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109 results on '"Matano, Ricardo P."'

3. Circulation and Cross-Shelf Exchanges in the Northern Shelf of the Southwestern Atlantic: Dynamics

Author

National Science Foundation (US), National Aeronautics and Space Administration (US), Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), European Commission, Consejo Superior de Investigaciones Científicas (España), Govern de les Illes Balears, Ministerio de Ciencia e Innovación (España), Agencia Nacional de Promoción Científica y Tecnológica (Argentina), Universidad Nacional del Sur, Combes, Vincent [0000-0002-0416-1827], Matano, Ricardo P. [0000-0001-5177-4610], Palma, Elbio D. [0000-0001-8816-0436], Combes, Vincent, Matano, Ricardo P., Palma, Elbio D., National Science Foundation (US), National Aeronautics and Space Administration (US), Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), European Commission, Consejo Superior de Investigaciones Científicas (España), Govern de les Illes Balears, Ministerio de Ciencia e Innovación (España), Agencia Nacional de Promoción Científica y Tecnológica (Argentina), Universidad Nacional del Sur, Combes, Vincent [0000-0002-0416-1827], Matano, Ricardo P. [0000-0001-5177-4610], Palma, Elbio D. [0000-0001-8816-0436], Combes, Vincent, Matano, Ricardo P., and Palma, Elbio D.

Abstract

The strong interaction between the Brazil Current and the adjacent shelf is clearly visible in satellite-derived products (sea surface temperature, salinity, and chlorophyll-a concentration). Assessments of circulation features and cross-shelf exchanges from these products are, however, limited to the surface layer. Here we analyze the regional circulation and dynamics using the results of a suite of process-oriented, high-resolution numerical experiments. Passive tracers and Lagrangian floats characterize the exchanges between the shelf and the open ocean, identifying regions of high variability, and assessing the contribution of small-scale eddies to the cross-shelf mass exchanges. We estimate that 0.2–0.4 Sv of the shelf transport variability between 34°S and 25°S comes from ocean internal variability which represents ∼50%–70% of the total variability. Between 25°S and 21°S, internal ocean variability represents more than 90% of the shelf transport variability. We find that generation of cyclonic eddies is more frequent (>15% of the time) at the shelfbreak bights. The core of these eddies contains fresher, colder, and more nutrient-rich shelf waters. Maps of satellite chlorophyll-a concentration suggest that the horizontal and vertical exchanges of mass associated with these eddies are a critical element of the primary production cycle.

Published
2023

4. Physical Oceanography of the SW Atlantic Shelf: A Review

Author

Piola, Alberto R., Palma, Elbio D., Bianchi, Alejandro A., Castro, Belmiro M., Dottori, Marcelo, Guerrero, Raul A., Marrari, Marina, Matano, Ricardo P., Möller, Osmar O., Jr, Saraceno, Martín, Hoffmeyer, Mónica S., editor, Sabatini, Marina E., editor, Brandini, Frederico P., editor, Calliari, Danilo L., editor, and Santinelli, Norma H., editor

Published
2018
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9. Variability of the Shelf Circulation Around South Georgia, Southern Ocean

Author

National Science Foundation (US), National Aeronautics and Space Administration (US), Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Consejo Superior de Investigaciones Científicas (España), European Commission, Universidad de Las Islas Baleares, Ministerio de Ciencia e Innovación (España), Natural Environment Research Council (UK), Combes, Vincent [0000-0002-0416-1827], Matano, R. P. [0000-0001-5177-4610], Meredith, M. P. [0000-0002-7342-7756], Combes, Vincent, Matano, Ricardo P., Meredith, M. P., Young, E. F., National Science Foundation (US), National Aeronautics and Space Administration (US), Ministerio de Ciencia, Innovación y Universidades (España), Agencia Estatal de Investigación (España), Consejo Superior de Investigaciones Científicas (España), European Commission, Universidad de Las Islas Baleares, Ministerio de Ciencia e Innovación (España), Natural Environment Research Council (UK), Combes, Vincent [0000-0002-0416-1827], Matano, R. P. [0000-0001-5177-4610], Meredith, M. P. [0000-0002-7342-7756], Combes, Vincent, Matano, Ricardo P., Meredith, M. P., and Young, E. F.

Abstract

A high-resolution ocean model is used to characterize the variability of the shelf circulation and cross-shelf transport around the South Georgia island (SG). The time-mean shelf circulation consists of a counterclockwise flow with a net onshelf mass flow in the south and a net offshelf mass flow in the north. In the south, the cross-shelf exchanges show a two-layer structure with an offshelf flow below 350 m and onshelf flow above. In the north, the cross-shelf exchanges show a three-layer structure with the onshelf flow found only between 350 and 50 m. Correlation analysis shows that winds and the Southern Antarctic Circumpolar Current Front (SACCF) current modulate the variability of the shelf circulation and cross-shelf transport. Local wind stress is significantly correlated with the coastal currents, mid-shelf jet, and cross-shelf transports in the upper layer, while the SACCF modulates the shelf and cross-shelf transports in the southwestern shelf. Likewise, an Empirical Orthogonal Function analysis indicates that the first mode of shelf circulation variability is highly correlated with the SACCF, while the second mode is explained by the local wind stress and significantly correlated with the Antarctic Oscillation. The El Niño Southern Oscillation does not significantly contribute to the shelf circulation but is significantly correlated with the surface temperature variability. The atmospheric teleconnection drives changes in local heat flux, such that warm El Niño conditions over the equatorial Pacific are associated with a cooling of the SG waters. This superposes local signals onto temperature anomalies advected from upstream in the ACC found in previous studies.

Published
2023

14. A description of the seasonal cycle of the equatorial Atlantic from altimeter data

Author

Schouten, Mathijs W., Matano, Ricardo P., and Strub, Ted P.

Subjects
Rossby waves -- Analysis, Southern oscillation -- Analysis, Ocean currents -- Analysis, Earth sciences
Abstract

To link to full-text access for this article, visit this link: http://dx.doi.org/10.1016/j.dsr.2004.10.007 Byline: Mathijs W. Schouten, Ricardo P. Matano, Ted P. Strub Abstract: From 10 years of high-precision altimeter data, we examine the seasonal sea surface height (SSH) variability of the equatorial Atlantic Ocean. With the exception of the highly energetic North Brazil Current region, the seasonal cycle is the dominant source of variability in this region. As has been known from in situ observations and numerical model simulations, the seasonal adjustment to the wind stress forcing of the ocean leads to a cycle of consecutive Kelvin and Rossby waves. Now, we can also document these processes in their basinwide context by continuous high-quality observations from space. Interannual variations in the strength of the seasonal cycle seem to be connected to ENSO variability in the Pacific, but significant interannual signals unrelated to ENSO are also observed. Author Affiliation: College of Oceanic and Atmospheric Science, Oregon State University, 104 Ocean Admin Bldg., Corvallis (OR) 97331, USA Article History: Received 10 November 2003; Revised 28 July 2004; Accepted 28 October 2004

Published
2005

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