Barry Ruddick - Academia.edu (original) (raw)

Papers by Barry Ruddick

Research paper thumbnail of Recover of temperature, salinity and potential density from acoustic reflectivity in the ocean

17th Ocean Sciences Meeting, 23-28 February 2014, Honolulu, Hawaii USAWe present the inversion of... more 17th Ocean Sciences Meeting, 23-28 February 2014, Honolulu, Hawaii USAWe present the inversion of temperature, salinity and potential density from time and space-coincident acoustic reflectivity and XBT data in the Gulf of Cadiz, NE Atlantic Ocean. This method recovers low frequency content ( 10 Hz) from acoustic reflectivity. Afterwards, maps of temperature and salinity are calculated from impedance using the GSW equations of state and an empirical T-S relation obtained with Neural Networks. This method allows to recover the main physical oceanographic parameters in the ocean with accuracies of δTsd = 0.1oC, δSsd = 0.09 and δρsd = 0.02kg/m3 for temperature, salinity and potential density respectively, along lateral sections of hundreds of km, covering all the full-depth water column and with vertical and lateral resolutions of 10 m and 100 m, respectively. Acoustic reflectors and inverted potential density are eventually compared to better understanding the contribution of the acoustic reflectivity to the physic observation of the oceanPeer Reviewe

Research paper thumbnail of Progress and prospects of seismic oceanography

Deep Sea Research Part I: Oceanographic Research Papers, 2021

Research paper thumbnail of Dynamics of Frontal Intrusions and Their Effects on a Mediterranean Salt Lens

Research paper thumbnail of Synthetic Modeling for an Acoustic Exploration System for Physical Oceanography

Journal of Atmospheric and Oceanic Technology, 2016

Marine multichannel seismic (MCS) data, used to obtain structural reflection images of the earth’... more Marine multichannel seismic (MCS) data, used to obtain structural reflection images of the earth’s subsurface, can also be used in physical oceanography exploration. This method provides vertical and lateral resolutions of O(10–100) m, covering the existing observational gap in oceanic exploration. All MCS data used so far in physical oceanography studies have been acquired using conventional seismic instrumentation originally designed for geological exploration. This work presents the proof of concept of an alternative MCS system that is better adapted to physical oceanography and has two goals: 1) to have an environmentally low-impact acoustic source to minimize any potential disturbance to marine life and 2) to be light and portable, thus being installed on midsize oceanographic vessels. The synthetic experiments simulate the main variables of the source, shooting, and streamer involved in the MCS technique. The proposed system utilizes a 5-s-long exponential chirp source of 208 ...

Research paper thumbnail of A practical indicator of the stability of the water column to double-diffusive activity

Deep Sea Research Part A. Oceanographic Research Papers, 1983

Research paper thumbnail of Exploration of the California Current System with seismic oceanography

Research paper thumbnail of Seismic Oceanography: A New Geophysical Tool to Investigate the Thermohaline Structure of the Oceans

Research paper thumbnail of The Mixing of Meddy “Sharon”

Small-Scale Turbulence and Mixing in the Ocean - Proceedings of the 19th International Liege Colloquium on Ocean Hydrodynamics, 1988

... Intl. J. Heat Mass Transfer 14, 57-65. Gregg,, 1980. Three-dimensional mapping of a small the... more ... Intl. J. Heat Mass Transfer 14, 57-65. Gregg,, 1980. Three-dimensional mapping of a small thermohaline intrusion. J. Phys. Oceanogr., 10, 1468-1492. Hart, JE, 1971. On sideways diffusive instability. J. Fluid Mech. 49, 279-288. Page 276. 261 Hebert, D., 1988a. ...

Research paper thumbnail of Sounding Out Ocean Fine Structure

Science, 2003

... The Fall 2000 issue of Maritimes had an article by M. Prater and HT Rossby titled “The double... more ... The Fall 2000 issue of Maritimes had an article by M. Prater and HT Rossby titled “The double irony of the Meddy.” D ... Department of Geology and Geophysics, University of Wyoming, offers a presentation about the Summer 2000 cruises on the R/V Maurice Ewing (during which ...

Research paper thumbnail of Oceanic thermohaline intrusions: theory

Progress in Oceanography, 2003

Research paper thumbnail of Oceanic double-infusion: introduction

Progress in Oceanography, 2003

Research paper thumbnail of The history and decay of a Mediterranean salt lens

Research paper thumbnail of The dilution and dispersion of ballast water discharged into Goderich Harbor

Marine Pollution Bulletin, 2011

Research paper thumbnail of Inversion of density in the ocean from seismic reflection data

The Journal of the Acoustical Society of America, 2013

Vertical stability of the fluid particles, mixing, and mesoscale motions in the ocean interior oc... more Vertical stability of the fluid particles, mixing, and mesoscale motions in the ocean interior occur mostly along-isopycnals surfaces. Therefore, potential density profiles with high lateral resolution would provide important information about the fluid dynamic and the general circulation in the ocean. Could we observe density changes from seismic data? Is seismic oceanography able to measure density with enough accuracy? How is the relation between seismic reflectors and isopycnals surfaces? We have inverted oceanic impedance from seismic data and then derived density and potential density surfaces from the oceanic impedance. Results of the inverted potential density have been compared with digitized seismic reflectors to show the relation between isopycnals and reflectors. We have also compare the seismic profiles of the GO Survey with the space-coincident CTDs and space and time-coincident XBTs to understand the nature of the reflectivity and its relation with the physical parame...

