Index Catalog // ScholarsArchive@OSU

Numerical experiments on the effects of a meridional ridge on the transmission of energy by barotropic Rossby waves

Creator:: Matano, Ricardo P.
Abstract:: Analytical and numerical models are used to study the effects of a meridional ridge on the propagation of barotropic Rossby waves produced by distant wind stress forcing. The analytical model illustrates the qualitative aspects of the problem by solving a simplified form of the potential vorticity equation. The analytical results...
Resource Type:: Article

A two-way nested simulation of the oceanic circulation in the Southwestern Atlantic

Creator:: Combes, Vincent and Matano, Ricardo P.
Abstract:: This article presents the results of a high-resolution (1/12°), two-way nested simulation of the oceanic circulation in the southwestern Atlantic region. A comparison between the model results and extant observations indicates that the nested model has skill in reproducing the best-known aspects of the regional circulation, e.g., the volume transport...
Resource Type:: Article
Full Text:: oceanic circulation in the Southwestern Atlantic Vincent Combes1 and Ricardo P. Matano1 1College of Earth

The Low-Frequency Variability of the Southern Ocean Circulation

Creator:: Giarolla, Emanuel and Matano, Ricardo P.
Abstract:: Abstract: Long time series of sea surface height (SSH), sea surface temperature, and wind stress curl are used to determine the main modes of low-frequency variability of the Southern Ocean (SO) circulation. The dominant mode is a trend of increasing SSH at an average rate of 3.3 mm yr(-1). Similar...
Resource Type:: Article
Full Text:: Southern Ocean Circulation EMANUEL GIAROLLA CPTEC/INPE, S~ao Jos�e dos Campos, Brazil RICARDO P. MATANO

Trends in the Brazil/Malvinas Confluence region

Creator:: Combes, Vincent and Matano, Ricardo P.
Abstract:: Observations show abrupt changes in the oceanic circulation of the southwestern Atlantic. These studies report a southward drift of the Brazil/Malvinas Confluence (BMC) and a change in the spectral characteristics of the Malvinas Current (MC) transport. We address the cause of these changes using the result of a high-resolution numerical...
Resource Type:: Article
Full Text:: /sa-termsofuse Trends in the Brazil/Malvinas Confluence region Vincent Combes1 and Ricardo P

Formation and pathways of the intermediate water in the Parallel Ocean Circulation Model's Southern Ocean

Creator:: Schouten, Mathijs W. and Matano, Ricardo P.
Abstract:: The formation mechanisms and pathways of intermediate water in the Southern Ocean are analyzed from output of a high-resolution ocean general circulation model. Deep winter mixed layer formation in the Southern Ocean is diagnosed from the model results and is found to be mostly consistent with observations. Diapycnal water mass...
Resource Type:: Article
Full Text:: in the Parallel Ocean Circulation Model’s Southern Ocean Mathijs W. Schouten1,2 and Ricardo P

The Upstream Spreading of Bottom-Trapped Plumes

Creator:: Matano, Ricardo P. and Palma, Elbio D.
Abstract:: It is well known that numerical simulations of freshwater discharges produce plumes that spread in the direction opposite to that of the propagation of coastally trapped waves (the upstream direction). The lack of a theory explaining these motions in unforced environments deemed the numerical results suspect. Thus, it became a...
Resource Type:: Article
Full Text:: Plumes RICARDO P. MATANO College of Oceanic and Atmospheric Sciences, Oregon State University

On the Upwelling of Downwelling Currents

Creator:: Matano, Ricardo P. and Palma, Elbio D.
Abstract:: The term “downwelling currents” refers to currents with a downslope mass flux in the bottom boundary layer. Examples are the Malvinas and Southland Currents in the Southern Hemisphere and the Oyashio in the Northern Hemisphere. Although many of these currents generate the same type of highly productive ecosystems that is...
Resource Type:: Article
Full Text:: On the Upwelling of Downwelling Currents RICARDO P. MATANO

A numerical study of the Magellan Plume

Creator:: Palma, Elbio D. and Matano, Ricardo P.
Abstract:: In this modeling study we investigate the dynamical mechanisms controlling the spreading of the Magellan Plume, which is a low-salinity tongue that extends along the Patagonian Shelf. Our results indicate that the overall characteristics of the plume (width, depth, spreading rate, etc.) are primarily influenced by tidal forcing, which manifests...
Resource Type:: Article
Full Text:: the Magellan Plume Elbio D. Palma1 and Ricardo P. Matano2 Received 10 November 2011; revised 16

