Ocean sciences Intrusion of circumpolar deep water along the ...
Ocean sciences Intrusion of circumpolar deep water along the Bellingshausen Sea continental shelf EUGENE W. DOMACK
The data indicate that this portion of the Bellingshausen Sea continental shelf is dominated by intrusion of CDW which is directed by major trends in the upper slope to outer shelf bathymetry. The core of warmest temperature extends for several hundred kilometers and illustrates the apparent stability of the CDW in this area. This work was supported by National Science Foundation grant DPP 86-13565.
Geology Department Hamilton College Clinton, New York 13323
Emc SCHERE AND CHARLES MCCLENNEN Geology Department Colgate University Hamilton, New York 13346 JOHN ANDERSON
Department of Geology & Geophysics Rice University Houston, Texas 77251
During the austral summer of 1987-1988 15 oceanographic stations were occupied on the Bellingshausen Sea continental shelf from the R/V Polar Duke. Up to that time there was little information regarding the oceanographic setting of the area. One of the main objectives of the survey was to determine the extent of circumpolar deep water (CDW) across the continental shelf. Data were collected using a Seabird SBE-19 Seacat Profiler modified with a Sea Tech ST-010A transmissiometer. The temperature maximums ranged from 1.1 to 1.6 'C, indicating that CDW is found across the entire portion of the continental shelf (see figure). The lowest temperature maximum observed was 1.1 'C with most stations having a temperature maximum of around 1.2 'C. The contours of Tmax demonstrate that the core of warmest water (1.6 'C) intrudes onto the shelf from the northeast. The warm core seems to originate near a major coastward bend in the 3,000-meter depth contour. It subsequently spills over from 290-meter depths to 342-meter and 372-meter depths at CTDT stations 7, 10, and 13 respectively.
1992 REvIEW
Contour diagram of maximum temperature along a portion of the Bellingshausen Sea continental shelf. Contour interval Is ± 0.1 and depth of temperature maximum is given for stations 7, 10, and 13. The 3,000-meter depth contour is shown.
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The data indicate that this portion of the Bellingshausen Sea continental shelf is dominated by intrusion of CDW which is directed by major trends in the upper slope to outer shelf bathymetry. The core of warmest temperature extends for several hundred kilometers and illustrates the apparent stability of the CDW in this area. This work was supported by National Science Foundation grant DPP 86-13565.
Geology Department Hamilton College Clinton, New York 13323
Emc SCHERE AND CHARLES MCCLENNEN Geology Department Colgate University Hamilton, New York 13346 JOHN ANDERSON
Department of Geology & Geophysics Rice University Houston, Texas 77251
During the austral summer of 1987-1988 15 oceanographic stations were occupied on the Bellingshausen Sea continental shelf from the R/V Polar Duke. Up to that time there was little information regarding the oceanographic setting of the area. One of the main objectives of the survey was to determine the extent of circumpolar deep water (CDW) across the continental shelf. Data were collected using a Seabird SBE-19 Seacat Profiler modified with a Sea Tech ST-010A transmissiometer. The temperature maximums ranged from 1.1 to 1.6 'C, indicating that CDW is found across the entire portion of the continental shelf (see figure). The lowest temperature maximum observed was 1.1 'C with most stations having a temperature maximum of around 1.2 'C. The contours of Tmax demonstrate that the core of warmest water (1.6 'C) intrudes onto the shelf from the northeast. The warm core seems to originate near a major coastward bend in the 3,000-meter depth contour. It subsequently spills over from 290-meter depths to 342-meter and 372-meter depths at CTDT stations 7, 10, and 13 respectively.
1992 REvIEW
Contour diagram of maximum temperature along a portion of the Bellingshausen Sea continental shelf. Contour interval Is ± 0.1 and depth of temperature maximum is given for stations 7, 10, and 13. The 3,000-meter depth contour is shown.
71
