Support for D.M.F. during preparation of this manuscript was provided by the National Science Foundation through Grant OCE91-14656 and by the National Oceanic and Atmospheric Administration through Subcontract 40AANE809079. W.E.J. gratefully acknowledges support from the Office of Naval Research through Contract N00014-95-1-0025 and from the National Science Foundation through Grant OCE-9730322. T.L.T. and H.E.H. were supported by the project “Dynamics of Low-Latitude Western Boundary Currents” funded by the Office of Naval Research under Program Element 61153N. Model integration was performed on a Cray C90 at the Naval Oceanographic Office, Stennis Space Center, Mississippi, a component of the Department of Defense High Performance Computing Initiative. We thank P. L. Richardson and two anonymous reviewers for comments and suggestions which improved this manuscript.
Bleck, R., and L. T. Smith, 1990: A wind-driven isopycnic coordinate model of the north and equatorial Atlantic Ocean 1: Model development and supporting experiments. J. Geophys. Res.,95, 3273–3285.
Bourles, B., R. L. Molinari, E. Johns, W. D. Wilson, and K. D. Leaman, 1999: Upper layer currents in the western tropical North Atlantic (1989–1991). J. Geophys. Res.,104, 1361–1375.
Broecker, W. S., 1991: The great ocean conveyor. Oceanography,4, 79–89.
Bruce, J. G., J. L. Kerling, and W. H. Beatty III, 1985: On the North Brazilian eddy field. Progress in Oceanography, Vol. 14, Pergamon, 57–63.
Bryan, F. O., I. Wainer, and W. R. Holland, 1995: Sensitivity of the tropical Atlantic circulation to specification of wind stress climatology. J. Geophys. Res.,100, 24 729–24 744.
Bryan, K., 1969: A numerical method for the study of the circulation of the world ocean. J. Comput. Phys.,4, 347–376.
Carton, J. A., 1992: Tropical Atlantic eddies collide with the coast of South America (abstract). Eos, Trans. Amer. Geophys. Union,72 (51), 22.
Cochrane, J. D., F. J. Kelly, and C. R. Olling, 1979: Subthermocline countercurrents in the western equatorial Atlantic Ocean. J. Phys. Oceanogr.,9, 724–738.
Didden, N., and F. Schott, 1993: Eddies in the North Brazil Current retroflection region observed by GEOSAT altimetry. J. Geophys. Res.,98, 20 121–20 131.
Düing, W., F. Ostapoff, and J. Merle, 1980: Physical Oceanography of the Tropical Atlantic duringGATE. University of Miami, 117 pp.
Fine, R. A., and R. L. Molinari, 1988: A continuous deep western boundary current between Abaco (26.5N) and Barbados (13N). Deep-Sea Res.,35, 1441–1450.
Fratantoni, D. M., 1996: On the pathways and mechanisms of upper-ocean mass transport in the tropical Atlantic Ocean. University of Miami/RSMAS Tech. Rep. RSMAS-96-006, 250 pp. [Available from Rosentiel School of Marine and Atmospheric Science, 4600 Rickenbacker Causeway, Miami, FL 33149.].
——, and P. L. Richardson, 1999: SOFAR float observations of an intermediate-depth eastern boundary current and mesoscale variability in the eastern tropical Atlantic Ocean. J. Phys. Oceanogr.,29, 1265–1278.
——, W. E. Johns, and T. L. Townsend, 1995: Rings of the North Brazil Current: Their structure and behavior inferred from observations and a numerical simulation. J. Geophys. Res.,100, 10 633–10 654.
Fu, L., 1981: The general circulation and meridional heat transport of the subtropical South Atlantic determined by inverse methods. J. Phys. Oceanogr.,11, 1171–1193.
Gordon, A. L., 1986: Interocean exchange of thermocline water. J. Geophys. Res.,91, 5037–5046.
Hallock, Z. R., J. L. Mitchell, and J. D. Thompson, 1989: Sea surface topographic variability near the New England Seamounts: An intercomparison among in-situ observations, numerical simulations, and GEOSAT altimetry from the Regional Energetics Experiments. J. Geophys. Res.,94, 8021–8028.
Heburn, G. W., 1994: The dynamics of the seasonal variability of the western Mediterranean circulation. Seasonal and interannual Variability of the Western Mediterranean Sea, P. E. La Violette, Ed., Coastal Estuarine Studies, Vol. 46, Amer. Geophys. Union, 249–285.
Hellerman, S., and M. Rosenstein, 1983: Normal monthly wind stress over the world ocean with error estimates. J. Phys. Oceanogr.,13, 1093–1104.
Hisard, P., and C. Henin, 1984: Zonal pressure gradient, velocity, and transport in the Atlantic equatorial undercurrent from FOCAL cruises (July 1982–February 1984). Geophys. Res. Lett.,11, 761–764.
Holland, W. R., and F. Bryan, 1987: Progress in the WOCE Ocean Community Modeling Effort (abstract). Eos, Trans. Amer. Geophys. Union,68, 1311.