The Spindown of Bottom-Trapped Plumes

Creator:: Matano, Ricardo P. and Palma, Elbio D.
Abstract:: This note considers the decay of a bottom-trapped freshwater plume after the causative freshwater inflow has ceased. It is shown that shortly after the low-density inflow stops, the barotropic pressure field that it created radiates away and the ocean circulation becomes controlled by baroclinic pressure gradients generated by the remnants...
Resource Type:: Article
Full Text:: Bottom-Trapped Plumes RICARDO P. MATANO College of Oceanic and Atmospheric Sciences, Oregon State

The Impact of Boundary Conditions on the Upstream Spreading of Bottom-Trapped Plumes

Creator:: Matano, Ricardo P. and Palma, Elbio D.
Abstract:: This study shows that simulations of bottom-trapped plumes in periodic or closed domains generate a spurious cyclonic current that arrests the natural tendency of the plume to move upstream. Furthermore, it also shows that attempts to obstruct the upstream spreading lead to a bias of the fundamental characteristics of the...
Resource Type:: Article
Full Text:: Upstream Spreading of Bottom-Trapped Plumes RICARDO P. MATANO College of Earth, Ocean, and Atmospheric

Dynamical analysis of the upwelling circulation off central Chile

Creator:: Mesias, Jorge M., Matano, Ricardo P., and Strub, P. Ted
Abstract:: In this article we analyze the momentum and vorticity balances of a numerical simulation of the upwelling circulation off central Chile (34° –40°S) and its response to interannual local wind changes. Our analysis indicates that the path of the upwelling jet is strongly controlled by the bottom topography. This topographic...
Resource Type:: Article
Full Text:: circulation off central Chile Jorge M. Mesias,1 Ricardo P. Matano, and P. Ted Strub College of Oceanic and

A numerical study of the upwelling circulation off central Chile

Creator:: Mesias, Jorge M., Matano, Ricardo P., and Strub, P. Ted
Abstract:: We present a modeling study of the upwelling ocean circulation off central Chile (34°–40°S). Using a primitive equation model, we make a numerical simulation of the ocean circulation for summer of 1993, a year characterized by moderate but persistent equatorward winds. The results indicate the formation of an eastern boundary...
Resource Type:: Article

Shelfbreak upwelling induced by alongshore currents: analytical and numerical results

Creator:: Miller, Robert N., Matano, Ricardo P., and Palma, Elbio D.
Abstract:: Alongshore flow in the direction of propagation of coastal trapped waves can result in upwelling at the shelfbreak. The intensity of this upwelling can be comparable in magnitude to wind-driven coastal upwelling, with its associated ecological features. Recent numerical experiments by Matano & Palma indicate that this upwelling results from...
Resource Type:: Article
Full Text:: : analytical and numerical results Robert N. Miller1,2†, Ricardo P. Matano1 and Elbio D. Palma3 1 College of

Shelfbreak upwelling induced by alongshore currents: analytical and numerical results

Creator:: Miller, Robert N., Matano, Ricardo P., and Palma, Elbio D.
Abstract:: Alongshore flow in the direction of propagation of coastal trapped waves can result in upwelling at the shelfbreak. The intensity of this upwelling can be comparable in magnitude to wind-driven coastal upwelling, with its associated ecological features. Recent numerical experiments by Matano & Palma indicate that this upwelling results from...
Resource Type:: Article
Full Text:: currents: analytical and numerical results Robert N. Miller1,2†, Ricardo P. Matano1 and Elbio D. Palma3 1

A numerical study of the Southwestern Atlantic Shelf circulation : stratified ocean response to local and offshore forcing

Creator:: Palma, Elbio D., Matano, Ricardo P., and Piola, Alberto R.
Abstract:: This article discusses the results of a suite of numerical simulations of the oceanic circulation in the Southwestern Atlantic Shelf region that are aimed to characterize its mean circulation and seasonal variability and to determine the dynamical mechanisms controlling them. Our experiments indicate that south of 40°S the mean circulation...
Resource Type:: Article
Full Text:: Ricardo P. Matano,3 and Alberto R. Piola4,5,6 Received 3 January 2008; revised 12 May 2008; accepted 16