Research paper thumbnail of Shear and Convective Turbulence in a Model of Thermohaline Intrusions

Journal of Physical Oceanography, 2007

Thermohaline interleaving is an important mechanism for laterally fluxing salt, heat, and nutrien... more Thermohaline interleaving is an important mechanism for laterally fluxing salt, heat, and nutrients between water masses. Interleaving is driven by a release of potential energy resulting from the differing diffusivities of heat and salt in seawater. The flows are composed of stacked intrusions that flux more and less buoyant water in opposite directions. In this paper, the role of shear instability caused by this juxtaposed motion is investigated. The model described in Walsh and Ruddick is modified to include both the effects of shear-induced turbulence and an improved convective mixing parameterization. Shear and convective mixing play a similar and significant role in interleaving dynamics. In the absence of either instability, cross-front fluxes are increased by approximately 30%. While in situ observations of horizontal diffusivity resulting from interleaving are not yet precise enough to calibrate the parameterizations independently, parameter values based on independent labo...

Research paper thumbnail of Intrusive Mixing in a Mediterranean Salt Lens—Intrusion Slopes and Dynamical Mechanisms

Journal of Physical Oceanography, 1992

Research paper thumbnail of Two Years in the Life of a Mediterranean Salt Lens

Journal of Physical Oceanography, 1989

Research paper thumbnail of Variations in Apparent Mixing Efficiency in the North Atlantic Central Water

Journal of Physical Oceanography, 1997

Microstructure data from the North Atlantic Tracer Release Experiment (NATRE) are presented, prov... more Microstructure data from the North Atlantic Tracer Release Experiment (NATRE) are presented, providing detailed profiles of the thermal variance χ in the upper 360 m of the Canary Basin for the fall and spring seasons. The Osborn–Cox model is used to compute the ...

Research paper thumbnail of Detailed 2-D imaging of the Mediterranean outflow and meddies off W Iberia from multichannel seismic data

Journal of Marine Systems, 2010

Research paper thumbnail of Measuring lateral heat flux across a thermohaline front: A model and observational test

Journal of Marine Research, 2010

Research paper thumbnail of Recover of temperature, salinity and potential density from acoustic reflectivity in the ocean

17th Ocean Sciences Meeting, 23-28 February 2014, Honolulu, Hawaii USAWe present the inversion of... more 17th Ocean Sciences Meeting, 23-28 February 2014, Honolulu, Hawaii USAWe present the inversion of temperature, salinity and potential density from time and space-coincident acoustic reflectivity and XBT data in the Gulf of Cadiz, NE Atlantic Ocean. This method recovers low frequency content ( 10 Hz) from acoustic reflectivity. Afterwards, maps of temperature and salinity are calculated from impedance using the GSW equations of state and an empirical T-S relation obtained with Neural Networks. This method allows to recover the main physical oceanographic parameters in the ocean with accuracies of δTsd = 0.1oC, δSsd = 0.09 and δρsd = 0.02kg/m3 for temperature, salinity and potential density respectively, along lateral sections of hundreds of km, covering all the full-depth water column and with vertical and lateral resolutions of 10 m and 100 m, respectively. Acoustic reflectors and inverted potential density are eventually compared to better understanding the contribution of the acoustic reflectivity to the physic observation of the oceanPeer Reviewe

Research paper thumbnail of Progress and prospects of seismic oceanography

Deep Sea Research Part I: Oceanographic Research Papers, 2021

Research paper thumbnail of Dynamics of Frontal Intrusions and Their Effects on a Mediterranean Salt Lens

Research paper thumbnail of Synthetic Modeling for an Acoustic Exploration System for Physical Oceanography

Journal of Atmospheric and Oceanic Technology, 2016

Marine multichannel seismic (MCS) data, used to obtain structural reflection images of the earth’... more Marine multichannel seismic (MCS) data, used to obtain structural reflection images of the earth’s subsurface, can also be used in physical oceanography exploration. This method provides vertical and lateral resolutions of O(10–100) m, covering the existing observational gap in oceanic exploration. All MCS data used so far in physical oceanography studies have been acquired using conventional seismic instrumentation originally designed for geological exploration. This work presents the proof of concept of an alternative MCS system that is better adapted to physical oceanography and has two goals: 1) to have an environmentally low-impact acoustic source to minimize any potential disturbance to marine life and 2) to be light and portable, thus being installed on midsize oceanographic vessels. The synthetic experiments simulate the main variables of the source, shooting, and streamer involved in the MCS technique. The proposed system utilizes a 5-s-long exponential chirp source of 208 ...

