It is a pleasure to acknowledge insightful conversations with Fiamma Straneo, Amy Bower, and Fritz Schott. The constructive comments of two anonymous reviewers are also gratefully acknowledged. The heat flux data were provided by the European Centre for Medium-Range Weather Forecasts (ECMWF) from their data server (http://www.ecmwf.int/index.html). We are also grateful to the NSF for their support of this research.
Bower, A. S., , and H. D. Hunt, 2000: Lagrangian observations of the deep western boundary current in the North Atlantic Ocean. Part II: The Gulf Stream–deep western boundary current crossover. J. Phys. Oceanogr., 30 , 784–804.
Curry, R. G., , M. S. McCartney, , and T. M. Joyce, 1998: Oceanic transport of subpolar climate signals to mid-depth subtropical waters. Nature, 391 , 575–577.
Davis, R. E., , J. T. Sherman, , and J. Dufour, 2001: Profiling ALACEs and other advances in autonomous subsurface floats. J. Atmos. Oceanic Technol., 18 , 982–993.
Dengler, M., , J. Fischer, , F. A. Schott, , and R. Zantopp, 2006: Deep Labrador Current and its variability in 1996–2005. Geophys. Res. Lett., 33 .L21S06, doi:10.1029/2006GL026702.
Dickson, R., , J. Lazier, , J. Meincke, , P. Rhines, , and J. Swift, 1996: Long-term coordinated changes in the convective activity of the North Atlantic. Prog. Oceanogr., 38 , 241–295.
Fischer, J., , and F. A. Schott, 2002: Labrador Sea Water tracked by profiling floats—From the boundary current into the open North Atlantic. J. Phys. Oceanogr., 32 , 573–584.
Fischer, J., , F. A. Schott, , and M. Dengler, 2004: Boundary circulation at the exit of the Labrador Sea. J. Phys. Oceanogr., 34 , 1548–1570.
Fratantoni, D. M., 2001: North Atlantic surface circulation during the 1990’s observed with satellite-tracked drifters. J. Geophys. Res., 106 , 22067–22093.
Katsman, C. A., , M. A. Spall, , and R. S. Pickart, 2004: Boundary current eddies and their role in the restratification of the Labrador Sea. J. Phys. Oceanogr., 34 , 1967–1983.
Kieke, D., , M. Rhein, , L. Stramma, , W. M. Smethie, , D. A. LeBel, , and W. Zenk, 2006: Changes in the CFC inventories and formation rates of upper Labrador Sea Water, 1997–2001. J. Phys. Oceanogr., 36 , 64–86.
Lavender, K. L., , R. E. Davis, , and W. B. Owens, 2000: Mid-depth recirculation observed in the interior Labrador and Irminger seas by direct velocity measurements. Nature, 407 , 66–69.
Lavender, K. L., , R. E. Davis, , and W. B. Owens, 2002: Observations of open-ocean deep convection in the Labrador Sea from subsurface floats. J. Phys. Oceanogr., 32 , 511–526.
Lavender, K. L., , W. B. Owens, , and R. E. Davis, 2005: The mid-depth circulation of the subpolar North Atlantic Ocean as measured by subsurface floats. Deep-Sea Res. I, 52 , 767–785.
Lazier, J., , R. Hendry, , A. Clarke, , I. Yashayaev, , and P. Rhines, 2002: Convection and restratification in the Labrador Sea, 1990–2000. Deep-Sea Res. I, 49 , 1819–1835.
Pickart, R. S., , and W. M. Smethie, 1998: Temporal evolution of the deep western boundary current where it enters the sub-tropical domain: Evidence from tracer data. Deep-Sea Res. I, 45 , 1053–1083.
Pickart, R. S., , and M. A. Spall, 2007: Impact of the Labrador Sea convection on the North Atlantic meridional overturning circulation. J. Phys. Oceanogr., 37 , 2207–2227.
Pickart, R. S., , W. M. J. Smethie, , J. R. N. Lazier, , E. P. Jones, , and W. J. Jenkins, 1996: Eddies of newly formed upper Labrador Sea Water. J. Geophys. Res., 101 , 20711–20726.
Pickart, R. S., , M. A. Spall, , and J. R. N. Lazier, 1997: Mid-depth ventilation in the western boundary current system of the sub-polar gyre. Deep-Sea Res. I, 44 , 1025–1054.
Pickart, R. S., , D. J. Torres, , and R. A. Clarke, 2002: Hydrography of the Labrador Sea during active convection. J. Phys. Oceanogr., 32 , 428–457.
Pickart, R. S., , M. A. Spall, , M. H. Ribergaard, , G. W. K. Moore, , and R. F. Milliff, 2003a: Deep convection in the Irminger Sea forced by the Greenland tip jet. Nature, 424 , 152–156.
Pickart, R. S., , F. Straneo, , and G. W. K. Moore, 2003b: Is Labrador Sea Water formed in the Irminger Basin? Deep-Sea Res. I, 50 , 23–52.
Renfrew, I. A., , G. W. K. Moore, , P. S. Guest, , and K. Bumke, 2002: A comparison of surface layer and surface turbulent flux observations over the Labrador Sea with ECMWF analyses and NCEP reanalyses. J. Phys. Oceanogr., 32 , 383–400.
Rhein, M., and Coauthors, 2002: Labrador Sea Water: Pathways, CFC inventory, and formation rates. J. Phys. Oceanogr., 32 , 648–665.
Schott, F. A., , J. Fischer, , M. Dengler, , and R. Zantopp, 2006: Variability of the Deep Western Boundary Current east of the Grand Banks. Geophys. Res. Lett., 33 .L21S07, doi:10.1029/2006GL026563.
Stramma, L., , D. Kieke, , M. Rhein, , F. Schott, , I. Yashayaev, , and K. P. Koltermann, 2004: Deep water changes at the western boundary of the subpolar North Atlantic during 1996 to 2001. Deep-Sea Res. I, 51 , 1033–1056.
Straneo, F., 2006b: On the connection between dense water formation, overturning, and poleward heat transport in a convective basin. J. Phys. Oceanogr., 36 , 1822–1840.
Straneo, F., , R. S. Pickart, , and K. L. Lavender, 2003: Spreading of Labrador Sea Water: An advective–diffusive study based on Lagrangian data. Deep-Sea Res. I, 50 , 701–719.
Talley, L. D., , and M. S. McCartney, 1982: Distribution and circulation of Labrador Sea Water. J. Phys. Oceanogr., 12 , 1189–1205.