Department of Estuarine and Ocean Sciences-MS Thesis Defense-Kathryn Tremblay
When: Wednesday,
August 28, 2019
10:30 AM
-
11:30 AM
Where: > See description for location
Description: The School for Marine Science and Technology
Department of Estuarine and Ocean Sciences
MS Thesis Defense
"Hypoxia and Upselling on the Northern New Jersey Coast"
by
Kathryn Noel Tremblay
Advisor
Wendell Brown
SMAST, University of Massachusetts Dartmouth
Committee
James Bisagni, SMAST, University of Massachusetts Dartmouth
Josh Kohut, Rugers University
Steven Lentz, Woods Hole Oceanographic Institution
Wednesday, August 28, 2019
10:30 am
SMAST East, Rooms 101/102
836 S. Rodney French Blvd, New Bedford
Abstract:
Historical evidence shows that areas of hypoxia are co-located with upwelling events along the New Jersey (NJ) coast during summer. These events, which tend to occur near bathymetric highs within 30 km of the coast, are known to be forced by sustained northward winds that drive the Ekman transport of coastal waters seaward. The observed hypoxia is a condition in which dissolved oxygen levels have dropped below 5.0 mg/L based on criteria set by New Jersey Water Quality Standards. Since 2011, Slocum glider AUVs (autonomous underwater vehicle) have been used to measure the dissolved oxygen (DO) and other water properties along the NJ coast during summer. Here we use the September 2013 glider RU28 data, buoy-winds, satellite sea surface temperatures (SST), and high frequency (HF) radar-derived surface currents to assess the potential for upwelling and hypoxia along the northern New Jersey coast. The sub-surface measurements from the glider, which zig-zagged along most of the NJ coast, measured the lowest temperature and dissolved oxygen in our northern study region. We find that a sustained northward wind during September is accompanied by surface ocean temperature decreases indicating upwelling. Water mass analysis suggests that that near-by Mid Atlantic Bight Cold Pool water mass is just offshore in deeper water and mixing within the area of upwelling and hypoxia.
For additional information, please contact Sue Silva at s1silva@umassd.edu
Department of Estuarine and Ocean Sciences
MS Thesis Defense
"Hypoxia and Upselling on the Northern New Jersey Coast"
by
Kathryn Noel Tremblay
Advisor
Wendell Brown
SMAST, University of Massachusetts Dartmouth
Committee
James Bisagni, SMAST, University of Massachusetts Dartmouth
Josh Kohut, Rugers University
Steven Lentz, Woods Hole Oceanographic Institution
Wednesday, August 28, 2019
10:30 am
SMAST East, Rooms 101/102
836 S. Rodney French Blvd, New Bedford
Abstract:
Historical evidence shows that areas of hypoxia are co-located with upwelling events along the New Jersey (NJ) coast during summer. These events, which tend to occur near bathymetric highs within 30 km of the coast, are known to be forced by sustained northward winds that drive the Ekman transport of coastal waters seaward. The observed hypoxia is a condition in which dissolved oxygen levels have dropped below 5.0 mg/L based on criteria set by New Jersey Water Quality Standards. Since 2011, Slocum glider AUVs (autonomous underwater vehicle) have been used to measure the dissolved oxygen (DO) and other water properties along the NJ coast during summer. Here we use the September 2013 glider RU28 data, buoy-winds, satellite sea surface temperatures (SST), and high frequency (HF) radar-derived surface currents to assess the potential for upwelling and hypoxia along the northern New Jersey coast. The sub-surface measurements from the glider, which zig-zagged along most of the NJ coast, measured the lowest temperature and dissolved oxygen in our northern study region. We find that a sustained northward wind during September is accompanied by surface ocean temperature decreases indicating upwelling. Water mass analysis suggests that that near-by Mid Atlantic Bight Cold Pool water mass is just offshore in deeper water and mixing within the area of upwelling and hypoxia.
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