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

被引:92
作者
Zheng, Y
van Geen, A
Anderson, RF
Gardner, JV
Dean, WE
机构
[1] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA
[2] US Geol Survey, Denver, CO 80225 USA
[3] US Geol Survey, Menlo Pk, CA 94025 USA
来源
PALEOCEANOGRAPHY | 2000年 / 15卷 / 05期
关键词
D O I
10.1029/1999PA000473
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
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.
引用
收藏
页码:528 / 536
页数:9
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