A numerical study of the Southwestern Atlantic Sheld circulation : barotropic response to tidal and wind forcing

Creator:: Palma, Elbio D., Matano, Ricardo P., and Piola, Alberto R.
Abstract:: This article analyzes the barotropic circulation in the Southwestern Atlantic Shelf using a three-dimensional numerical model forced with winds and tides. South of 40°S, the shelf circulation is dominated by the propagation of the semidiurnal tides. In this region the diurnal tides are generally weak, except at the shelf edge...
Resource Type:: Article
Full Text:: de Fı́sica, Universidad Nacional del Sur, Bahı́a Blanca, Argentina Ricardo P. Matano College of

Atomspheric driving forces for the Agulhas Current in the subtropics

Creator:: Fetter, A., Lutjeharms, J. R. E., and Matano, Ricardo P.
Abstract:: The Agulhas Current is the western boundary current of the South Indian Ocean and is thought to play an important role in the global overturning circulation. In this study, we investigate the contribution from the wind stress field over each ocean basin of the southern hemisphere to the variability of...
Resource Type:: Article
Full Text:: depth of the Agulhas Current may decrease from 3000 to 2300 m over a period of less than 3 months

Geostrophic Velocity Measurement Techniques for the Meridional Overturning Circulation and Meridional Heat Transport in the South Atlantic

Creator:: Perez, Renellys C., Garzoli, Silvia L., Meinen, Christopher S., and Matano, Ricardo P.
Abstract:: Two ocean general circulation models are used to test the ability of geostrophic velocity measurement systems to observe the meridional overturning circulation (MOC) and meridional heat transport (MHT) in the South Atlantic. Model sampling experiments are conducted at five latitudes (between 15° and 34.5°S) spanning the range of extratropical current...
Resource Type:: Article
Full Text:: . MEINEN NOAA/Atlantic Oceanographic and Meteorological Laboratory, Miami, Florida RICARDO P. MATANO

A comparison of the circulation patterns over the Southwestern Atlantic Shelf driven by different wind stress climatologies

Creator:: Palma, Elbio D., Matano, Ricardo P., Piola, Alberto R., and Sitz, Lina E.
Abstract:: We compare the oceanic circulation patterns over the Southwestern Atlantic Shelf (SWAS) forced by nine different wind stress climatologies. The largest differences are observed in experiments forced with the Hellerman and Rosenstein [1983, hereafter HR83] and Trenberth et al. [1990, hereafter TR90] winds. HR83 shows a general northeastward flow near...
Resource Type:: Article
Full Text:: Ricardo P. Matano,3 Alberto R. Piola,4 and Lina E. Sitz1 Received 21 July 2004; accepted 27 October 2004

StrubPCEOASAltimeterDerivedSeasonal.pdf

Creator:: Strub, P. Ted, James, Corinne, Combes, Vincent, Matano, Ricardo P., and et al.
Abstract:: Altimeter sea surface height (SSH) fields are analyzed to define and discuss the seasonal circulation over the wide continental shelf in the SW Atlantic Ocean (27°–43°S) during 2001–2012. Seasonal variability is low south of the Rio de la Plata (RdlP), where winds and currents remain equatorward for most of the...
Full Text:: shelf: 278–438S P. Ted Strub1, Corinne James1, Vincent Combes1, Ricardo P. Matano1, Alberto R. Piola2

StrubPCEOASAltimeterDerivedSeasonalSupportingInfoS1.pdf

Creator:: Strub, P. Ted, James, Corinne, Combes, Vincent, Matano, Ricardo P., and et al.
Abstract:: Altimeter sea surface height (SSH) fields are analyzed to define and discuss the seasonal circulation over the wide continental shelf in the SW Atlantic Ocean (27°–43°S) during 2001–2012. Seasonal variability is low south of the Rio de la Plata (RdlP), where winds and currents remain equatorward for most of the...
Full Text:: James1, Vincent Combes1, Ricardo P. Matano1, Alberto R. Piola2, Elbio D. Palma3, Martin Saraceno4, Raul

Seasonal variability in the Agulhas Retroflection region

Creator:: Matano, Ricardo P., Simionato, C. G., de Ruijter, W. P., van Leeween, P. J., Strub, P. Ted, Chelton, Dudley B., and Schlax, M. G.
Abstract:: The objective of this article is to present evidence for the existence of seasonal variability in sea surface height (SSH) anomaly in the Agulhas Retroflection region. TOPEX/POSEIDON altimeter data are used to estimate seasonal changes in the mesoscale SSH variability. There is a seasonal oscillation of SSH variability characterized by...
Resource Type:: Article

