Intensification of the northeast Pacific oxygen minimum zone during the Bolling-Allerod warm period

Publication Type  Journal Article
Year of Publication  2000
Authors  Zheng, Y.; van Geen, A.; Anderson, R. F.; Gardner, J. V.; Dean, W. E.
Journal Title  Paleoceanography
Volume  15
Issue  5
Pages  528-536
Journal Date  Oct
ISBN Number  0883-8305
Accession Number  ISI:000089581200006
Key Words  california current system; santa-barbara basin; younger-dryas; northwestern pacific; intermediate waters; ocean circulation; climate-change; atlantic; scale; molybdenum

Although climate records from several locations around the world show nearly synchronous and abrupt changes, the nature of the inferred teleconnection is still poorly understood. On the basis of preserved laminations and molybdenum enrichments in open margin sediments we demonstrate that the oxygen content of northeast Pacific waters at 800 m depth during the Bolling-Allerod warm period (15-13 kyr) was greatly reduced. Existing oxygen isotopic records of benthic and planktonic foraminifera suggest that this was probably due to suppressed ventilation at higher latitudes of the North Pacific. Comparison with ventilation records for the North Atlantic indicates an antiphased pattern of convection relative to the North Pacific over the past 22 kyr, perhaps due to variations in water vapor transport across Central America.


358WYTimes Cited:34Cited References Count:50

URL  <Go to ISI>://000089581200006