Atmospheric and Geophysical Fluid Dynamics
大气和地球物理流体动力学
基本信息
- 批准号:RGPIN-2017-04068
- 负责人:
- 金额:$ 4.23万
- 依托单位:
- 依托单位国家:加拿大
- 项目类别:Discovery Grants Program - Individual
- 财政年份:2018
- 资助国家:加拿大
- 起止时间:2018-01-01 至 2019-12-31
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
The research program is comprised of several linked components that address issues involving understanding climate-critical interactions that occur within the solid Earth and its atmosphere and oceans. Central components of the proposed research include (1) continuing development and application of the theory of Ice-Earth-Ocean interactions that describes the processes of glacial isostatic adjustment and relative sea level change. This unique contribution to the field will continue to lead to improved understanding of both the effective viscosity of the Deep Earth and of surface glaciation history, the latter required for model based reconstruction of past climates; (2) intensification of the work on the origins and nature of density stratified turbulence, work that has already led to significant advances in understanding the turbulent diffusion of mass that occurs in the global oceans. Since this diffusivity plays an important role in the mechanism whereby cold and salty (dense) water that descends to great depth at high latitudes is able to return to the surface, it is crucial to understanding the climatologically important thermohaline circulation. Proposed extensions of this work will focus upon the development of explicit models of the turbulence produced by tidally forced internal wave breaking under both modern and past conditions; (3) work on the further development of the theory of ice-age climate variability, as in the recent identification of the mechanism responsible for the previously unexplained millennium timescale Dansgaard-Oeschger oscillations that dominated climate variability between 60,000 and 30,000 years ago. These constitute an important example of the fact that climate change may occur extremely rapidly. In the next grant period this work will be extended to include complete glacial-interglacial integrations of the coupled climate system to resolve the entire sequence of rapid events that occurred between 21,000 and 10,000 years ago using boundary conditions provided by work under component (1); and (4) work directed towards understanding regional aspects of the global warming process and of the transition into this so-called Anthropocene period from the preceding millennium. Detailed regional analyses of the earlier transition from the medieval warm period into the little ice age have been produced and will be further refined using the highest resolution modern climate models available. This component of the program will also involve the application of dynamical downscaling techniques to the understanding of Anthropocene warming impacts at the regional scale that are important for the development of science based environmental policy. In this area recently published work on both the Great Lakes Basin of North America and on Western Canada will be extended to include Greenland, as well as Southeast Asia and the Tibetan Plateau. **
该研究计划由几个相互联系的组成部分组成,这些组成部分涉及理解固体地球及其大气和海洋内发生的气候关键相互作用。建议的研究的中心组成部分包括:(1)继续发展和应用冰-地-海相互作用理论,该理论描述了冰川均衡调整和相对海平面变化的过程。这一对该领域的独特贡献将继续促进对地球深部有效粘度和地表冰川历史的理解,后者是基于模型重建过去气候所必需的;(2)加强对密度分层湍流的起源和性质的研究,这项工作已经在理解全球海洋中发生的物质湍流扩散方面取得了重大进展。由于这种扩散率在高纬度地区冷盐水(稠密)下降到很深的地方能够返回表面的机制中起着重要作用,因此对于了解气候上重要的温盐环流至关重要。这项工作的拟议扩展将集中于发展现代和过去条件下潮汐强迫内波破碎所产生的湍流的显式模型;(3)进一步发展冰期气候变率理论的工作,如最近确定了以前无法解释的千年时标Dansgaard-Oeschger振荡的机制,这种振荡在60年代之间主导了气候变率,距今30,000到30,000年。这些都是气候变化可能极其迅速地发生这一事实的一个重要例子。在下一个赠款期,这项工作将扩大到包括耦合气候系统的完整冰川-间冰期整合,以利用第(1)部分工作提供的边界条件,解决21,000年至10,000年前发生的整个快速事件序列;以及(4)致力于了解全球变暖过程的区域方面,以及从上一个千年过渡到这个所谓的人类世时期的工作。对从中世纪温暖期到小冰期的早期过渡进行了详细的区域分析,并将利用现有的最高分辨率的现代气候模型进一步加以完善。该计划的这一组成部分还将涉及动态降尺度技术的应用,以了解人类世变暖在区域尺度上的影响,这对制定以科学为基础的环境政策至关重要。在这一领域,最近发表的关于北美五大湖盆地和加拿大西部的研究将扩大到包括格陵兰、东南亚和青藏高原。 **
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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Peltier, William其他文献
Understanding variability in petroleum jet fuel life cycle greenhouse gas emissions to inform aviation decarbonization.
- DOI:
10.1038/s41467-022-35392-1 - 发表时间:
2022-12-21 - 期刊:
- 影响因子:16.6
- 作者:
Jing, Liang;El-Houjeiri, Hassan M.;Monfort, Jean-Christophe;Littlefield, James;Al-Qahtani, Amjaad;Dixit, Yash;Speth, Raymond L.;Brandt, Adam R.;Masnadi, Mohammad S.;MacLean, Heather L.;Peltier, William;Gordon, Deborah;Bergerson, Joule A. - 通讯作者:
Bergerson, Joule A.
Peltier, William的其他文献
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{{ truncateString('Peltier, William', 18)}}的其他基金
Earth System Physics and Climate Dynamics
地球系统物理和气候动力学
- 批准号:
RGPIN-2022-03281 - 财政年份:2022
- 资助金额:
$ 4.23万 - 项目类别:
Discovery Grants Program - Individual
Atmospheric and Geophysical Fluid Dynamics
大气和地球物理流体动力学
- 批准号:
RGPIN-2017-04068 - 财政年份:2021
- 资助金额:
$ 4.23万 - 项目类别:
Discovery Grants Program - Individual
Atmospheric and Geophysical Fluid Dynamics
大气和地球物理流体动力学
- 批准号:
RGPIN-2017-04068 - 财政年份:2019
- 资助金额:
$ 4.23万 - 项目类别:
Discovery Grants Program - Individual
Atmospheric and Geophysical Fluid Dynamics
大气和地球物理流体动力学
- 批准号:
RGPIN-2017-04068 - 财政年份:2017
- 资助金额:
$ 4.23万 - 项目类别:
Discovery Grants Program - Individual
Climate forcing impacts upon uncertainties in boundary conditions of a repository for spent nuclear fuel caused by a re-glaciation of the Canadian shield
气候强迫对加拿大地盾再冰川造成的乏核燃料储存库边界条件不确定性的影响
- 批准号:
488594-2015 - 财政年份:2017
- 资助金额:
$ 4.23万 - 项目类别:
Collaborative Research and Development Grants
Climate forcing impacts upon uncertainties in boundary conditions of a repository for spent nuclear fuel caused by a re-glaciation of the Canadian shield
气候强迫对加拿大地盾再冰川造成的乏核燃料储存库边界条件不确定性的影响
- 批准号:
488594-2015 - 财政年份:2016
- 资助金额:
$ 4.23万 - 项目类别:
Collaborative Research and Development Grants
Atmospheric and geophysical fluid dynamics
大气和地球物理流体动力学
- 批准号:
9627-2009 - 财政年份:2016
- 资助金额:
$ 4.23万 - 项目类别:
Discovery Grants Program - Individual
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