权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Downgradient Energy Transport and the Atmospheric Circulation

降梯度能量传输和大气环流

基本信息

批准号：
2019647
负责人：
Gerard Roe
金额：
$ 72.93万
依托单位：
University of Washington
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2020
资助国家：
美国
起止时间：
2020-10-15 至 2024-09-30
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=2019647&HistoricalAwards=false
关键词：
Downgradient Energy Transport Atmospheric Circulation

项目摘要

The earth’s atmosphere operates as a heat engine, transporting energy from regions of surplus to regions of deficit. The heat transport varies remarkably smoothly with latitude despite the atmosphere having very different circulation patterns across the globe. Emerging research suggests that this heat transport appears to be well-described as a diffusive process that depends on the equator-to-pole energy contrast. If so, such a simple concept may offer a fundamental explanation for many aspects of the observed climatology and climate change (past and future). This research addresses: (i) why this conceptual model of energy transport works so well despite the highly complex atmospheric motion and (ii) the model’s ability to explain the hydrology and global distribution of temperature and atmospheric constituents of past climate states. The description of heat transport as a diffusive process is so fundamental in science that this research has the potential to significantly improve the public understanding of climate science. In addition to mentoring a young research scientist, the researchers will train a graduate student and heavily involve undergraduates in research activities.Specifically, the researchers seek to understand how the atmospheric circulation adjusts to maintain a nearly linear downgradient energy transport as the climate state changes. Using observations, they will determine how the near-linear relationship between the meridional enthalpy gradient and the atmospheric heat transport emerges as a function of space and time. Furthermore, they will perform numerical experiments that vary the dynamical transport mechanisms (e.g., changing the Earth’s rotation rate and orography) to probe the limits of the near-linear relationship. Finally, the researchers will analyze existing paleoclimate simulations, as well as carefully targeted new simulations, to evaluate how well this simple heat transport model characterizes past climates.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.

地球的大气层就像一台热力发动机，将能量从过剩的地区输送到不足的地区。尽管大气在地球仪上有非常不同的环流模式，但热量输送随纬度的变化非常平稳。新兴的研究表明，这种热传输似乎是一个很好的描述扩散过程，取决于赤道到极点的能量对比。如果是这样的话，这样一个简单的概念可能为观测到的气候学和气候变化（过去和未来）的许多方面提供基本的解释。这项研究涉及：（i）为什么这种能量传输的概念模型在大气运动高度复杂的情况下仍然运作良好;（ii）该模型解释过去气候状态的水文学和全球温度分布以及大气成分的能力。将热传输描述为扩散过程在科学中是如此重要，以至于这项研究有可能显着提高公众对气候科学的理解。除了指导一名年轻的研究科学家外，研究人员还将培训一名研究生，并让本科生大量参与研究活动。具体来说，研究人员试图了解大气环流如何随着气候状态的变化而调整，以保持近乎线性的向下梯度能量传输。利用观测结果，他们将确定对流焓梯度和大气热传输之间的近线性关系如何作为空间和时间的函数出现。此外，他们将进行数值实验，改变动态传输机制（例如，改变地球的自转速率和地形），以探测近线性关系的极限。最后，研究人员将分析现有的古气候模拟，以及仔细有针对性的新模拟，以评估如何以及这个简单的热传输模型表征过去的气候。这个奖项反映了NSF的法定使命，并已被认为是值得通过使用基金会的智力价值和更广泛的影响审查标准进行评估的支持。

项目成果

期刊论文数量（13）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

Stratospheric and Tropospheric Flux Contributions to the Polar Cap Energy Budgets

DOI：
10.1175/jcli-d-20-0722.1
发表时间：
2021-02
期刊：
Journal of Climate
影响因子：
4.9
作者：
C. Cardinale;B. Rose;A. Lang;A. Donohoe
通讯作者：
C. Cardinale;B. Rose;A. Lang;A. Donohoe

The large-scale, long-term coupling of temperature, hydrology, and water isotopes

温度、水文学和水同位素的大规模、长期耦合

DOI：
10.1175/jcli-d-20-0563.1
发表时间：
2021
期刊：
Journal of Climate
影响因子：
4.9
作者：
Siler, Nicholas;Bailey, Adriana;Roe, Gerard H.;Buizert, Christo;Markle, Bradley;Noone, David
通讯作者：
Noone, David

The Largest Ever Recorded Heatwave—Characteristics and Attribution of the Antarctic Heatwave of March 2022

有记录以来最大的热浪——2022 年 3 月南极热浪的特征和归因

DOI：
10.1029/2023gl104910
发表时间：
2023
期刊：
Geophysical Research Letters
影响因子：
5.2
作者：
Blanchard‐Wrigglesworth, Edward;Cox, Tyler;Espinosa, Zachary I.;Donohoe, Aaron
通讯作者：
Donohoe, Aaron

Diagnosing Mechanisms of Hydrologic Change under Global Warming in the CESM1 Large Ensemble

全球变暖背景下CESM1大集合水文变化的诊断机制