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Oceanographic data beneath South Pacific sea ice. N.B. Palmer cruise 9405, September - October 1994

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Giulivi, C. F. , Jacobs, S. S. , Gorman, E. , Sutherland, S. and Hellmer, H. (2001): Oceanographic data beneath South Pacific sea ice. N.B. Palmer cruise 9405, September - October 1994 , Technical Report LDEO-99-1, Lamont-Doherty Earth Observatory of Columbia University, Palisades, New York .
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Abstract:

This report includes the primary ocean station data collected in the Pacificsector of the Southern Ocean during cruise 9405 of the Nathaniel B. Palmer.The cruise began on 10 September 1994, in Punta Arenas, Chile and ended on16 October in Lyttleton, New Zealand (Hellmer et al. 1995). Here we describedata acquisition and reduction procedures for the vertical profiling ofconductivity - temperature - depth (CTD) and dissolved oxygen, and theprocessing of water samples for salinity, oxygen, nutrients,carbon dioxide andchlorofluorocarbons. All CTD stations were occupied in the late winter/earlyspring sea ice field, in a zonal band extending from 65-72°S (Fig. 1).Originallyintended as a winter reoccupation of the stations and track of NBP 9402 (Jacobset al. 1994; Giulivi & Jacobs 1997), the work was subsequently combined with thesecond of two cruises focusing on sea ice properties (Jeffries et al. 1995). Inaddition, the sea ice and its snow cover effectively limited this cruise to theregion north of the Antarctic continental shelf. Nevertheless, 16 deep stationssampled on cruise 9402 and on World Ocean Circulation Experiment (WOCE) lines S4and P19S were revisited. The overall project objective was to obtain the firstmodern measurements in this largely unsampled region, at its seasonal extremes,in order to better understand the large-scale stratification and circulation,and ice-ocean interactions.

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