Posts Tagged ‘physical oceanography’

Skidaway scientist Dana Savidge promoted

July 28, 2010

Skidaway Institute of Oceanography researcher Dana Savidge has been promoted to associate professor.

Dr. Dana Savidge

A physical oceanographer, Savidge joined Skidaway Institute in 2003 as an assistant professor. Savidge studies Gulf Stream variability and ocean circulation, with projects on the continental shelves of Cape Hatteras, Georgia, and Antarctica. One key component of Savidge’s research is a shore-based radar system that measures surface ocean currents as far as 125 miles off the Georgia coast.

Savidge earned her bachelor’s degree in physics from Hanover College (Indiana) and her master’s degree in geophysics from Georgia Tech. Her doctorate in marine sciences is from the University of North Carolina at Chapel Hill.

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Catherine Edwards joins Skidaway Institute

July 26, 2010

Physical oceanographer Catherine Edwards has joined the faculty of the Skidaway Institute of Oceanography as an assistant professor.

Edwards  received both her bachelor’s degree in physics and her doctorate in physical oceanography from the University of North Carolina at Chapel Hill. She recently completed a postdoctoral fellowship at Florida State University.

Edwards is a coastal physical oceanographer with research interests in shelf-scale and nearshore processes. Her work includes modeling and observing coastal tidal, wind-forced, and density driven-dynamics, as well as coastal meteorology and air-sea interaction.

Edwards’ current projects include larval transport mechanisms for fisheries in the northeast Gulf of Mexico; the interaction of high frequency winds and currents in the South Atlantic Bight and Gulf of Mexico; tide-correlated eddies near the Gulf Stream; and the processes that transport nutrients and biomass onto the shelf of the South Atlantic Bight.

Skidaway Institute receives research grant to study ocean currents

October 6, 2009

Skidaway Institute of Oceanography professor Dana Savidge has been awarded a research grant from the National Science Foundation for $207,450 to study ocean currents called Langmuir Supercells.

Dana Savidge WebLangmuir circulation cells occur during strong winds and waves, and appear as long lines of bubbles or floating material aligned with the wind on the ocean surface.

“These lines are the surface expression of currents beneath the surface,” said Savidge. “The Langmuir cells are like huge counter-rotating jelly-rolls, aligned longways with the wind, with currents spiraling from the ocean surface into the deep and back up, while also moving downwind.”

Savidge has been observing Langmuir circulation on the Georgia shelf using a custom built acoustic Doppler profiler, which uses sound waves to monitor the movement of the ocean water. When Langmuir cells reach the sea floor, the so-called ‘supercells’ can pick up sediment and organic material, transport it high up into the water and carry it long distances horizontally. While Langmuir currents have been studied for years, they have only recently been observed reaching the sea floor.

“Our measurements suggest this process may affect sediments all across Georgia’s shelf, from the shallow near-shore environments out to the shelf edge in 50 meters of water,” Savidge said.

Savidge will use the new grant to define how these cells interact with strong tides and surface heating in Georgia’s ocean waters. She will be working closely with scientists and computer modelers from Old Dominion University (Virginia) and the University of South Florida to develop ways of including these turbulent processes in models used to predict ocean circulation and horizontal transport of the material it contains.