November 21: Dr. Sung Yong Kim, Scripps Institution of Oceanography, UCSD: A multi-year analysis of surface currents derived from the high-frequency radar network off the U.S. West Coast
November 15: Amy MacFadyen, NOAA Office of Response and Restoration, Seattle, WA: Use of Model Fields for Trajectory Predictions at NOAA's Office of Response and Restoration
November 8: Prof. Jonathan Nash, COAS/OSU: High-frequency waves and turbulence in the Mediterranean outflow
October 27: Prof. George Haller, McGill University: Geodesic Theory of Transport Barriers POSTPONED
October 25: Prof. Roger Samelson, COAS/OSU: Musings on the use and abuse of potential vorticity
October 11: Dr. Craig Smith, École Polytechnique Fédérale de Lausanne (EPFL), Switzerland: An Intercomparison of Subgrid-scale Models for Large-Eddy Simulation of Atmospheric Drainage Flows
October 4: Dr. David Sutherland, University of Oregon: What controls ocean heat transport in Greenland's large outlet glacier-fjord systems?
September 13: Prof. Jim Moum, (COAS/OSU): Topographic interactions over a small bank on the continental shelf
September 6: Dr. Ted Durland, (COAS/OSU): Equatorial Inertia-Gravity Waves in the Pacific and the Significance of Vanishing Group Velocity
August 23: Dr. Ilana Wainer, (Instituto Oceanográfico of the University of Sao Paulo, Brazil): Southern Ocean and Climate
July 26: Bill Smyth: The diurnal cycle of shear instability in the Equatorial Pacific
May 31: Andreas Schmittner: Effects of Mountains and Ice Sheets on Global Ocean Circulation
May 24: Jim Lerczak: Modeling the Circulation in Shallow Estuaries and Tidal Flats
May 17: Natalie Perlin: Atmospheric circulation around a coastal cape demystified: regional modeling study
May 9: Catalina Aguirre, (Department of Geophysics, University of Chile): Seasonal dynamics of the alongshore flow off central Chile
April 26: Caspar Ammann: Bridging Global Dynamics to Local Processes: A path towards improving regional climate projections
April 19: Dan Feldman, (UC Berkeley): Using Observing System Simulation Experiments to Guide the Next Generation of NASA Earth-Observing Satellite Instrumentation
April 12: Guillermo Baigorria, (University of Florida): Application and development of climate models to investigate interactions between climate change/variability and decision makers
April 11: Emily Shroyer (WHOI): Transformation of the Alaskan coastal current in Barrow Canyon
April 5: Melanie Fewings (University of California, Santa Barbara): From Coastal Upwelling Systems to Coral Reef Islands: Using Remote Sensing and In-Situ Observations to Study Physical Controls on Ecosystems
March 29: Fabrice Veron (U. Delaware): Air-flow separation and spray generation above short and steep waves at high wind speeds
March 17: Rafael Soutelino: New findings on the Brazil Current structure at its formation region
March 8: Emlyn Jones: Addressing uncertainty and error in coastal hydrodynamic and marine biogeochemical models
March 1 (POA/Biological Oceanography): Clara Llebot: Interactions between the physical forcing, water circulation and phytoplankton dynamics in a microtidal estuary
February 22 (POA/MG&G): Peter Winsor (University of Alaska): Mega Floods and Abrupt Climate Change - Rethinking the Role of Freshwater POSTPONED
February 21 (POA/MG&G): Seung-Buhm Woo (UW): An Introduction of macro tidal Gyunggi-bay (Korea) and its facing problems: tidal flat vs tidal power
February 17: Richard Somerville (Scripps, UCSD): Evaluating a New Global Climate Model with Superparameterized Clouds
February 8: Alexander Kurapov, Peng Yu: Data assimilation component of the real-time Oregon coastal ocean forecast system
February 1: John Osborne: Spatial and temporal variability of M2 internal tide generation and propagation on the Oregon shelf
January 25: Simon de Szoeke: Surface radiative effects of Chilean marine stratocumulus clouds
January 18: Vincent Combes: Upwelling and cross-shelf transport dynamics along the Pacific Eastern Boundary
January 11: Brad Weir: A vortex-force analysis of the interaction of rip currents and surface gravity waves
January 4: Ricardo Matano: On the Upstream Spreading of Bottom Trapped Plumes
February 4: Physical Oceanography Seminar. Meghan Cronin, NOAA Pacific Marine Environmental Laboratory, Seattle, WA: Near-Surface Shear Flow in the Tropical Pacific Cold Tongue Front.
February 11: Atmospheric Science/Physical Oceanography Seminar. Natalie Perlin, COAS: Atmospheric Circulation around a Coastal Cape and Air-Sea Coupling during Summertime Upwelling: A Regional Modeling Study.
