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Physical Oceanography Research Themes

Located at the confluence of the cold, fresh Labrador Current coming from the north and the warm, saline Gulf Stream coming from the south, Newfoundland is one of the most exciting places in the world for the study of oceanography. It is located at a pivotal point in the world climate system, one of the most important regions for the exchange of heat between the tropical and polar regions. Newfoundland has a growing offshore oil industry operating in a region known for severe storms and frequented by icebergs. The once great Grand Banks fishery is now in a state of collapse. All of these factors make the understanding of the oceans around Newfoundland a matter of great economic and social importance. Ocean science studies have become a focus of research at Memorial University, have grown substantially, and activities now encompass studies in experimental laboratory fluid dynamics, glacial icesheet dynamics, acoustic methods, instrument development and deployment, and global climate modeling, to name just a few. The group offers programs leading to the M.Sc. and PhD degrees.

Faculty:
Iakov Afanassiev, Entcho Demirov, Brad deYoung, James Munroe, Lev Tarasov, Len Zedel

Staff:
Jack Foley, Chris Stevenson

Graduate Students (S2012):
Taimaz Bahadory (Tarasov), Rob Briggs (Tarasov), William Fowler (Zedel), Tristan Hauser (Tarasov/ Demirov), Hakase Hayashida (Demirov), Mark Kavanagh (Tarasov), Prajvala Kurtokoti (Munroe), Kevin Le Morzadec (Tarasov), Fan Lin (Munroe), Zhaoshi Lu (Han, deYoung), Sarah Lundrigan (Demirov), Zhimin Ma (Han, deYoung), Alexandre Melanson (Tarasov/ Bell(Geography)), Ray Roche (Demirov), David Sui (Afanassiev)

Undergraduates (F2011):
Jennifer Lahey (Zedel)

Post-docs (F2011):
Andrew Keats (Tarasov)

Visiting Assistant Professors (F2011):
Ania Harlick

Acoustic Methods Oceanography

This broad area of research involves the use of ultrasound and infrasound, as well as ambient sound, to study diverse physical and ecological aspects of the oceans. Specific areas of interest would include doppler current profiling (Zedel, deYoung), ocean acoustics, (Zedel), and fisheries acoustics (Zedel).

Coastal Oceanography

This area of study encompasses the dynamics of sediment transport (Zedel), shelf circulation in the Northwest Atlantic (deYoung), dynamics of coastal embayments (deYoung, Zedel), and ocean processes associated with topography and boundary currents (Afanassiev, deYoung)

Experimental/Laboratory Oceanography


Much can be learned of physical processes in the ocean through laboratory experiments at smaller scales. Examples of this are experimental studies of oceanic and atmospheric fluid dynamics in static and rotating frames (Afanassiev), and internal waves and other stratified flows (Munroe).

Glacial Dynamics


A glacial dynamics group exists within Physical Oceanography, wherein the comprehensive modeling of the interaction of ice sheets with the rest of the Earth System is a focus of study (Tarasov). Calibration of deglacial models for the world's ice sheets, downscaling of climate (with Demirov), Earth Systems model calibration, impact of basal hydrology on Greenland ice sheet evolution, and subglacial sediment production and transport, are current topics.

Numerical/Computational Physical Oceanography


As with other areas of Physics, computational modeling of complex systems is a ubiquitous part of Physical Oceanography, and is applied to practically all areas of the discipline within the Oceanography Group. This includes not only calculations performed to augment field observations or laboratory experiments, but direct numerical simulations of geophysical flows (Afanassiev), modeling in ocean ecology (deYoung), data assimilation (Demirov), climate dynamics (Demirov, deYoung, Tarasov), and internal waves and mixing (Munroe). To support this, copious use is made of ACEnet, as well as extensive local deployments of multi-core workstations and two Beowulf compute clusters. The group has its own systems administrator (Stevenson).

Instrument Development/Practical Oceanography


Field measurements are supported by the development and deployment of instrumentation. This has taken many forms in the group, from subsea acoustic transducers (Zedel), to gliders (deYoung) to an experimental sea bottom observatory, operated from and in partnership with the Bonne Bay Marine Station. A list of equipment is maintained here. The group, through the University, operates a vessel for field work, the MV Anne S. Pierce. Indispensible in-house support of these efforts is facilitated by dedicated staff (Foley).

Rooftop Weather Station


The group also operates a weather station on the roof of the Chemistry- Physics building, which has a webpage that is also displayed in the campus Science building. Data is continually logged and accessible for research (Foley).