The influence of the Plata River discharge on the western South Atlantic shelf

Creator:: Piola, Alberto R., Matano, Ricardo P., Palma, Elbio D., Moller, Osmar O., and Campos, Edmo J. D.
Abstract:: The influence of the Plata, the second largest river in South America, extends along a coastal strip of 1300 km. Historical hydrographic and wind data and numerical simulations are combined to determine the seasonal and interannual variability of the Plata plume and its relationship to the magnitude of the river...
Resource Type:: Article
Full Text:: the western South Atlantic shelf Alberto R. Piola,1 Ricardo P. Matano,2 Elbio D. Palma,3 Osmar O

MatanoRicardoCEOASSalinitySignatureCross.pdf

Creator:: Guerrero, Raul A., Piola, Alberto R., Fenco, Harold, Matano, Ricardo P., Combes, Vincent, Chao, Yi, James, Corinne, Palma, Elbio D., Saraceno, Martin, and Strub, P. Ted
Abstract:: Satellite-derived sea surface salinity (SSS) data from Aquarius and SMOS are used to study the shelf-open ocean exchanges in the western South Atlantic near 35°S. Away from the tropics, these exchanges cause the largest SSS variability throughout the South Atlantic. The data reveal a well-defined seasonal pattern of SSS during...
Full Text:: . R., Fenco, H., Matano, R. P., Combes, V., Chao, Y., James, C., Palma, E. D., Saraceno, M., & Ted

MatanoRicardoCEOASSalinitySignatureCross_SupportingInformation.pdf

Creator:: Guerrero, Raul A., Piola, Alberto R., Fenco, Harold, Matano, Ricardo P., Combes, Vincent, Chao, Yi, James, Corinne, Palma, Elbio D., Saraceno, Martin, and Strub, P. Ted
Abstract:: Satellite-derived sea surface salinity (SSS) data from Aquarius and SMOS are used to study the shelf-open ocean exchanges in the western South Atlantic near 35°S. Away from the tropics, these exchanges cause the largest SSS variability throughout the South Atlantic. The data reveal a well-defined seasonal pattern of SSS during...
Full Text:: hydrographic observations collected between the 50 and 1000 m isobaths (a). Yearly number of observations (b

ScholarsArchive@OSU

Numerical experiments on the effects of a meridional ridge on the transmission of energy by barotropic Rossby waves

A two-way nested simulation of the oceanic circulation in the Southwestern Atlantic

The Low-Frequency Variability of the Southern Ocean Circulation

Trends in the Brazil/Malvinas Confluence region

Formation and pathways of the intermediate water in the Parallel Ocean Circulation Model's Southern Ocean

The Upstream Spreading of Bottom-Trapped Plumes

On the Upwelling of Downwelling Currents

A numerical study of the Magellan Plume

The Spindown of Bottom-Trapped Plumes

The Impact of Boundary Conditions on the Upstream Spreading of Bottom-Trapped Plumes

Dynamical analysis of the upwelling circulation off central Chile

A numerical study of the upwelling circulation off central Chile

Shelfbreak upwelling induced by alongshore currents: analytical and numerical results

Shelfbreak upwelling induced by alongshore currents: analytical and numerical results

A numerical study of the Southwestern Atlantic Shelf circulation : stratified ocean response to local and offshore forcing

A numerical study of the Southwestern Atlantic Sheld circulation : barotropic response to tidal and wind forcing

Atomspheric driving forces for the Agulhas Current in the subtropics

Geostrophic Velocity Measurement Techniques for the Meridional Overturning Circulation and Meridional Heat Transport in the South Atlantic

A comparison of the circulation patterns over the Southwestern Atlantic Shelf driven by different wind stress climatologies

StrubPCEOASAltimeterDerivedSeasonal.pdf

StrubPCEOASAltimeterDerivedSeasonalSupportingInfoS1.pdf

Seasonal variability in the Agulhas Retroflection region

The influence of the Plata River discharge on the western South Atlantic shelf

MatanoRicardoCEOASSalinitySignatureCross.pdf

MatanoRicardoCEOASSalinitySignatureCross_SupportingInformation.pdf

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