Browsing Radiocarbon, Volume 38, Number 3 (1996) by Authors
Large-Radiocarbon, Volume WOCE Radiocarbon Sampling in the Pacific OceanStuiver, Mine; Östlund, H. G.; Key, Robert M.; Reimer, Paula J. (Department of Geosciences, The University of Arizona, 1996-01-01)At the University of Miami Tritium Laboratory and the University of Washington Quaternary Isotope Laboraptory, more than 1000 large-volume Pacific Ocean radiocarbon samples were measured for the WOCE program. Here we present a comprehensive data set, and a brief discussion of our findings.
WOCE AMS Radiocarbon I: Pacific Ocean Results (P6, P16 and P17)Key, Robert M.; Quay, Paul D.; Jones, Glenn A.; McNichol, A. P.; Von Reden, K. F.; Schneider, Robert J. (Department of Geosciences, The University of Arizona, 1996-01-01)AMS radiocarbon results from the World Ocean Circulation Experiment in the Pacific Ocean show dramatic changes in the inventory and distribution of bomb-produced 14C since the time of the GEOSECS survey (8/73-6/74). Nearsurface 14C values for the eastern portion of both the northern and southern subtropical gyres decreased by 25-50 per mil, with the change being greater in the north. Equatorial near-surface values have increased by ca. 25 per mil. Changes in the 250-750-m depth range are dramatically different between the northern and southern basins. The intermediate and mode waters of the southern basin have increased by as much as 75 per mil since GEOSECS. Waters of similar density in the northern hemisphere are not exposed to the Southern Ocean circulation regime and are significantly less ventilated, showing maximum changes of ca. 50 per mil.
WOCE Pacific Ocean Radiocarbon ProgramKey, Robert M. (Department of Geosciences, The University of Arizona, 1996-01-01)Fieldwork for the World Ocean Circulation Experiment (WOCE) radiocarbon program was recently completed. Ca. 9000 samples were collected for analysis using both conventional beta-counting techniques and the newer AMS technique. The mean uncertainty for the beta analyses is 3 per mil; for AMS analyses, ca. 4.5 per mil degrees.