February 18: Physical Oceanography Seminar. Nathan Paldor, Fredy and Nadine Herrmann Institute of Earth Sciences, The Hebrew University of Jerusalem: Non-Harmonic Waves in Mid-Latitudes on the Rotating Spherical Earth.
February 19: Joint Physical/Biological Oceanography Seminar. Meric Srokosz, National Oceanography Centre, Southampton, UK: Do Plankton All Dance to the Same Rhythm? Synchronization Theory and Plankton Patchiness.
March 2: Physical Oceanography Seminar. Eric D. Barton, Instituto Investigaciones Marinas (CSIC), Vigo, Spain: Title TBA.
March 4: Physical Oceanography Seminar. Vitalii A. Sheremet, Graduate School of Oceanography, University of Rhode Island: Simple Current Meter Based on Drag Principle with Examples of Coastal Applications.
April 27: Physical Oceanography Seminar. Sally Warner, School of Oceanography, Univ. of Washington: Towards an Understanding of the Form Drag at Three Tree Point.
May 4: Physical Oceanography Seminar. Alexander Kurapov, COAS: Variational Assimilation of Satellite Observations in the Coastal Ocean Model off Oregon.
May 18: Biological/Physical Oceanography Seminar. Oscar Guadayol i Roig, COAS: The Impact of Turbulence Variability on Osmotrophic Plankton.
May 25: Physical Oceanography Seminar. Thierry Penduff, Centre National de la Recherche Scientifique (CNS), Laboratoire des Ecoulements Geophysiques et Industriels (LEGI), France, and Dept. of Oceanography, Florida State University, Tallahassee, FL: Simulations of the Global Ocean Circulation from the Drakkar Model: Resolution Impacts and Intrinsic Variability.
June 8: Physical Oceanography Seminar. Andrey Koch, COAS: Near-Surface Dynamics of the Upwelling Jet Separated off Oregon.
June 29: Physical Oceanography Seminar. Jim Richman, Naval Research Laboratory: Impact of Resolution and Data Assimilation on Modeling the Gulf Stream Pathway.
September 27: Physical Oceanography Seminar. Kerry Nickols, UC Davis, Bodega Marine Laboratory: Nearshore Coastal Boundary Layers, Pattern, Potential Mechanisms, and Ecological Effects.
September 28: Physical Oceanography Seminar. Kakani Katija Young, Woods Hole Oceanographic Institution: Jellyfish as Biogenic Ocean Mixers and Models for Propulsion.
September 29: Special CIOSS/PO/AtS Seminar. Kathleen Dohan, Earth & Space Research, Seattle WA: The Present State of the OSCAR Satellite-Derived Surface Velocity Product (Ocean Surface Currents).
September 30: Physical Oceanography Seminar. Melanie Fewings, UC Santa Barbara, Marine Science Institute: Inner-Shelf Water Circulation Patterns around Point Conception and the Northern Channel Islands, California.
October 4: Physical Oceanography Seminar. Julia Mullarney, School of Earth & Environmental Sciences, Washington State University: Fronts and Vegetation Dynamics in Skagit Bay.
October 26: Physical Oceanography Seminar. Mark Denny, Hopkins Marine Station, Stanford University: Spreading the Risk: Small-Scale Body Temperature Variation among Intertidal Organisms and its Implications for Species Persistence.
November 2: Candidate for Assistant/Associate Professor (Senior Research), Ocean Observatories Initiative (OOI) Associate Project Scientist Seminar. Clifton Buck, UC Santa Cruz: Aerosol Iron – Linking the Continents with the Deep Blue Sea.
November 4: Candidate for Assistant/Associate Professor (Senior Research), Ocean Observatories Initiative (OOI) Associate Project Scientist Seminar. Michael Vardaro, MBARI: Long-Term Observation of Deep Ocean Ecosystems.
November 5: Candidate for Assistant/Associate Professor (Senior Research), Ocean Observatories Initiative (OOI) Associate Project Scientist Seminar. Jonathan Fram, University of Hawaii: Measuring Exchanges on Multiple Spatial Scales: From the Golden Gate to Sand Ripples.
November 8: Candidate for Assistant/Associate Professor (Senior Research), Ocean Observatories Initiative (OOI) Associate Project Scientist Seminar. Brock Woodson, Stanford: Fronts, Winds, and Waves: Integrating Multiple Approaches to Study Coastal Marine Ecosystems.
November 9: Physical Oceanography Seminar. Miles Sundermeyer, COAS Visiting Faculty: Lateral Mixing in the Ocean: Observations and Models, Successes and Challenges.
November 30: Physical Oceanography Seminar. Jonathan Nash, COAS: A Tale of Two Tides.
