Collaborative Research: Linking sea ice and snow cover changes to Greenland mass balance through stratospheric and tropospheric pathways

合作研究：通过平流层和对流层路径将海冰和积雪变化与格陵兰岛质量平衡联系起来

基本信息

批准号：
1900324
负责人：
Thomas Mote
金额：
$ 24.76万
依托单位：
University of Georgia Research Foundation Inc
依托单位国家：
美国
项目类别：
Standard Grant
财政年份：
2019
资助国家：
美国
起止时间：
2019-09-01 至 2023-08-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=1900324&HistoricalAwards=false
关键词：
Collaborative Research Linking sea ice

项目摘要

Melting of the Greenland ice sheet is already the largest single contributor to sea level rise, and the rate of melt is accelerating. At the same time, the Arctic as a whole is experiencing unprecedented changes and setting new records, including the decline of Arctic sea ice cover, the decline and early snowmelt onset of Northern Hemisphere snow cover, and an overall warming at a rate more than double anywhere else on the planet. Studying and understanding the mechanisms linking the different Arctic components (Greenland, snow cover, and sea ice in the case of this research) and how, in turn, their changes are related to and driven by the atmosphere is fundamental to capture the physical processes driving the changes. This is, indeed, one of the key aspects to considerably improve our skills in estimating the future evolution of the Arctic under different warming scenarios and in projecting future sea level rise.This research is quantifying the relationships between sea ice, snow cover, atmospheric circulation changes and mass changes over the Greenland ice sheet through a combination of observational and modeling tools. These include in situ observations of sea ice cover and snow extent as well as remote sensing products and estimates of atmospheric circulation changes and outputs from climate models. We also use artificial intelligence (e.g., neural networks) to examine relationships between climate, atmospheric patterns and Greenland changes. Ultimately, this research is testing the hypothesis that atmospheric circulation changes associated with sea ice and snow cover extent variability control the mass balance of the Greenland ice sheet by modulating snowfall and surface melting. This research is also providing new insights on the linkages between the Arctic and mid-latitudes and how sea ice and snow cover changes might affect weather patterns outside the Arctic, including the United States.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.

格陵兰冰盖的融化已经是海平面上升的最大单一因素，而且融化速度正在加快。与此同时，整个北极正在经历前所未有的变化并创下新纪录，包括北极海冰面积减少、北半球积雪减少和融雪提前、整体变暖速度增加一倍以上地球上的任何其他地方。研究和理解北极不同组成部分（本研究中的格陵兰岛、积雪和海冰）之间的联系机制，以及它们的变化如何与大气相关并由大气驱动，对于捕获驱动的物理过程至关重要的变化。这确实是显着提高我们在不同变暖情景下估计北极未来演变和预测未来海平面上升技能的关键方面之一。这项研究正在量化海冰、积雪和大气环流之间的关系通过观测和建模工具的结合，格陵兰冰盖的变化和质量变化。这些包括对海冰覆盖和积雪范围的现场观测以及遥感产品以及对大气环流变化和气候模型输出的估计。我们还使用人工智能（例如神经网络）来研究气候、大气模式和格陵兰岛变化之间的关系。最终，这项研究正在检验这样一个假设：与海冰和积雪范围变化相关的大气环流变化通过调节降雪和表面融化来控制格陵兰冰盖的质量平衡。这项研究还为北极与中纬度地区之间的联系以及海冰和积雪变化如何影响北极以外地区（包括美国）的天气模式提供了新的见解。该奖项反映了 NSF 的法定使命，并被认为是值得的通过使用基金会的智力优势和更广泛的影响审查标准进行评估来提供支持。

项目成果

期刊论文数量（6）

专著数量（0）

科研奖励数量（0）

会议论文数量（0）

专利数量（0）

CESM2 Idealized Experiment Output: Summer atmospheric response to May snow cover loss over North American

CESM2 理想化实验输出：夏季大气对北美五月积雪损失的响应

DOI：
10.18739/a2gh9bb54
发表时间：
2023
期刊：
NSF Arctic Data Center
影响因子：
0
作者：
Preece, Jonathon;Mote, Thomas;Cohen, Judah;Wachowicz, Lori;John, Knox;Tedesco, Marco;Kooperman, Gabriel
通讯作者：
Kooperman, Gabriel

Summer Greenland Blocking Diversity and Its Impact on the Surface Mass Balance of the Greenland Ice Sheet