Hurlburt, H. E., and J. D. Thompson, 1980: A numerical study of Loop Current intrusions and eddy shedding. J. Phys. Oceanogr.,10, 1611–1651.
——, and T. L. Townsend, 1994: NRL effort in the North Atlantic, data assimilation and model evaluation experiments—North Atlantic Basin: Preliminary experiment plan, Center for Ocean and Atmospheric Modeling (COAM), University of Southern Mississippi. Rep. PR-2-9S, 50 pp. [Available from University of Southern Mississippi/COAM, Stennis Space Center, MS 39529.].
——, and P. J. Hogan, 2000: Impact of 1/8° to 1/64° resolution on Gulf Stream model-data comparisons in basin-scale subtropical Atlantic Ocean models. Dyn. Atmos. Oceans, in press.
——, A. J. Wallcraft, W. J. Schmitz Jr., P. J. Hogan, and E. J. Metzger, 1996: Dynamics of the Kuroshio/Oyashio current system using eddy-resolving models of the North Pacific Ocean. J. Geophys. Res.,101, 941–976.
Johns, W. E., T. N. Lee, F. A. Schott, R. J. Zantopp, and R. H. Evans, 1990: The North Brazil Current retroflection: Seasonal structure and eddy variability. J. Geophys. Res.,95, 22 103–22 120.
——, ——, R. Beardsley, J. Candela, and B. Castro, 1998: Annual cycle and variability in the North Brazil Current. J. Phys. Oceanogr.,28, 103–128.
Jones, G. A., 1991: A stop-start ocean conveyor. Nature,341, 364–365.
Katz, E. J., 1987: Seasonal response of the sea surface to the wind in the equatorial Atlantic. J. Geophys. Res.,92, 1885–1893.
——, 1993: An interannual study of the Atlantic North Equatorial Countercurrent. J. Phys. Oceanogr.,23, 116–123.
——, and S. Garzoli, 1982: Response of the western equatorial Atlantic Ocean to an annual wind cycle. J. Mar. Res.,40, 307–329.
Larsen, J. C., and T. B. Sanford, 1985: Florida Current volume transports from voltage measurements. Science,227, 302–304.
Leaman, K. D., R. L. Molinari, and P. S. Vertes, 1987: Structure and variability of the Florida Current at 27°N: April 1982–July 1984. J. Phys. Oceanogr.,17, 565–583.
Levitus, S., 1982: Climatological Atlas of the World Ocean. NOAA Prof. Paper No. 13, U.S. Govt. Printing Office, Washington, D.C., 173 pp.
MacDonald, A. M., 1993: Property fluxes at 30°S and their implications for the Pacific–Indian throughflow and the global heat budget. J. Geophys. Res.,98, 6851–6868.
Manabe, S., and R. J. Stouffer, 1988: Two stable equilibria of a coupled ocean–atmosphere model. J. Climate,1, 841–866.
Mayer, D. A., and R. H. Weisberg, 1993: A description of COADS surface meteorological fields and the implied Sverdrup transports for the Atlantic Ocean from 30°S to 60°N. J. Phys. Oceanogr.,23, 2201–2221.
McCartney, M. S., and L. D. Talley, 1984: Warm-to-cold water conversion in the northern North Atlantic Ocean. J. Phys. Oceanogr.,14, 922–935.
——, and R. A. Curry, 1993: Trans-equatorial flow of Antarctic Bottom Water in the western Atlantic Ocean: Abyssal geostrophy at the equator. J. Phys. Oceanogr.,23, 1264–1276.
McClean, J. L., and J. M. Klinck, 1995: Description and vorticity analysis of 50-day oscillations in the western tropical region of the CME model. J. Phys. Oceanogr.,25, 2498–2517.
Mesinger, F., and A. Arakawa, 1976: Numerical methods used in atmospheric models. GARP Publ. Ser., Vol. 19, World Meteorological Organization, 64 pp.
Metcalf, W. G., 1968: Shallow currents along the northeastern coast of South America. J. Mar. Res.,26, 232–243.
——, and M. Stalcup, 1967: Origins of the Atlantic Equatorial Undercurrent. J. Geophys. Res.,72, 4959–4975.
Metzger, E. J., H. E. Hurlburt, J. C. Kindle, Z. Sirkes, and J. M. Pringle, 1992: Hindcasting of wind driven anomalies using a reduced-gravity global ocean model. Mar. Technol. Soc. J.,26 (2), 23–32.
Mittelstaedt, E., 1989: The subsurface circulation along the Moroccan slope. Poleward Flows Along Ocean Boundaries, S. J. Neshyba, C. N. M. Mooers, R. L. Smith, and R. T. Barber, Eds., Springer-Verlag, 96–109.
Molinari, R. L., and E. Johns, 1994: Upper layer temperature structure of the western tropical Atlantic. J. Geophys. Res.,99, 18 225–18 233.
Munk, W. H., 1950: On the wind-driven ocean circulation. J. Meteor.,7, 79–93.
Mysak, L. A., and G. J. Mertz, 1984: A 40- to 60-day oscillation in the source region of the Somali Current during 1976. J. Geophys. Res.,89, 711–715.
