and transport on a section across the North Atlantic Current
A transect of CTD pro"les crossing the North Atlantic Current (NAC) along WOCE line ACM6 near 42.53N during August 1}7, 1993, provides geostrophic shear velocity pro"les, which were absolutely referenced using simultaneous POGO transport #oat measurements and velocity measurements from a s...
| Main Authors: | , , |
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| Other Authors: | |
| Format: | Text |
| Language: | English |
| Published: |
1999
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| Subjects: | |
| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.586.4151 http://www.po.gso.uri.edu/dynamics/NAC/DSR_Meinen1.pdf |
| Summary: | A transect of CTD pro"les crossing the North Atlantic Current (NAC) along WOCE line ACM6 near 42.53N during August 1}7, 1993, provides geostrophic shear velocity pro"les, which were absolutely referenced using simultaneous POGO transport #oat measurements and velocity measurements from a ship-mounted acoustic doppler current pro"ler (ADCP). The NAC absolute transport was 112$23]106 m3 s~1, which includes a portion of the transport of the Mann Eddy, a large permanent anticyclonic eddy commonly adjacent to the NAC. The NAC transport estimated relative to a level of no motion at the bottom would have under-estimated the true total absolute transport by 20%. A surprisingly large 58]106 m3 s~1 #owed southward just inshore of the NAC. This #ow, centered near 1500 dbars about 200 km o!shore of the shelf-break, was fairly barotropic with a peak velocity of greater than 20 cm s~1, and the water mass characteristics were of Labrador Sea Water. These absolute transport observations suggest southward recirculation inshore of the NAC at 42.53N and a stronger NAC than has |
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