December 7: Physical Oceanography Seminar. Roger Samelson, COAS: Time-Dependent Adjustment in a Simple Model of Mid-Depth Meridional Overturning.
December 21: Physical Oceanography Seminar. Jim Richman, Naval Research Laboratory, Stennis Space Center, MS: Evaluation of a Forward Tide Model in a High Resolution Global Ocean Circulation Model.
January 27: David Rivas, COAS, OSU: A numerical modeling study of the upwelling source waters along the Oregon coast during 2005
February 10: CIOSS seminar Fabian Gomez, University of Concepcion, Chile: Environmental variability and small pelagic fishes off Chile
February 26: AtS-PO seminar Dudley Chelton, COAS, OSU: A 25-Cent Empirical Coupled Model of an Idealized Eastern Boundary Current
March 24: Mattias Green, University of Bangor, UK: Tidal mixing and the strength of the Meridional overturning circulation
March 31: Special PO and Faculty Hiring Strategy Committee Seminar Series Emanuel DiLorenzo, School of Earth and Atmospheric Sciences, Georgia Institute of Technology: ENSO and the North Pacific Gyre Oscillation: a paradigm for Pacific Low-Frequency Variability
April 7: Special PO and OC 679 EBC Seminar Jane Huyer, COAS, OSU: Five Decades of Coastal Circulation Studies at OSU
April 14: Brian Arbic, Florida State University: Some recent results on global modeling of oceanic mesoscale eddies, barotropic tides, and baroclinic tides
April 21: Jim Moum, COAS, OSU: Are Tropical Instability Waves Responsible for the Equatorial Cold Tongue?
April 28: Levi Kilcher, COAS, OSU: Evolution of the Columbia River tidal plume
May 19: Andrey Koch, COAS, OSU: Modeling analysis of a separated jet in the Coastal Transition Zone off Oregon
June 2: Peng Yu, COAS, OSU: A reduced-dynamics variational approach for the assimilation of altimeter data
June 18: Yi Chao, Jet Propulsion Laboratory, California Institute of Technology & Joint Institute for Regional Earth System Science and Engineering, UCLA: A Coastal Ocean Modeling, Data Assimilation and Forecasting System
June 23: Special PO Seminar and a Precursor to the COAS 50th Anniversary Craig Biegel, Florida State University: The Oceanography of Wayne V. Burt
June 26: Jianping Gan, Department of Mathematics, Atmospheric, Marine and Coastal Environment (AMCE) Program, School of Science, Hong Kong University of Science and Technology: Intensification of upwelling and nutrient enrichment induced by widened shelf and river plume in the northeastern South China Sea
July 21: Joint PO/AtS Seminar Tracy Haack, Naval Research Laboratory, Marine Meteorology Division: Air-sea interaction and atmospheric wind forcing along the U.S. West Coast
July 28: Peter R. Oke, CSIRO Marine and Atmospheric Research, Hobart, Australia: Reanalysis of extreme oceanic events in the Tasman Sea
August 4: Andreas Schmittner, COAS, OSU: Using tracer observations to reduce the uncertainty of ocean diapycnal mixing and climate-carbon cycle projections
February 5: Joint PO/BIO Seminar Heidi Fuchs, Scripps Institution of Oceanography: Responses of snail larvae to turbulence in a tidal inlet, and implications for dispersal
February 26: Dudley Chelton, COAS, OSU: Westward energy propagation in the ocean: Rossby waves or eddies?
March 11: Dudley Chelton, COAS, OSU: Westward energy propagation in the ocean: Rossby waves or eddies?
April 2: Gregory C. Johnson, NOAA/PMEL & UW/Oceanography: Recent decadal variations in Antarctic bottom water properties
April 8: Ted Durland, COAS, OSU: Propagation of large-scale waves through narrow straits
April 29: Joint PO/BIO Seminar Oscar Schofield, Institute for Marine and Coastal Studies, Rutgers University:So you want to build an ocean observatory... A 15 year retrospective in building the Mid-Atlantic COOL room
May 20: Jonathan Nash, COAS, OSU: Turbulence and mixing in the Columbia River plume and estuary
June 3: Roger Samelson, COAS, OSU: Winds, ice, and water: the Arctic meteorology of Nares Strait
June 9:Antonio Fetter, COAS, OSU: On the Origins of the Variability of the Malvinas Current in a Global, Eddy-Permitting Numerical Simulation
Abstract:
We analyze the output of experiment 4C of the Parallel Ocean Circulation Model to study the origins of the variability of the Malvinas Current (MC) transport. First, we investigated the links between the variabilities of the MC and the Antarctic Circumpolar Current (ACC) transports at the Drake Passage. The correlation between them is relatively low (~0.45), considering the proximity of both currents. However, after high-frequency oscillations (periods shorter than 6 months) are removed the correlation increases to ~0.7. Upon crossing the Drake Passage most of the ACC transport bifurcates into two branches: the east branch, which embraces the Polar Front, and the west branch, which follows contours of planetary potential vorticity along the continental slope of South America and will form the MC. Time series analyses indicate that the connection between the transport variations of the ACC and the MC is masked by high-frequency oscillations. Although a substantial portion of the high-frequency variability that masks the connection between the ACC and the MC is produced and dissipated locally, there are also anomalies that propagate between those regions. The most conspicuous of these signals has an average speed of ~6 - 7 cm.s-1 and a period of ~150 days. To investigate the contribution of the wind forcing to the variability of the ACC and the MC, we used Principal Estimator Patterns (PEP) analysis. The results indicate that the wind stress explains a larger portion of the variance of the transport of both currents than the wind stress curl. The MC and ACC transports seem to respond to a belt of zonal wind stress anomalies in the latitudinal range of the Drake Passage that extends farther north over the South Indian Ocean. The wind forcing over the South Atlantic Ocean is unimportant to the variability of the MC transport.
