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WOCE AMS Radiocarbon I: Pacific Ocean Results (P6, P16 and P17)

Published online by Cambridge University Press:  18 July 2016

Robert M. Key ,
Paul D. Quay ,
Glenn A. Jones ,
A. P. McNichol ,
K. F. Von Reden  and
Robert J. Schneider
Robert M. Key
Affiliation:
Ocean Tracer Laboratory, Department of Geosciences, Princeton University, Princeton, New Jersey 08544 USA
Paul D. Quay
Affiliation:
Department of Oceanography, University of Washington, Seattle, Washington 98195 USA
Glenn A. Jones
Affiliation:
National Ocean Sciences AMS Facility, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543 USA
A. P. McNichol
Affiliation:
National Ocean Sciences AMS Facility, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543 USA
K. F. Von Reden
Affiliation:
National Ocean Sciences AMS Facility, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543 USA
Robert J. Schneider
Affiliation:
National Ocean Sciences AMS Facility, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543 USA
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Abstract

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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). Near-surface Δ14C values for the eastern portion of both the northern and southern subtropical gyres decreased by 25–50‰, with the change being greater in the north. Equatorial near-surface values have increased by ca. 25‰. 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‰ 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‰.

Type
14C Cycling and the Oceans
Information
Radiocarbon , Volume 38 , Issue 3 , 1996 , pp. 425 - 518
Copyright
Copyright © the Arizona Board of Regents on behalf of the University of Arizona 

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