Tomographic observations of deep convection and the thermal evolution of the Greenland Sea Gyre, 1988-1989

Pawlowicz, Ryszard A.

doi:10.1575/1912/5573

Cited by 1 publication

(2 citation statements)

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“…In any event, ice classifications at a given point in the array region (see Figures 3d and 3e). Although this procedure is somewhat crude, a more sophisticated approach using actual ice concentrations as weighting factors gave very similar results [Pawlowicz, 1994].…”

Section: Meteorological Variablesmentioning

confidence: 88%

“…This is the simplest kind of inverse, and its application in this experiment proceeds in the usual way. Complete details are given in [Pawlowicz, 1994]. Although here we concentrate on the 6-4 path, several other paths as well as ray traces and raw acoustic data are shown by Worcester et al [1993] (slightly different parameters were used in those inverses).…”

Section: Appendix A: Tomographic Slice Inversesmentioning

confidence: 99%

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Thermal evolution of the Greenland Sea Gyre in 1988–1989

Pawlowicz¹,

Lynch²,

Owens³

et al. 1995

J. Geophys. Res.

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Slice inverses of temperature and heat content from the 1988–1989 Greenland Sea Tomography experiment and other observations, including standard conductivity‐temperature‐depth stations, moored thermistors, surface meteorological variables, and surface ice cover are combined to better understand the thermodynamics of the Greenland Sea Gyre. Thermal evolution of the gyre center seems to divide naturally into the following three periods: a preconditioning phase (November–January), during which surface salinity is increased by brine rejection from ice formation and by entrainment but in which the mixed layer deepens only slowly to a depth of some 150–200 m; a deep mixing phase (February–March) during which the surface mixed layer deepens rapidly to approximately 1500 m in the gyre center purely under the influence of local surface cooling; and a restratification phase during which the products of deep mixing are replaced by Arctic Intermediate Water flowing in from the gyre edges. The onset of the deep mixing phase occurs after ice formation in the gyre center stops, resulting in an area of open water where large heat fluxes can occur. In surrounding regions, including the Odden region to the south, ice is still being formed. To the north and west, closer to the steep topography of the continental shelf, the inverse results show significant variability due to advection, and large temperature and heat content fluctuations with a period of about 50 days are seen.

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Section: Meteorological Variablesmentioning

confidence: 88%

Section: Appendix A: Tomographic Slice Inversesmentioning

confidence: 99%