Modeling the Role of Solar Variability in Late Pleistocene Millennial-Scale Climate Oscillations
模拟太阳变率在晚更新世千年尺度气候振荡中的作用
基本信息
- 批准号:0317719
- 负责人:
- 金额:$ 20.63万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2003
- 资助国家:美国
- 起止时间:2003-07-15 至 2004-05-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The objective of this award is to test the hypothesis that solar variability forced tropical climate change during the last glaciation. A strong correlation between millennial scale Holocene solar variability and North Atlantic sea-ice drift proxies has been found. Previous modeling studies indicate that the North Atlantic region is unlikely to force rapid tropical climate change. In contrast, a preliminary climate simulation of the last glaciation indicates that tropical climate is sensitive to changes in solar irradiance. It is hypothesized that solar-driven tropical climate change may have driven rapid extra-tropical climate oscillations. The strength of this hypothesis is that it explains both tropical and extra-tropical glacial marine proxy data with a known forcing. This award will support a series of late Pleistocene (Marine Isotope Stage 3) coupled ocean-atmosphere-sea-ice experiments using NCAR 's paleo-climate system model to test this hypothesis. After establishing an equilibrium control experiment, a series of branch runs forced by plausible changes in solar irradiance will be completed. The experiments will be compared and time series of important climate fields will be analyzed to identify the response of the climate to solar forcing. Because of the potentially important role for tropical water vapor transports to influence glacial climate, the passive tracer capabilities of Community Atmospheric Model (CAM) 2.0, will be implemented to determine the pathways and fluxes of water vapor from the tropical oceans. In order to identify climate linkages between tropical and extra-tropical regions, a second series of experiments will be conducted with the imposed solar forcing restricted to specific regions (e.g., the tropics). In this way, it will be possible to distinguish the direct climate response to solar variability from the indirect response resulting from dynamical changes. Finally, model results will be compared with existing records of climate change. This research should provide helpful insight into tropical - extra-tropical linkages in climate.
该奖项的目的是检验太阳变率在末次冰期强迫热带气候变化的假设。全新世千禧年尺度的太阳变率与北大西洋海冰漂移具有很强的相关性。以前的模拟研究表明,北大西洋地区不太可能迫使热带气候迅速变化。相反,末次冰期的初步气候模拟表明,热带气候对太阳辐照度的变化很敏感。据推测,太阳驱动的热带气候变化可能驱动了快速的热带外气候振荡。这一假设的优势在于,它解释了热带和热带外冰川海洋的已知强迫代理数据。该奖项将支持一系列晚更新世(海洋同位素阶段3)耦合海洋-大气-海冰实验,使用NCAR的古气候系统模型来验证这一假设。在建立平衡控制实验后,将完成一系列由太阳辐照度的合理变化所迫的分支运行。将对实验结果进行比较,并分析重要气候场的时间序列,以确定气候对太阳强迫的响应。由于热带水汽输送在影响冰川气候方面具有潜在的重要作用,因此将利用群落大气模式(CAM) 2.0的被动示踪能力来确定热带海洋水汽的路径和通量。为了确定热带地区和热带外地区之间的气候联系,将进行第二系列实验,将施加的太阳强迫限制在特定地区(例如热带)。这样,就有可能区分对太阳变率的直接气候响应和由动力变化引起的间接响应。最后,将模式结果与现有的气候变化记录进行比较。这项研究将有助于深入了解气候中的热带-热带外联系。
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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Christopher Poulsen其他文献
Isotopic evidence for twentieth-century weakening of the Pacific Walker circulation
