar Patagónico y Áreas de Influencia"
Detección de eddies de submesoescala en la Plataforma Continental Argentina mediante imágenes VIIRS L2
Internal waves represent an important mechanism of energy exchange influencing primary production through the turbulent transport of nutrients and changes in the intensity of light available for photosynthesis. Internal solitary waves (internal solitons) appear in packages and retain their shape and speed even after interacting with other internal...
Las ondas internas representan un mecanismo importante para el intercambio de energía que influye en la producción primaria a través del transporte turbulento de nutrientes en la columna de agua y los cambios en la intensidad de la luz disponible para la fotosíntesis. En particular, las ondas internas solitarias o “solitones” aparecen en paquetes y...
Primary production hotspots in the marine environment occur where the combination of light, turbulence, temperature and nutrients makes the proliferation of phytoplankton possible. Satellite-derived surface chlorophyll-a distributions indicate that these conditions are frequently associated with sharp water mass transitions named “marine fronts”. G...
El Canal Beagle (CB) es un ambiente marino costero austral complejo, que conecta los océanos Pacífico y Atlántico, y que recibe en su recorrido importantes aportes terrígenos por parte de las cadenas montañosas de los Andes Fueguinos y otros aportes de materia orgánica de origen antrópico por parte de la ciudad de Ushuaia. Entre los días 27 a 31 de...
El Canal Beagle (CB) es un ambiente marino costero austral complejo, que conecta los océanos Pacífico y Atlántico, y que recibe en su recorrido importantes aportes terrígenos por parte de las cadenas montañosas de los Andes Fueguinos y otros aportes de materia orgánica de origen antrópico por parte de la ciudad de Ushuaia. Entre los días 27 a 31 de...
The South-Atlantic Patagonian shelf is the largest chlorophyll-a (Chl-a) hot spot in Southern Ocean color images. While a persistent 1500-km long band of high Chl-a along the shelf-break front (SBF) is indicative of upwelling, the mechanisms that drive it are not entirely known. Along-front wind oscillations can enhance upwelling and provide a nutr...
The spatial and temporal variability observed during the last 25 years at Punta Rasa sandspit is studied in this work. Five images Lansat TM (30 m spatial resolution) corresponding to the years 1987, 1994, 2001, 2007 and 2011 were selected in this study. Each one covers an area of 185 km x 172 km but, for this analysis, a smaller area from latitude...
1] In January 2008, a patch of high reflectance detected by ocean color satellite images was sampled during a cruise over the southern Argentinean continental shelf. High calcite concentrations (particulate inorganic carbon (PIC)) found at the patch were associated with dominance of the coccolithophorid Emiliania huxleyi. Relatively low chlorophyll...
1] In January 2008, a patch of high reflectance detected by ocean color satellite images was sampled during a cruise over the southern Argentinean continental shelf. High calcite concentrations (particulate inorganic carbon (PIC)) found at the patch were associated with dominance of the coccolithophorid Emiliania huxleyi. Relatively low chlorophyll...
The Patagonia continental shelf located off southeastern South America is bounded offshore by the Malvinas Current, which extends northward from northern Drake Passage (~55° S) to nearly 38° S. The transition between relatively warm-fresh shelf waters and Subantarctic Waters from the western boundary current is characterized by a thermohaline front...
Nutrient distributions observed at some depths along the continental shelf from 27°05′S (Brazil) to 39°31′S (Argentina) in winter, 2003 and summer, 2004 related to salinity and dissolved oxygen (mLL−1) and saturation (%) data showed remarkable influences of fresh water discharge over the coastal region and in front of the La Plata estuary. In the s...
Based on the analysis of satellite derived surface chlorophyll-a (CSAT) and concomitant in-situ surface salinity (S) data we show that CSAT estimated by the OC4v4 SeaWiFS retrieval algorithm is a good indicator of surface salinity over a continental shelf dominated by freshwater discharge. The CSAT 'S relation is illustrated for the case of Rio de...
1] Seasonal to interannual variability of satellite derived chlorophyll-a over the Patagonia shelf and shelf break in the western South Atlantic are studied based on 7 years of ocean-color data (1998–2004) from the Sea-Viewing Wide Field-of-View Sensor (SeaWiFS). Strong chlorophyll-a seasonal variability (>4 mg m À3) is observed compared to the ope...
The Plata River, discharges on average 23,000 cubic meters per second of freshwater into the western South Atlantic. The Plata diluted waters are laden with sediments and organic matter, which strongly affect the physical and bio-geo-chemical properties and the circulation over the neighboring ocean. Historical hydrographic data and numerical model...
Satellite ocean colour data from the Sea-Viewing Wide Field-of-View Sensor are analyzed to monitor the space-time variability of the Plata river plume over the continental shelf and slope. SeaWiFS Chlorophyll-a (CSAT) product is used to understand the nature of changes in the colour of waters and how this relates to variations in wind direction and...
The aim of the present work is to give a quantitative assessment of the change in mean wave parameters in the upper Río de la Plata (RDP) by considering a possible change in local winds. A statistical analysis of the sea and swell in the outer RDP, as well as the computation and analysis of their propagation and transformation throughout the interm...
In Argentina, particularly in the province of Buenos Aires, densely populated areas are affected by swell inundations. This paper estimates the return periods of extreme levels, including those fixed by the Dirección Nacional de Planeamiento y Protección Civil (DNPPC) as evacuation warnings. The analysis combines the probability density functions (...
Projects
Projects (3)
¿Quién controla la productividad fitoplanctónica, su ciclo anual y la intensa variabilidad interanual que se ha evidenciado en imagenes satelitales de color del mar?
A largo plazo el proyecto planea contribuir con una gestión responsable de los recursos marinos del Mar Argentino.
A corto y mediano plazo el objetivo de este proyecto es mejorar la descripción del comportamiento de los ecosistemas marinos de la ZEE
Argentina a partir del estudio de la dinámica espacio-temporal del fitoplancton y sus relaciones con el ambiente físico (se basa principalmente en el uso de datos satelitales)
