Department of Estuarine and Ocean Sciences Seminar Announcement
When: Wednesday,
April 12, 2017
12:30 PM
-
1:30 PM
Where: > See description for location
Description: The School for Marine Science and Technology
Department of Estuarine and Ocean Sciences
Seminar Announcement
"New Views of the Gulf Stream"
Robert Todd
Woods Hole Oceanographic Institution
Woods Hole, MA
Wednesday, April 12, 2017
12:30 pm - 1:30 pm
SMAST, Room 204
706 S. Rodney French Blvd., New Bedford, MA
Abstract:
Autonomous underwater gliders are conducting high-resolution surveys within the Gulf Stream along the U.S. East Coast. Sustained, autonomous surveys offer the possibility of developing high-resolution climatologies of the Gulf Stream to study temporal and along-stream variability. Coincident measurements of hydrography and velocity allow estimation of the cross-Gulf Stream potential vorticity structure, which is used to infer the susceptibility of the western boundary current to various instabilities. Glider surveys reveal two mechanisms by which energy is extracted from the Gulf Stream as it flows over the Blake Plateau, a portion of the outer continental shelf between Florida and North Carolina where bottom depths are less than 1000 m. Internal waves with vertical velocities exceeding 0.1 m/s and frequencies just below the local buoyancy frequency are routinely found over the Blake Plateau, particularly near the Charleston Bump, a prominent topographic feature. These waves are likely internal lee waves generated by the sub-inertial Gulf Stream flow over the irregular bathymetry of the outer continental shelf. Bottom mixed layers with O(100) m thickness are also frequently encountered; these thick bottom mixed layers likely form in the lee of topography due to enhanced turbulence generated by O(1) m/s near-bottom flows.
Note: Seminar will be simulcast to SMAST II, Room 325
You can view the seminar live by going to
https://echosystem.umassd.edu:8443/ess/portal/section/8d8f41cc-8165-4b4b-b3c2-f3c1c414389a
Please note: the earliest you will be able to log in is
15 minutes before the regularly scheduled time.
To view a video of an SMAST seminar (post-October 1, 2014),
go to http://www.umassd.edu/smast/newsandevents/seminarseries/
and click on a highlighted title.
For additional information, please contact Sue Silva at s1silva@umassd.edu.
Department of Estuarine and Ocean Sciences
Seminar Announcement
"New Views of the Gulf Stream"
Robert Todd
Woods Hole Oceanographic Institution
Woods Hole, MA
Wednesday, April 12, 2017
12:30 pm - 1:30 pm
SMAST, Room 204
706 S. Rodney French Blvd., New Bedford, MA
Abstract:
Autonomous underwater gliders are conducting high-resolution surveys within the Gulf Stream along the U.S. East Coast. Sustained, autonomous surveys offer the possibility of developing high-resolution climatologies of the Gulf Stream to study temporal and along-stream variability. Coincident measurements of hydrography and velocity allow estimation of the cross-Gulf Stream potential vorticity structure, which is used to infer the susceptibility of the western boundary current to various instabilities. Glider surveys reveal two mechanisms by which energy is extracted from the Gulf Stream as it flows over the Blake Plateau, a portion of the outer continental shelf between Florida and North Carolina where bottom depths are less than 1000 m. Internal waves with vertical velocities exceeding 0.1 m/s and frequencies just below the local buoyancy frequency are routinely found over the Blake Plateau, particularly near the Charleston Bump, a prominent topographic feature. These waves are likely internal lee waves generated by the sub-inertial Gulf Stream flow over the irregular bathymetry of the outer continental shelf. Bottom mixed layers with O(100) m thickness are also frequently encountered; these thick bottom mixed layers likely form in the lee of topography due to enhanced turbulence generated by O(1) m/s near-bottom flows.
Note: Seminar will be simulcast to SMAST II, Room 325
You can view the seminar live by going to
https://echosystem.umassd.edu:8443/ess/portal/section/8d8f41cc-8165-4b4b-b3c2-f3c1c414389a
Please note: the earliest you will be able to log in is
15 minutes before the regularly scheduled time.
To view a video of an SMAST seminar (post-October 1, 2014),
go to http://www.umassd.edu/smast/newsandevents/seminarseries/
and click on a highlighted title.
For additional information, please contact Sue Silva at s1silva@umassd.edu.
Contact: > See Description for contact information
Topical Areas: School for Marine Sciences and Technology, SMAST Seminar Series