NOAA, 1986: ETOP05 digital relief of the surface of the earth. Data Announce, 86-MGG-07, National Geophysical Data Center, Washington, D.C., 2 pp.
Philander, S. G. H., and R. C. Pacanowski, 1986: The mass and heat budget in a model of the tropical Atlantic Ocean. J. Geophys. Res.,91, 14 192–14 206.
Ponte, R. M., and D. S. Gutzler, 1992: 40–60 day oscillations in the western tropical Pacific: Results from an eddy-resolving global ocean model. Geophys. Res. Lett.,19, 1475–1478.
Quadfasel, D. R., and J. C. Swallow, 1986: Evidence for 50-day period planetary waves in the South Equatorial Current of the Indian Ocean. Deep-Sea Res.,33, 1307–1312.
Richardson, P. L., and D. Walsh, 1986: Mapping climatological seasonal variations of surface currents in the tropical Atlantic using shipdrifts. J. Geophys. Res.,91, 10 537–10 550.
——, G. E. Hufford, R. Limeburner, and W. S. Brown, 1994: North Brazil Current retroflection eddies. J. Geophys. Res.,99, 5081–5093.
Rintoul, S. R., 1991: South Atlantic interbasin exchange. J. Geophys. Res.,96, 2675–2692.
Roemmich, D., 1980: Estimation of meridional heat flux in the North Atlantic by inverse methods. J. Phys. Oceanogr.,10, 1972–1983.
——, 1983: The balance of geostrophic and Ekman transports in the tropical Atlantic Ocean. J. Phys. Oceanogr.,13, 1534–1539.
Schmitz, W. J., Jr., 1996: On the interbasin-scale thermohaline circulation. Rev. Geophys.,33, 151–173.
——, and P. L. Richardson, 1991: On the sources of the Florida Current. Deep-Sea Res.,38, S389–S409.
——, and M. S. McCartney, 1993: On the North Atlantic circulation. Rev. Geophys.,31, 29–49.
Schott, F. A., and C. W. Böning, 1991: The WOCE model in the western equatorial Atlantic: Upper layer circulation. J. Geophys. Res.,96, 6993–7004.
——, L. Stramma, and J. Fischer, 1995: The warm water inflow into the western tropical Atlantic boundary regime, spring 1994. J. Geophys. Res.,100, 24 745–24 760.
Shriver, J. F., and H. E. Hurlburt, 1997: The contributions of the global thermohaline circulation to the Pacific to Indian throughflow via Indonesia. J. Geophys. Res.,102, 5491–5512.
Stalcup, M. C., and W. G. Metcalf, 1972: Current measurements in the passages of the Lesser Antilles. J. Geophys. Res.,77, 1032–1049.
Steger, J. M., and J. A. Carton, 1991: Long waves and eddies in the tropical Atlantic Ocean: 1984–1990. J. Geophys. Res.,96, 15 161–15 172.
Stommel, H., 1960: The Gulf Stream, A Physical and Dynamical Description. University of California Press, 248 pp.
Street-Perrott, F. A., and R. A. Perrott, 1990: Abrupt climate fluctuations in the tropics: The influence of Atlantic Ocean circulation. Nature,343, 607–612.
Sverdrup, H. U., 1947: Wind-driven currents in a baroclinic ocean; with application to the equatorial currents of the eastern Pacific. Proc. Natl. Acad. Sci.,33, 318–326.
——, M. W. Johnson, and R. H. Fleming, 1942: The Oceans, Their Physics, Chemistry, and General Biology, Prentice-Hall, 1087 pp.
Thompson, J. D., T. L. Townsend, A. Wallcraft, and W. J. Schmitz, 1992: Ocean prediction and the Atlantic basin: Scientific issues and technical challenges. Oceanography,5, 36–41.
Wallcraft, A. J., 1991: The Navy Layered Ocean Model users guide. NOARL Rep. 35, Naval Research Laboratory, Stennis Space Center, MS, 21 pp. [Available from NRLSSC Classified Library, Stennis Space Center, MS 39529.].
——, and D. R. Moore, 1997: The NRL layered ocean model. Parallel Compu.,23, 2227–2242.
Wilson, W. D., and W. E. Johns, 1997: Velocity structure and transport in the Windward Island Passages. Deep-Sea Res.,44(3), 487–520.
——, E. Johns, and R. L. Molinari, 1994: Upper layer circulation in the western tropical North Atlantic Ocean during August, 1989. J. Geophys. Res.,99, 22 513–22 523.
Worthington, L. V., 1976: On the North Atlantic Circulation. The Johns Hopkins Oceanographic Studies, No. 6, The Johns Hopkins University Press, 110 pp.
Wunsch, C., and B. Grant, 1982: Towards the general circulation of the North Atlantic Ocean. Progress in Oceanography, Vol. 11, Pergamon, 1–59.
Youtsey, W. J. 1993: Report detailing modifications to the 1/8° global bathymetry. Naval Research Laboratory Rep. NRL/MR/7323-93-7023, Stennis Space Center, MS, 150 pp. [Available from NRLSSC Classified Library, Stennis Space Center, MS 39529.].