Ventilation of the Glacial Deep Pacific Ocean

Author:

Broecker Wallace123,Barker Stephen123,Clark Elizabeth123,Hajdas Irka123,Bonani Georges123,Stott Lowell123

Affiliation:

1. Lamont-Doherty Earth Observatory of Columbia University, 61 Route 9W/Post Office Box 1000, Palisades, NY 10964, USA.

2. AMS 14C lab, ETH Hoenggerberg HPK H27 and H30, CH-8093 Zurich, Switzerland.

3. University of Southern California, 3651 Trousdale Parkway, Los Angeles, CA 90089, USA.

Abstract

Measurements of the age difference between coexisting benthic and planktic foraminifera from western equatorial Pacific deep-sea cores suggest that during peak glacial time the radiocarbon age of water at 2-kilometers depth was no greater than that of today. These results make unlikely suggestions that a slowdown in deep-ocean ventilation was responsible for a sizable fraction of the increase of the ratio of carbon-14 ( 14 C) to carbon in the atmosphere and surface ocean during glacial time. Comparison of 14 C ages for coexisting wood and planktic foraminifera from the same site suggests that the atmosphere to surface ocean 14 C to C ratio difference was not substantially different from today's.

Publisher

American Association for the Advancement of Science (AAAS)

Subject

Multidisciplinary

Reference23 articles.

1. 14 C Activity and Global Carbon Cycle Changes over the Past 50,000 Years

2. Changes in the carbon cycle during the last deglaciation as indicated by the comparison of 10Be and 14C records

3. Paleoceanography 2004 19

4. ENSO-like Forcing on Oceanic Primary Production During the Late Pleistocene

5. Alex Wiedenhoeft of the Forest Products Laboratory in Madison Wisconsin advised us that it was not possible to identify milligram-sized fragments of tropical woods; rather a hand-sized piece of wood would be required. He also commented that once waterlogged any wood would be dense enough to sink in seawater.

Cited by 86 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3