AMS Radiocarbon Measurements Aimed at Improving Our Understanding of the Events Associated With the Last Glacial Termination
AMS 放射性碳测量旨在提高我们对末次冰川终止相关事件的了解
基本信息
- 批准号:8921306
- 负责人:
- 金额:$ 37.5万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:1990
- 资助国家:美国
- 起止时间:1990-09-15 至 1995-08-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
Understanding the relationship between climate change, ocean circulation and the carbon cycle is one of the greatest challenges for paleoclimatologists. The strong feedbacks between these systems result in complex interactions which make it difficult to predict the future course of climate change. Paleoclimatologic and paleoceanographic research has much to contribute to this research because, in recent geological history, large changes in each of these systems have occurred. The distribution of 14C provides one very important tracer of the past carbon cycle because its distribution and concentration is controlled by carbon cycles processes and radioactive decay. Thus it is possible to constrain the rates of change through the judicious measurement of past 14C distribution. The goal of this research is to continue the 14C age analysis of marine sediments on a variety of projects with paleoclimatic implications. The projects include: 1) studies of deep sea dissolution of calcium carbonate to determine the response of the ocean to the rapid change in atmospheric CO2 during the last deglaciation; 2) studies of the difference in 14C between surface and deep water to improve our understanding of the circulation response of the deep ocean to the last deglaciation; and 3) improvement of the deglacial chronology of both terrestrial and marine events associated with the Younger Dryas, a rapid, short-lived reversal of climatic change associated with the last deglaciation. This research is important because of its potential for enhanced understanding of the global carbon cycle.
了解气候变化、海洋环流和碳循环之间的关系是古气候学家面临的最大挑战之一。 这些系统之间的强烈反馈导致复杂的相互作用,使得预测气候变化的未来进程变得困难。 古气候学和古海洋学研究对这项研究有很大贡献,因为在最近的地质历史中,这些系统中的每一个都发生了巨大的变化。 14C的分布为过去的碳循环提供了一种非常重要的示踪剂,因为它的分布和浓度受到碳循环过程和放射性衰变的控制。 因此,可以通过明智地测量过去 14C 分布来限制变化率。 这项研究的目标是继续对各种具有古气候影响的项目进行海洋沉积物的 14C 年龄分析。 这些项目包括:1)研究深海碳酸钙溶解情况,以确定海洋对末次冰消期期间大气二氧化碳快速变化的反应; 2)研究表层水和深水14℃的差异,以提高我们对深海对末次冰消期的环流响应的认识; 3)改善与新仙女木期相关的陆地和海洋事件的冰消年表,这是与上次冰消期相关的气候变化的快速、短暂的逆转。 这项研究很重要,因为它有可能增强对全球碳循环的了解。
项目成果
期刊论文数量(0)
专著数量(0)
科研奖励数量(0)
会议论文数量(0)
专利数量(0)
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Wallace Broecker其他文献
Wallace Broecker的其他文献
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{{ truncateString('Wallace Broecker', 18)}}的其他基金
EAGER: The 17O-excess of dissolved O2 in the deep-sea: A possible tracer of Little Ice Age oceanography
EAGER:深海中溶解的 O2 过量 17O:小冰河时代海洋学的可能示踪剂
- 批准号:
1143745 - 财政年份:2011
- 资助金额:
$ 37.5万 - 项目类别:
Standard Grant
Studies Related to Establishing a Valid Radiocarbon Ventilation Rate for the Glacial Ocean
与建立冰川海洋有效放射性碳通气率相关的研究
- 批准号:
0435703 - 财政年份:2004
- 资助金额:
$ 37.5万 - 项目类别:
Continuing Grant
Reconstruction of the End Member Contributions to and Ventilation Rate of Glacial-Age Lower Atlantic Deep Water
冰期下大西洋深水端元贡献和通风率的重建
- 批准号:
0221979 - 财政年份:2002
- 资助金额:
$ 37.5万 - 项目类别:
Standard Grant
Collaborative Research: Past Deep-Sea Carbonate Ion Concentrations as Constraints on Scenarios Purporting to Explain Quaternary Atmospheric CO2 Changes
合作研究:过去的深海碳酸盐离子浓度对旨在解释第四纪大气二氧化碳变化的情景的限制
- 批准号:
0081809 - 财政年份:2000
- 资助金额:
$ 37.5万 - 项目类别:
Continuing Grant
Squeezing the Juice out of Paleoclimate Proxies
从古气候代理中榨取汁液
- 批准号:
9730546 - 财政年份:1998
- 资助金额:
$ 37.5万 - 项目类别:
Continuing Grant
AMS Radiocarbon Measurements Aimed at Improving Our Understanding of the Events Associated with the Last Glacial Termination
AMS 放射性碳测量旨在提高我们对末次冰川终止相关事件的了解
- 批准号:
9416597 - 财政年份:1995
- 资助金额:
$ 37.5万 - 项目类别:
Continuing Grant
Direct Determination of the pH Distribution in the Glacial Oceans Based on the Boron Isotope Composition of Foraminifera
基于有孔虫硼同位素组成直接测定冰川海洋 pH 值分布
- 批准号:
9402263 - 财政年份:1994
- 资助金额:
$ 37.5万 - 项目类别:
Continuing Grant
Acquisition of a Mass Spectrometric System for K/Ar Dating by the 40Ar/39Ar Method
建立 40Ar/39Ar 法 K/Ar 测年质谱系统
- 批准号:
9413834 - 财政年份:1994
- 资助金额:
$ 37.5万 - 项目类别:
Standard Grant
Osmium Isotopes as a Paleoweathering Tracer
锇同位素作为古风化示踪剂
- 批准号:
9314674 - 财政年份:1993
- 资助金额:
$ 37.5万 - 项目类别:
Continuing Grant
Collaborative Research: Rare Gases in Samoan Xenoliths
合作研究:萨摩亚捕虏体中的稀有气体
- 批准号:
9204822 - 财政年份:1992
- 资助金额:
$ 37.5万 - 项目类别:
Standard Grant
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Novel constraints on sources and sinks of methane and carbon monoxide from measurements and modelling of radiocarbon
放射性碳测量和建模对甲烷和一氧化碳源和汇的新限制
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巴芬湾海水中溶解无机碳 (DIC) 的放射性碳 (14C) 和稳定碳 (13C) 同位素测量
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MRI: Acquisition of A New Accelerator Mass Spectrometer for Radiocarbon Measurements
MRI:购买用于放射性碳测量的新型加速器质谱仪
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2018550 - 财政年份:2020
- 资助金额:
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高精度古代铁制品的放射性碳测年:测量范围从金属铁扩展到生锈的铁样品
- 批准号:
17H02017 - 财政年份:2017
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Grant-in-Aid for Scientific Research (B)
Determination of absolute ages of annual scale GCR enhancements during the Maunder Minimum based on high precision measurements of radiocarbon content in tree rings
基于对树木年轮放射性碳含量的高精度测量,确定蒙德极小期间年度规模 GCR 增强的绝对年龄
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22340144 - 财政年份:2010
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U.S.-New Zealand Planning Visit: Radiocarbon measurements of Organic Carbon in Doubtful Sound, NZ.
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0645301 - 财政年份:2006
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0223495 - 财政年份:2003
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0223381 - 财政年份:2003
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