The intrusion of Gulf Stream water across the continental shelf due to topographically-induced upwelling

1981 ◽  
Vol 28 (4) ◽  
pp. 393-405 ◽  
Author(s):  
J.O. Blanton ◽  
L.P. Atkinson ◽  
L.J. Pietrafesa ◽  
T.N. Lee
Author(s):  
Lu Han ◽  
Harvey Seim ◽  
John Bane ◽  
Robert E. Todd ◽  
Mike Muglia

AbstractCarbon-rich Middle Atlantic Bight (MAB) and South Atlantic Bight (SAB) shelf waters typically converge on the continental shelf near Cape Hatteras. Both are often exported to the adjacent open ocean in this region. During a survey of the region in mid-January 2018, there was no sign of shelf water export at the surface. Instead, a subsurface layer of shelf water with high chlorophyll and dissolved oxygen was observed at the edge of the Gulf Stream east of Cape Hatteras. Strong cooling over the MAB and SAB shelves in early January led to shelf waters being denser than offshore surface waters. Driven by the density gradient, the denser shelf waters cascaded beneath the Gulf Stream and were subsequently entrained into the Gulf Stream, as they were advected northeastward. Underwater glider observations 80 km downstream of the export location captured 0.44 Sv of shelf waters transported along the edge of the Gulf Stream in January 2018. In total, as much as 7×106 kg of carbon was exported from the continental shelf to a greater depth in the open ocean during this 5-day-long cascading event. Earlier observations of near-bottom temperature and salinity at a depth of 230 m captured several multiday episodes of shelf water at a location that was otherwise dominated by Gulf Stream water, indicating that the January 2018 cascading event was not unique. Cascading is an important, yet little-studied pathway of carbon export and sequestration at Cape Hatteras.


1992 ◽  
Vol 19 (4) ◽  
pp. 373-376 ◽  
Author(s):  
Glen Gawarkiewicz ◽  
Thomas M. Church ◽  
George W. Luther ◽  
Timothy G. Ferdelman ◽  
Michael Caruso

1996 ◽  
Vol 101 (C8) ◽  
pp. 18079-18104 ◽  
Author(s):  
Richard P. Mied ◽  
Colin Y. Shen ◽  
Thomas E. Evans ◽  
Gloria J. Lindemann

1991 ◽  
Vol 96 (C12) ◽  
pp. 22191 ◽  
Author(s):  
Thomas N. Lee ◽  
James A. Yoder ◽  
Larry P. Atkinson

1985 ◽  
Vol 90 (C2) ◽  
pp. 3199 ◽  
Author(s):  
Li Li ◽  
Mark Wimbush ◽  
D. Randolph Watts ◽  
Alex J. Brincko ◽  
Thomas N. Lee

2019 ◽  
Vol 6 ◽  
Author(s):  
Adrienne Hoarfrost ◽  
John Paul Balmonte ◽  
Sherif Ghobrial ◽  
Kai Ziervogel ◽  
John Bane ◽  
...  

1978 ◽  
Vol 5 (6) ◽  
pp. 495-498 ◽  
Author(s):  
Jackson O. Blanton ◽  
Leonard J. Pietrafesa

1989 ◽  
Vol 94 (C8) ◽  
pp. 10715 ◽  
Author(s):  
Thomas N. Lee ◽  
Elizabeth Williams ◽  
John Wang ◽  
Robert Evans ◽  
Larry Atkinson

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