Data beneath South Pacific Sea Ice
Cruise 9405, September-October 1994
report includes the primary
ocean station data collected in the Pacific sector 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 on 16 October in Lyttleton, New Zealand (Hellmer
et al. 1995). Here we describe data acquisition and reduction
procedures for the vertical profiling of conductivity - temperature - depth
(CTD) and dissolved oxygen, and the processing of water samples for salinity,
oxygen, nutrients, carbon dioxide and chlorofluorocarbons. All CTD stations
were occupied in the late winter/early spring sea ice field, in a zonal
band extending from 65-72°S (Figure). Originally
intended as a winter reoccupation of the stations and track of NBP 9402
(Jacobs et al.
1994; Giulivi & Jacobs 1997),
the work was subsequently combined with the second of two cruises focusing
on sea ice properties (Jeffries
et al. 1995). In addition, the sea ice and its snow cover effectively
limited this cruise to the region north of the Antarctic continental shelf.
Nevertheless, 16 deep stations sampled on cruise 9402 and on World Ocean
Circulation Experiment (WOCE)
were revisited. The overall project objective was to obtain the first
modern 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.
Figure Distribution of CTD stations
taken during cruise NP9405.Closed circles indicate the locations of casts
where water samples were taken. The bottom bathymetry in meters is taken
from the Etopo-5 data set.
Giulivi, CF, SS Jacobs (1997) Oceanographic
Data in the Amundsen and Bellingshausen Seas, N.B. Palmer Cruise 9402,
February-March 1994. Tech Rep LDEO-97-3, Lamont-Doherty Earth Observatory,
Palisades, 330 pp.
HH, SS Jacobs, SW Rock, AL Belem (1995) Late winter under the South
Pacific sea ice.Ant J of the U.S., 30(5), 114-115.
HH Hellmer, P Schlosser, WM Smethie (1994) An Oceanographic expedition
to the Amundsen and Bellingshausen Seas. Antarct J of the US 29(5) 109-111.
Jeffries, MO, R Jana,
S Li, S McCullars (1995) Sea ice and snow thickness distributions in late
winter 1993 and 1994 in the Ross, Amundsen and Bellingshausen Seas.Ant
J of the US, 30 (1-4), 18-21.
The data have been archived at the National Oceanographic Data Center (NODC)
under accession number 0000481.
To obtain the data, you can use the NODC archive web site or you can contact:
firstname.lastname@example.org or email@example.com.
This research was funded by the Division of Polar Programs
of the National Science Foundation, by the Department of Energy and by
the National Oceanographic and Atmospheric Administration