Evidence for a reduction in the carbonate ion content of the deep sea during the course of the Holocene

被引:69
作者
Broecker, WS [1 ]
Clark, E
McCorkle, DC
Peng, TH
Hajdas, I
Bonani, G
机构
[1] Columbia Univ, Lamont Doherty Earth Observ, Palisades, NY 10964 USA
[2] ETH Honggerberg, Inst Theoret Phys, CH-8093 Zurich, Switzerland
[3] Woods Hole Oceanog Inst, Woods Hole, MA 02543 USA
[4] NOAA, Atlantic Oceanog & Meteorol Lab, Ocean Chem Div, Miami, FL 33149 USA
来源
PALEOCEANOGRAPHY | 1999年 / 14卷 / 06期
关键词
D O I
10.1029/1999PA900038
中图分类号
P [天文学、地球科学];
学科分类号
07 ;
摘要
The paleo carbonate ion proxy proposed by Broecker et al. [1999] is applied in a search for trends in the Holocene acidity of waters in the transition zone between North Atlantic Deep Water and Antarctic Bottom Water (AABW). A clear signal emerges that the carbonate ion content of waters in this zone declined during the past 8000 years. In order to determine whether this decline represents a strengthening of the northward penetrating tongue of low CO3= content AABW or a global reduction of CO3= measurements were made on a core from the Ontong Java Plateau in the western equatorial Pacific. Evidence for a similar decline in CO3= ion over the course of the Holocene was obtained lending support of the latter explanation. Such a drop is consistent with the recent finding by Indermuhle et al. [1999] that the CO2 content of the atmosphere (as recorded in the Taylor Dome Antarctica ice core) rose by 20-25 ppm during the past 8000 years.
引用
收藏
页码:744 / 752
页数:9
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