June 10: Remi Tailleux, University of Reading: Energetics of turbulent stratified mixing and the ocean heat engine controversy
June 16: Renellys Perez, NOAA / Pacific Marine Environmental Laboratory: The three-dimensional structure of the tropical circulation cell in the central equatorial Pacific Ocean
June 24: Tom Farrar, Woods Hole Oceanographic Institution: Equatorial and tropical instability waves: synthesis and new observations
July 15: Jim Lerczak, COAS, OSU: Buoyancy and momentum fluxes by shoaling nonlinear internal waves
July 22: Satoshi Kimura, COAS, OSU: Modes of Instability in a Double-Diffusive Shear Layer
April 26: Sergey Frolov, NSF-STC CMOP, OHSU: What we learned from assimilative modeling of the Columbia River estuary and plume
Abstract:
With the major freshwater input on the U.S. west coast, the Columbia River (CR), through its estuary and plume, exerts strong control over the biological and physical variability off the coast of the Pacific North West. To characterize the natural variability of the CR estuary and plume and to forecast how the function of the estuary and plume may change in response to future anthropogenic and climatic forcings, CORIE is an ocean observatory for the CR estuary and plume was incepted in 1997. Data assimilative modeling is at the core of the CORIE observatory and provides reanalysis of past ocean conditions, supports scientific cruise operations through real-time analysis of ocean state, suggests improvements to the design of the observational system, and characterizes uncertainties in model predictions.
In this presentation, we first describe new algorithms that enable fast data assimilation in highly nonlinear systems like CR estuary and plume. We then apply the developed algorithms to constrain the variability of the estuary and plume. The results of our experiments suggest that the response of the ocean to episodic forcings events was different in timing and magnitude than the results of non-assimilated model suggested. Examples of such episodic events are shifts in wind regimes and events of extreme salinity intrusion in the estuary. We conclude the presentation by analyzing the long-term performance of the CORIE observational array and suggesting new array designs that will improve re-analysis of the ocean state.
September 9: David Rivas, COAS, OSU: The ventilation of the deep Gulf of Mexico
September 30: Sang-il Kim, COAS, OSU: Performance of Ensemble-based Filters for an Idealized Model of Ocean Thermohaline Circulation
October 7: Alexander Kurapov, COAS, OSU: A modeling study of combined effects of wind-driven upwelling and internal tide on the continental shelf
September 11: Martin Saraceno, COAS, OSU: Estimates of Sea Surface Height and Near Surface Alongshore Coastal Currents from Combinations of Altimeters and Tide Gauges
September 25: Emily Shroyer, COAS, OSU: Shoaling Nonlinear Internal Waves on the New Jersey Shelf
October 4: (Nearshore brownbag) Geno Pawlak, Ocean Engineering, Univ. Hawaii at Manoa: Rough Bed Boundary Layer Dynamics at the Kilo Nalu Observatory
October 24: (COAS, interdisciplinary seminar) Jack Barth, Bob Collier, and Ed Dever, COAS, OSU: An update on NSF's Ocean Observatories Initiative: Plans for the Pacific Northwest
November 2: John Grue, University of Oslo: Shear induced breaking of internal waves observed in laboratory experiments with support from fully nonlinear computations
November 6: Yonggang Liu, School of Oceanography, University of Washington: Application of the Self-Organizing Map as a Feature Extraction Technique in Oceanographic Data Analysis
November 27: Tom Farrar, Woods Hole Oceanographic Institution: Observations of the dispersion characteristics and meridional sea-level structure of equatorial waves in the Pacific Ocean
November 28: (Joint PO/ATS seminar) Tom Farrar, Woods Hole Oceanographic Institution: Oceanic mesoscale variability and atmospheric convection near 10N in the eastern Pacific