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Synthesizing the Gulf Stream Thermal Structure from XBT Data.

ADA292043

Publication Date	1994
Personal Author	Hall, M. M.
Page Count	12
Abstract	Thirty-six XBT temperature profiles have been used in a parametric model introduced by Hendry to model the Gulf Stream's thermal structure at 65 deg W between 200 and 1200 dbar. with an rms residual error of 0.56 deg C. Velocity has been computed geostrophically relative to 1200 dbar, and has been included in calculating potential vorticity analytically from the model. The resulting potential vorticity section for 65 deg W has been compared with the analogous result from Hendry's parametric model at 59 deg W, as well as observed potential vorticity sections from 68 deg to 55 deg W. There is a significant feature in the potential vorticity structure at 65 deg W not found at 59 deg W-namely, a relative minimum in potential vorticity along isopycnals, centered at the Gulf Stream's axis and 350 dbar. The modeled potential vorticity sections are consistent with the observations, including the downstream disappearance of this feature. The dynamical implications of these results are briefly discussed. (MM).
Keywords	Gulf stream Bathythermograph data Thermal properties Reprints Ocean currents Vortices Expendable Potential flow Xbt(Expendable bathythermograph) Vorticity
Source Agency	Non Paid Reprints
NTIS Subject Category	47C - Physical & Chemical Oceanography
Corporate Authors	Woods Hole Oceanographic Institution, MA.
Document Type	Journal Article
NTIS Issue Number	199520
Contract Number	N00014-87-K-0001 N00014-88-K-0612

Synthesizing the Gulf Stream Thermal Structure from XBT Data.

Synthesizing the Gulf Stream Thermal Structure from XBT Data.
ADA292043

Publication Date	1994
Personal Author	Hall, M. M.
Page Count	12
Abstract	Thirty-six XBT temperature profiles have been used in a parametric model introduced by Hendry to model the Gulf Stream's thermal structure at 65 deg W between 200 and 1200 dbar. with an rms residual error of 0.56 deg C. Velocity has been computed geostrophically relative to 1200 dbar, and has been included in calculating potential vorticity analytically from the model. The resulting potential vorticity section for 65 deg W has been compared with the analogous result from Hendry's parametric model at 59 deg W, as well as observed potential vorticity sections from 68 deg to 55 deg W. There is a significant feature in the potential vorticity structure at 65 deg W not found at 59 deg W-namely, a relative minimum in potential vorticity along isopycnals, centered at the Gulf Stream's axis and 350 dbar. The modeled potential vorticity sections are consistent with the observations, including the downstream disappearance of this feature. The dynamical implications of these results are briefly discussed. (MM).
Keywords	Gulf stream Bathythermograph data Thermal properties Reprints Ocean currents Vortices Expendable Potential flow Xbt(Expendable bathythermograph) Vorticity
Source Agency	Non Paid Reprints
NTIS Subject Category	47C - Physical & Chemical Oceanography
Corporate Authors	Woods Hole Oceanographic Institution, MA.
Document Type	Journal Article
NTIS Issue Number	199520
Contract Number	N00014-87-K-0001 N00014-88-K-0612