二十世纪太平洋沃克环流减弱的同位素证据
- DOI:
10.1016/j.epsl.2018.12.002 - 发表时间:
2019-02 - 期刊:
- 影响因子:5.3
- 作者:
Zhongfang Liu;ZhiminJian;Christopher Poulsen;Liang Zhao - 通讯作者:
Liang Zhao
Differential cytotoxicity of long-chain bases for human oral keratinocytes, fibroblasts, dendritic and oral squamous cell carcinoma cell lines
长链碱基对人口腔角质形成细胞、成纤维细胞、树突状细胞和口腔鳞状细胞癌细胞系的差异细胞毒性
- DOI:
10.17077/etd.3rr8ftzn - 发表时间:
2014 - 期刊:
- 影响因子:4.4
- 作者:
Christopher Poulsen - 通讯作者:
Christopher Poulsen
Christopher Poulsen的其他文献
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{{ truncateString('Christopher Poulsen', 18)}}的其他基金
P2C2: Constraining the Physics that Regulate Equilibrium Climate Sensitivity through Simulation of Last Glacial Maximum (LGM) and Eocene Paleoclimates
P2C2:通过模拟末次盛冰期 (LGM) 和始新世古气候来约束调节平衡气候敏感性的物理原理
- 批准号:
2309580 - 财政年份:2022
- 资助金额:
$ 20.63万 - 项目类别:
Standard Grant
Collaborative Research: The influence of climate and tectonics on Miocene ecosystems and faunal evolution in the East African Rift, Kenya
合作研究:气候和构造对肯尼亚东非裂谷中新世生态系统和动物群进化的影响
- 批准号:
2325048 - 财政年份:2022
- 资助金额:
$ 20.63万 - 项目类别:
Continuing Grant
Collaborative Research: The influence of climate and tectonics on Miocene ecosystems and faunal evolution in the East African Rift, Kenya
合作研究:气候和构造对肯尼亚东非裂谷中新世生态系统和动物群进化的影响
- 批准号:
2020488 - 财政年份:2021
- 资助金额:
$ 20.63万 - 项目类别:
Continuing Grant
P2C2: Constraining the Physics that Regulate Equilibrium Climate Sensitivity through Simulation of Last Glacial Maximum (LGM) and Eocene Paleoclimates
P2C2:通过模拟末次盛冰期 (LGM) 和始新世古气候来约束调节平衡气候敏感性的物理原理
- 批准号:
2002397 - 财政年份:2020
- 资助金额:
$ 20.63万 - 项目类别:
Standard Grant
P2C2: Extratropical Mechanisms, Land-Surface Properties, and Seasonal Precipitation Processes on Saharan Rainfall and Simulation of the African Humid Period
P2C2:撒哈拉降雨的温带机制、地表特性和季节性降水过程以及非洲湿润期的模拟
- 批准号:
1602956 - 财政年份:2016
- 资助金额:
$ 20.63万 - 项目类别:
Standard Grant
Collaborative Research: Quantifying Paleotopography and Paleoclimate to Test Geodynamic Models in the Peruvian Andes
合作研究:量化古地形和古气候以测试秘鲁安第斯山脉的地球动力学模型
- 批准号:
1550101 - 财政年份:2016
- 资助金额:
$ 20.63万 - 项目类别:
Continuing Grant
Collaborative Research: Earth-Life Transitions: Integrated Data-Model Analysis of CO2-Climate-Vegetation Feedbacks in a Dynamic Paleo-Icehouse
合作研究:地球-生命转变:动态古冰库中二氧化碳-气候-植被反馈的综合数据模型分析
- 批准号:
1338200 - 财政年份:2014
- 资助金额:
$ 20.63万 - 项目类别:
Continuing Grant
Collaborative research: Sources and circulation of intermediate and deep waters and their role in Campanian-Maastrichtian global cooling
合作研究:中层水和深层水的来源和循环及其在坎帕尼亚-马斯特里赫特全球变冷中的作用
- 批准号:
1261443 - 财政年份:2013
- 资助金额:
$ 20.63万 - 项目类别:
Standard Grant
Collaborative Research: Linking erosional and climatic processes in regions of active mountain building
合作研究:将活跃造山地区的侵蚀和气候过程联系起来
- 批准号:
1249788 - 财政年份:2013
- 资助金额:
$ 20.63万 - 项目类别:
Continuing Grant
Collaborative Research: Recovering Surface Uplift Histories and Climate Dynamics of the Cenozoic N. American Cordillera through Integrated Climate Modeling and Isotopic Studies
合作研究:通过综合气候模拟和同位素研究恢复新生代北美洲科迪勒拉的地表隆升历史和气候动态
- 批准号:
1019420 - 财政年份:2010
- 资助金额:
$ 20.63万 - 项目类别:
Continuing Grant
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