Research paper thumbnail of A practical indicator of the stability of the water column to double-diffusive activity

Deep Sea Research Part A. Oceanographic Research Papers, 1983

Research paper thumbnail of Exploration of the California Current System with seismic oceanography

Research paper thumbnail of Seismic Oceanography: A New Geophysical Tool to Investigate the Thermohaline Structure of the Oceans

Research paper thumbnail of The Mixing of Meddy “Sharon”

Small-Scale Turbulence and Mixing in the Ocean - Proceedings of the 19th International Liege Colloquium on Ocean Hydrodynamics, 1988

... Intl. J. Heat Mass Transfer 14, 57-65. Gregg,, 1980. Three-dimensional mapping of a small the... more ... Intl. J. Heat Mass Transfer 14, 57-65. Gregg,, 1980. Three-dimensional mapping of a small thermohaline intrusion. J. Phys. Oceanogr., 10, 1468-1492. Hart, JE, 1971. On sideways diffusive instability. J. Fluid Mech. 49, 279-288. Page 276. 261 Hebert, D., 1988a. ...

Research paper thumbnail of Sounding Out Ocean Fine Structure

Science, 2003

... The Fall 2000 issue of Maritimes had an article by M. Prater and HT Rossby titled “The double... more ... The Fall 2000 issue of Maritimes had an article by M. Prater and HT Rossby titled “The double irony of the Meddy.” D ... Department of Geology and Geophysics, University of Wyoming, offers a presentation about the Summer 2000 cruises on the R/V Maurice Ewing (during which ...

Research paper thumbnail of Oceanic thermohaline intrusions: theory

Progress in Oceanography, 2003

Research paper thumbnail of Oceanic double-infusion: introduction

Progress in Oceanography, 2003

Research paper thumbnail of The history and decay of a Mediterranean salt lens

Research paper thumbnail of The dilution and dispersion of ballast water discharged into Goderich Harbor

Marine Pollution Bulletin, 2011

Research paper thumbnail of Inversion of density in the ocean from seismic reflection data

The Journal of the Acoustical Society of America, 2013

Vertical stability of the fluid particles, mixing, and mesoscale motions in the ocean interior oc... more Vertical stability of the fluid particles, mixing, and mesoscale motions in the ocean interior occur mostly along-isopycnals surfaces. Therefore, potential density profiles with high lateral resolution would provide important information about the fluid dynamic and the general circulation in the ocean. Could we observe density changes from seismic data? Is seismic oceanography able to measure density with enough accuracy? How is the relation between seismic reflectors and isopycnals surfaces? We have inverted oceanic impedance from seismic data and then derived density and potential density surfaces from the oceanic impedance. Results of the inverted potential density have been compared with digitized seismic reflectors to show the relation between isopycnals and reflectors. We have also compare the seismic profiles of the GO Survey with the space-coincident CTDs and space and time-coincident XBTs to understand the nature of the reflectivity and its relation with the physical parame...

Research paper thumbnail of Shear and Convective Turbulence in a Model of Thermohaline Intrusions

Journal of Physical Oceanography, 2007

Thermohaline interleaving is an important mechanism for laterally fluxing salt, heat, and nutrien... more Thermohaline interleaving is an important mechanism for laterally fluxing salt, heat, and nutrients between water masses. Interleaving is driven by a release of potential energy resulting from the differing diffusivities of heat and salt in seawater. The flows are composed of stacked intrusions that flux more and less buoyant water in opposite directions. In this paper, the role of shear instability caused by this juxtaposed motion is investigated. The model described in Walsh and Ruddick is modified to include both the effects of shear-induced turbulence and an improved convective mixing parameterization. Shear and convective mixing play a similar and significant role in interleaving dynamics. In the absence of either instability, cross-front fluxes are increased by approximately 30%. While in situ observations of horizontal diffusivity resulting from interleaving are not yet precise enough to calibrate the parameterizations independently, parameter values based on independent labo...

Research paper thumbnail of Intrusive Mixing in a Mediterranean Salt Lens—Intrusion Slopes and Dynamical Mechanisms

Journal of Physical Oceanography, 1992

Research paper thumbnail of Two Years in the Life of a Mediterranean Salt Lens

Journal of Physical Oceanography, 1989

Research paper thumbnail of Variations in Apparent Mixing Efficiency in the North Atlantic Central Water

Journal of Physical Oceanography, 1997

Microstructure data from the North Atlantic Tracer Release Experiment (NATRE) are presented, prov... more Microstructure data from the North Atlantic Tracer Release Experiment (NATRE) are presented, providing detailed profiles of the thermal variance χ in the upper 360 m of the Canary Basin for the fall and spring seasons. The Osborn–Cox model is used to compute the ...

Research paper thumbnail of Detailed 2-D imaging of the Mediterranean outflow and meddies off W Iberia from multichannel seismic data

Journal of Marine Systems, 2010

Research paper thumbnail of Measuring lateral heat flux across a thermohaline front: A model and observational test

Journal of Marine Research, 2010