DEOS Seminar Announcement
When: Wednesday,
January 27, 2016
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
The Importance of Lateral Variability on Exchange Across the Inner Shelf
Anthony Kirincich
Associate Scientist
Woods Hole Oceanographic Institution
Wednesday, January 27, 2016
12:30 pm - 1:30 pm
SMAST, Room 204
706 S. Rodney French Blvd., New Bedford, MA
Abstract:
Evidence of across-shelf exchange due to the effects of major capes or headlands, bathymetric irregularities, or non-uniform wind fields has been found in most coastal areas. However, the relative impact of these sources of variability on exchange across the shelf have not been quantified in a systematic way. Using observations of surface currents from a high-resolution HF radar system along with dense observations of subsurface velocity and hydrography collected in the coastal ocean south of Martha's Vineyard, MA, this work describes the characteristics, occurrences and drivers of spatially variable circulation over the inner part of the continental shelf having scales of 100s of meters to 10s of kilometers. The integrated transport due to these features is quantified relative to the traditional depth-dependent wind-driven upwelling or downwelling driven exchange. In the study area, all mechanisms considered contribute to the total exchange across the shelf. Eddies alone lead to exchange equivalent to 1/3 of the wind-driven depth-dependent exchange, but in the opposite direction. The effects of density intrusions and the spatially variable mean circulation due to tidal rectification offer additional exchange on the same order as the quantified relative to traditional depth-dependent. Using Lagrangian trajectory analyses in addition to the Eulerian-based transport studies, this effort examines the implications of variations in the dominant type of exchange on coastal systems.
Note: Seminar will be simulcast to SMAST II, Room 325.
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
The Importance of Lateral Variability on Exchange Across the Inner Shelf
Anthony Kirincich
Associate Scientist
Woods Hole Oceanographic Institution
Wednesday, January 27, 2016
12:30 pm - 1:30 pm
SMAST, Room 204
706 S. Rodney French Blvd., New Bedford, MA
Abstract:
Evidence of across-shelf exchange due to the effects of major capes or headlands, bathymetric irregularities, or non-uniform wind fields has been found in most coastal areas. However, the relative impact of these sources of variability on exchange across the shelf have not been quantified in a systematic way. Using observations of surface currents from a high-resolution HF radar system along with dense observations of subsurface velocity and hydrography collected in the coastal ocean south of Martha's Vineyard, MA, this work describes the characteristics, occurrences and drivers of spatially variable circulation over the inner part of the continental shelf having scales of 100s of meters to 10s of kilometers. The integrated transport due to these features is quantified relative to the traditional depth-dependent wind-driven upwelling or downwelling driven exchange. In the study area, all mechanisms considered contribute to the total exchange across the shelf. Eddies alone lead to exchange equivalent to 1/3 of the wind-driven depth-dependent exchange, but in the opposite direction. The effects of density intrusions and the spatially variable mean circulation due to tidal rectification offer additional exchange on the same order as the quantified relative to traditional depth-dependent. Using Lagrangian trajectory analyses in addition to the Eulerian-based transport studies, this effort examines the implications of variations in the dominant type of exchange on coastal systems.
Note: Seminar will be simulcast to SMAST II, Room 325.
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