Cenzoic Paleoceanographic and Climate Development of the Antarctic Region Based on Oceanic Sediment Sequences
基于海洋沉积序列的南极地区新生代古海洋学和气候发展
基本信息
- 批准号:9218720
- 负责人:
- 金额:$ 28.5万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Continuing Grant
- 财政年份:1993
- 资助国家:美国
- 起止时间:1993-02-15 至 1997-01-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This award supports a continuing investigation of the oxygen and carbon isotopic composition and biostratigraphy of marine sedimentary sequences from the circum-Antarctic oceans. These studies are aimed at reconstructing the paleoclimatic, paleoceanographic, and biotic evolution of the Antarctic region during the Cenozoic. Oceanographic and climatic evolution since the middle Eocene (the last 52 million years) consists largely of progressive cooling and glaciation of the polar regions and perhaps warming in the tropics. The climatic and glacial evolution of polar regions, including Antarctica, is crucial to our understanding of long term global climatic change because high latitudes are among the most sensitive regions to externally driven change. Strong feedback mechanisms involving ice albedo and bottom water formation contribute to the development of polar regions. The Cenozoic marine stratigraphic record is largely the product of this climate evolution at high latitudes and hence it is crucial to have the most complete record possible. This investigation will add to the record of proxy climate and environmental indicators by using existing Ocean Drilling Program (ODP) cores. For the Paleogene (Paleocene through Oligocene), work will focus on cores from ODP Legs 113, 119, and 120. For the Neogene (Oligocene through present), work will focus on ODP cores from low and middle latitudes in the southwest and equatorial Pacific. This work will contribute significantly to a general understanding of the role of polar regions in global climatic change. In addition, this work will contribute to our understanding of the significance of the Circum-Antarctic Current in Antarctic and global climate processes. This work is particularly relevant in addressing the important question about the stability of the marine-based ice sheet of West Antarctica.
该奖项支持继续调查环南极海洋的海洋沉积序列的氧和碳同位素组成和生物地层学。这些研究旨在重建南极地区新生代的古气候、古海洋和生物演化。始新世中期(过去的5200万年)以来的海洋和气候演变主要包括极地地区的逐渐冷却和冰川作用,可能还有热带地区的变暖。包括南极洲在内的极地地区的气候和冰川演化对于我们理解长期的全球气候变化至关重要,因为高纬度地区是对外部驱动变化最敏感的地区之一。涉及冰反照率和底水形成的强反馈机制有助于极地区域的发展。新生代海洋地层记录在很大程度上是这种高纬度气候演变的产物,因此拥有尽可能完整的记录是至关重要的。这项调查将通过使用现有的大洋钻探计划(ODP)岩芯来增加替代气候和环境指标的记录。对于古近纪(古新世至渐新世),工作重点将放在ODP113、119和120段的岩心上。对于新近纪(渐新世至今),工作重点将放在西南部和赤道太平洋中低纬度的ODP柱上。这项工作将大大有助于全面了解极地地区在全球气候变化中的作用。此外,这项工作将有助于我们理解环南极流在南极和全球气候过程中的重要意义。这项工作对于解决有关南极洲西部海洋冰盖稳定性的重要问题特别重要。
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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James Kennett其他文献
James Kennett的其他文献
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{{ truncateString('James Kennett', 18)}}的其他基金
Collaborative Research: Co-Evolution of Submillennial and Orbital Scale Climate and Ocean Behavior during the Last 700 kyrs: The Unique Santa Barbara Basin Record
合作研究:过去 700 公里亚千禧年和轨道尺度气候与海洋行为的共同演化:独特的圣巴巴拉盆地记录
- 批准号:
0825322 - 财政年份:2008
- 资助金额:
$ 28.5万 - 项目类别:
Continuing Grant
SGER: Investigations of a Likely Extraterrestrial Impact at 12.9 ka: Possible Cause of Younger Dryas Cooling, North American Mammal Mass Extinction and Demise of Clovis People
SGER:对 12.9 ka 可能发生的外星撞击的调查:新仙女木变冷、北美哺乳动物大规模灭绝和克洛维斯人灭绝的可能原因
- 批准号:
0713769 - 财政年份:2007
- 资助金额:
$ 28.5万 - 项目类别:
Standard Grant
Extending the High-Resolution Global Climate Record in Santa Barbara Basin: Evaluating Climate Change Potential
扩展圣巴巴拉盆地的高分辨率全球气候记录:评估气候变化潜力
- 批准号:
0623148 - 财政年份:2006
- 资助金额:
$ 28.5万 - 项目类别:
Standard Grant
Acquisition of an Automated Light Gas Stable Isotope Mass Spectrometer for Dedicated Carbonate Analysis (PALEOCEANOGRAPHY, EARTH SYSTEM SCIENCE, ARCHAEOLOGY AND ECOLOGY)
购买用于专用碳酸盐分析(古海洋学、地球系统科学、考古学和生态学)的自动轻气稳定同位素质谱仪
- 批准号:
0320723 - 财政年份:2003
- 资助金额:
$ 28.5万 - 项目类别:
Standard Grant
The Middle Miocene Antarctic Climate Transition: Investigating Magnitude, Phasing, and Processes Involving Cryosphere Expansion and Global Cooling
中新世南极气候转变:调查涉及冰冻圈扩张和全球变冷的幅度、阶段和过程
- 批准号:
0229898 - 财政年份:2003
- 资助金额:
$ 28.5万 - 项目类别:
Standard Grant
Abrupt Climatic Transitions: Surface To Deep-Water Response From High-Resolution Sediment Records, Santa Barbara, California
气候突变:高分辨率沉积物记录的地表到深水响应,加利福尼亚州圣巴巴拉
- 批准号:
0242041 - 财政年份:2003
- 资助金额:
$ 28.5万 - 项目类别:
Continuing Grant
Terminal Millennial Synthesis of Decadal-to-Millenial-Scale Climatic Records of the Last 80 ky
过去 80 年来十年至千年尺度气候记录的千禧年末综合
- 批准号:
9912024 - 财政年份:1999
- 资助金额:
$ 28.5万 - 项目类别:
Standard Grant
Late Quaternary Millennial-Scale Climate Variability of the Southern California Margin: Surface-Deep Water Interactions
南加州边缘晚第四纪千禧年规模的气候变化:地表-深层水相互作用
- 批准号:
9904024 - 财政年份:1999
- 资助金额:
$ 28.5万 - 项目类别:
Continuing grant
High Resolution Studies of Late Quaternary Climate and Oceanographic Change, Santa Barbara Basin
圣巴巴拉盆地晚第四纪气候和海洋变化的高分辨率研究
- 批准号:
9509839 - 财政年份:1995
- 资助金额:
$ 28.5万 - 项目类别:
Continuing grant
Stable Isotope Stratigraphy of the Miocene Monterey Formation, California: Testing the Monterey Hypothesis
加利福尼亚州中新世蒙特利组的稳定同位素地层学:检验蒙特利假说
- 批准号:
9218738 - 财政年份:1993
- 资助金额:
$ 28.5万 - 项目类别:
Continuing grant
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