GRGC: Coll Resc: Climatic & Environmental Response of the Western Equatorial Pacific to Long & Short-Term Global Warming in the Lake Paleocene and Early Eocene
GRGC:Coll Resc:气候
基本信息
- 批准号:9406099
- 负责人:
- 金额:$ 13.47万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:1994
- 资助国家:美国
- 起止时间:1994-08-15 至 1997-07-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
9406099 Zachos This project is designed to test several hypotheses regarding climate dynamics of, and marine biotic response to, gradual and abrupt global warming in the late Paleocene and early Eocene (ie., across the Paleocene/Eocene (P/E) boundary). We have collected closely spaced sediment samples from across this boundary at two holes of site 865, atop Allison Guyot in the western equatorial Pacific Ocean. Our primary objectives are to establish late Paleocene through middle Eocene changes in tropical sea surface temperature and thermocline structure, vertical carbon isotope distributions, net productivity, bottom water redox conditions (as recorded by benthic foraminifera), and the effect of these changes on micro-organism evolution. To this end, we will reconstruct at high resolution: 1) carbon and oxygen isotope records from several species of planktonic (surface and deep dwelling) and benthic foraminifera, 2) quantitative planktonic and benthic foraminiferal assemblage records, 3) quantitative nannofossil assemblage records, and 4) an integrated chemobiostratigraphic record. Our overall intent is to develop a better understanding of the environmental dynamics of the tropical oceans during periods of rapid global warming. Our comprehensive, multi-parameter data set will be integrated in existing data sets from mid and high latitudes, alleviate the lack of data from the tropical Pacific, and help define the boundary conditions for global climate reconstructions and modeling. We will investigate the biological and chemical consequences of the largest disturbance of the global carbon cycle in the last 90 million years, and its affect on tropical climate. By defining the physical, chemical, and biological responses of the tropical ocean to the rapid global warming at the Paleocene/Eocene boundary, we can test hypotheses relating to the stability of tropical SST, and address the paradox in modeling early Eocene climate: warm high latitudes (requiring high heat transport from the low to the high latitudes), at low temperature gradients and low overall wind speeds (thus no mechanism for the high heat transport).
9406099 Zachos这个项目旨在测试几个关于气候动力学以及海洋生物对古新世晚期和始新世早期(即跨越古新世/始新世(P/E)界线)逐渐和突然的全球变暖的响应的假说。我们在865站点的两个洞,即赤道太平洋西部的Allison Guyot顶部,收集了跨越这一边界的紧密间隔的沉积物样本。我们的主要目标是建立晚古新世至中始新世热带海洋表面温度和温跃层结构的变化、碳同位素垂直分布、净生产力、底水氧化还原条件(由底栖有孔虫记录)以及这些变化对微生物进化的影响。为此,我们将以高分辨率重建:1)几种浮游(表层和深层)和底栖有孔虫的碳和氧同位素记录,2)定量的浮游和底栖有孔虫组合记录,3)定量的纳米化石组合记录,4)综合的化学生物地层学记录。我们的总体意图是更好地了解全球快速变暖期间热带海洋的环境动态。我们全面的多参数数据集将整合到现有的中高纬度数据集中,缓解热带太平洋数据的匮乏,并帮助定义全球气候重建和建模的边界条件。我们将调查过去9000万年来最大的全球碳循环扰动的生物和化学后果,以及它对热带气候的影响。通过定义热带海洋在古新世/始新世边界对全球快速变暖的物理、化学和生物响应,我们可以检验与热带海温稳定性有关的假设,并解决在模拟早期始新世气候时的悖论:高纬度变暖(需要从低到高纬度的高热量输送),在低温度梯度和低总风速(因此没有高热量输送的机制)。
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 Zachos其他文献
James Zachos的其他文献
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{{ truncateString('James Zachos', 18)}}的其他基金
Collaborative Research: NSFGEO-NERC: C-FORCE Carbon-Cycle Feedbacks from Response to Carbon Emissions
合作研究:NSFGEO-NERC:碳排放响应的 C-FORCE 碳循环反馈
- 批准号:
2244896 - 财政年份:2022
- 资助金额:
$ 13.47万 - 项目类别:
Standard Grant
Accomplishment Based Renewal: Intensification of the Hydrologic Cycle during the Paleocene-Eocene Thermal Maximum
基于成就的更新:古新世-始新世热最大值期间水文循环的强化
- 批准号:
2103513 - 财政年份:2021
- 资助金额:
$ 13.47万 - 项目类别:
Standard Grant
Collaborative Research: An Eocene perspective on future recovery rates of climate and ocean chemistry
合作研究:从始新世角度看待气候和海洋化学的未来恢复率
- 批准号:
1658017 - 财政年份:2017
- 资助金额:
$ 13.47万 - 项目类别:
Standard Grant
Ocean Acidification: Collaborative Research: The response of calcareous nannoplankton to ocean acidification during the Paleocene-Eocene thermal maximum
海洋酸化:合作研究:古新世-始新世热最大值期间钙质超小型浮游生物对海洋酸化的响应
- 批准号:
1415958 - 财政年份:2014
- 资助金额:
$ 13.47万 - 项目类别:
Standard Grant
Collaborative Research: Eocene Orbital-scale Oceanographic Variability in the North Atlantic: Inferences from Expedition 342 Cores
合作研究:北大西洋始新世轨道尺度海洋变化:来自 Expedition 342 核心的推论
- 批准号:
1334209 - 财政年份:2013
- 资助金额:
$ 13.47万 - 项目类别:
Standard Grant
Ocean Acidification: Collaborative Research: Establishing The Magnitude Of Sea-Surface Acidification During The Paleocene-Eocene Thermal Maximum
海洋酸化:合作研究:确定古新世-始新世热最大值期间海面酸化的程度
- 批准号:
1220615 - 财政年份:2012
- 资助金额:
$ 13.47万 - 项目类别:
Standard Grant
An Astronomically-tuned High Resolution Benthic Isotope Stratigraphy for the Late Paleocene and Early Eocene
天文调谐的古新世晚期和始新世早期高分辨率底栖同位素地层学
- 批准号:
0959117 - 财政年份:2010
- 资助金额:
$ 13.47万 - 项目类别:
Standard Grant
Collaborative Research: Reconstructing deep sea acidification during the Paleocene-Eocene Thermal Maximum
合作研究:重建古新世-始新世热最大值期间的深海酸化
- 批准号:
0903014 - 财政年份:2009
- 资助金额:
$ 13.47万 - 项目类别:
Standard Grant
Acquisition of a Gas Source Mass Spectrometer and Carbonate Preparation Device
购置气源质谱仪和碳酸盐制备装置
- 批准号:
0824978 - 财政年份:2008
- 资助金额:
$ 13.47万 - 项目类别:
Standard Grant
Collaborative Research: Dynamics of carbon release and sequestration: Case studies of two early Eocene hyperthermals
合作研究:碳释放和封存的动力学:两次始新世早期高温的案例研究
- 批准号:
0628719 - 财政年份:2006
- 资助金额:
$ 13.47万 - 项目类别:
Standard Grant
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