Stratospheric and Tropical Influences on the Mid-Latitude Circulation Response to Rising Greenhouse Gases
平流层和热带对中纬度环流对温室气体上升的响应的影响
基本信息
- 批准号:1317469
- 负责人:
- 金额:$ 66.15万
- 依托单位:
- 依托单位国家:美国
- 项目类别:Standard Grant
- 财政年份:2013
- 资助国家:美国
- 起止时间:2013-08-15 至 2018-06-30
- 项目状态:已结题
- 来源:
- 关键词:
项目摘要
This project seeks to understand how increases in global-mean temperature due to rising greenhouse gas concentrations will affect the jet stream and storm tracks (the typical paths of midlatitude frontal systems) found in the midlatitudes of the Northern and Southern Hemisphere. Previous studies of global warming simulations have found that jet streams and storm tracks in both hemispheres shift towards their respective poles with rising temperature, but the dynamical mechanisms for the shifts are not well understood. Moreover, simulations from different models do not agree as to the magnitude of the shifts. One issue addressed in this project is the role of stratospheric dynamics in producing the shifts (particularly in the Northern Hemisphere), and the extent to which enhanced representation of the stratosphere (more levels in the stratosphere on the model computational grid, for instance) leads to qualitative differences in the shifts. A second issue addressed is the extent to which the jet and storm track shifts in the Southern Hemisphere are influenced by tropical processes.The broader impacts of the work come from the practical value of an improved understanding of the atmospheric circulation response to greenhouse gas-induced warming. Shifts in the jet streams and storm tracks can affect regional climate in the midlatitude, and poleward shifts may lead to widening of the dry subtropical subsidence belts. The project also seeks to understand differences in circulation change from different models, and may help to reduce uncertainty in projections of future climate change. In addition, the work will support and train a graduate student, thereby providing for the future work force in this area.
该项目旨在了解由于温室气体浓度上升而导致的全球平均温度升高将如何影响在北半球和南半球中纬度地区发现的急流和风暴路径(中纬度锋面系统的典型路径)。先前对全球变暖模拟的研究发现,随着温度的升高,两个半球的急流和风暴路径向各自的两极移动,但这种移动的动力机制尚不清楚。此外,不同模式的模拟结果对变化的大小并不一致。本项目解决的一个问题是平流层动力学在产生变化(特别是在北半球)中的作用,以及平流层的增强表示(例如,在模型计算网格上平流层中的更多水平)在多大程度上导致了变化的质的差异。研究的第二个问题是南半球的急流和风暴路径变化在多大程度上受到热带过程的影响。这项工作更广泛的影响来自于对大气环流对温室气体引起的变暖响应的更好理解的实用价值。急流和风暴路径的移动会影响中纬度地区的区域气候,而向极地移动会导致亚热带干燥沉降带的扩大。该项目还试图了解不同模式在环流变化方面的差异,并可能有助于减少对未来气候变化预测的不确定性。此外,这项工作将支持和培训研究生,从而为该领域未来的劳动力提供支持。
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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Isla Simpson其他文献
Positive Youth Development, Participation in Community Youth Development Programs, and Community Contributions of Fifth-Grade Adolescents
五年级青少年的积极青少年发展、参与社区青少年发展计划以及社区贡献
- DOI:
- 发表时间:
2005 - 期刊:
- 影响因子:0
- 作者:
R. Lerner;J. Lerner;J. Almerigi;Christina Theokas;E. Phelps;Steinunn Gestsdottir;Sophie Naudeau;H. Jeličić;A. Alberts;Lang Ma;Lisa M. Smith;Deborah L. Bobek;David Richman;Isla Simpson;E. Christiansen;A. von Eye - 通讯作者:
A. von Eye
Isla Simpson的其他文献
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{{ truncateString('Isla Simpson', 18)}}的其他基金
Sustainability: Atmospheric Physics Needs for Community Climate Modeling
可持续性:社区气候建模所需的大气物理
- 批准号:
2311376 - 财政年份:2023
- 资助金额:
$ 66.15万 - 项目类别:
Standard Grant
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