The Arctic ocean control of the Atlantic meridional overturning circulation on multi-decadal and longer timescales

多年代和更长时间尺度上北冰洋对大西洋经向翻转环流的控制

• 批准号: 1741841
• 负责人: Alexey Fedorov
• 金额: $ 47.99万
• 依托单位: Yale University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-01-01 至 2021-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1741841&HistoricalAwards=false
• 关键词: Arctic; ocean; control; Atlantic; meridional

A major goal of this study is to understand the impacts of Arctic climate change and their effects on the Atlantic meridional overturning circulation (AMOC). This is of significant practical value because the AMOC can affect the climate of different regions of the globe, ranging from North America, Europe and Greenland to the Sahel and the Indian Ocean. Drs. Fedorov and Liu will conduct outreach activities through the Peabody Museum of Natural History. This includes giving public lectures and symposia, leading Teacher development workshops, and communicating the importance of the results to mass media.This is a modeling proposal to study the effect of declining Arctic sea ice on the strength and other characteristics of the AMOC - a major element of ocean dynamics and climate. Sea ice decline exposes the Arctic ocean to anomalous solar radiation and freshwater fluxes, generating positive buoyancy anomalies in the upper ocean. The hypothesis being tested is that, when spreading to the North Atlantic these buoyancy anomalies effectively weaken ocean deep convection, leading to a slow-down of the AMOC on multi-decadal timescales. This hypothesis will be tested with a variety of methods ranging from adjoint ocean modeling to experiments with climate models.

这项研究的一个主要目标是了解北极气候变化的影响及其对大西洋经向翻转环流(AMOC)的影响。这具有重要的实用价值，因为AMOC可以影响全球不同地区的气候，从北美、欧洲和格陵兰到萨赫勒和印度洋。费多罗夫博士和刘博士将通过皮博迪自然历史博物馆开展外展活动。这包括进行公开讲座和研讨会，领导教师发展研讨会，并向大众媒体传达结果的重要性。这是一个研究北冰洋海冰减少对AMOC强度和其他特征的影响的建模建议--AMOC是海洋动力学和气候的主要因素。海冰的减少使北冰洋暴露在异常的太阳辐射和淡水通量中，在上层海洋产生正浮力异常。正在测试的假设是，当浮力异常扩散到北大西洋时，这些浮力异常有效地减弱了海洋深对流，导致AMOC在数十年的时间尺度上放缓。这一假设将通过各种方法进行验证，从伴随海洋模型到气候模型实验。

项目成果

Indian Ocean warming can strengthen the Atlantic meridional overturning circulation

• DOI: 10.1038/s41558-019-0566-x
• 发表时间: 2019-10-01
• 期刊: NATURE CLIMATE CHANGE
• 影响因子: 30.7
• 作者: Hu, Shineng;Fedorov, Alexey, V
• 通讯作者: Fedorov, Alexey, V

Persistent freshening of the Arctic Ocean and changes in the North Atlantic salinity caused by Arctic sea ice decline

北极海冰减少导致北冰洋持续清新和北大西洋盐度变化

• DOI: 10.1007/s00382-021-05850-5
• 发表时间: 2021
• 期刊: Climate Dynamics
• 影响因子: 4.6
• 作者: Li, Hui;Fedorov, Alexey V.
• 通讯作者: Fedorov, Alexey V.

Mechanisms and Impacts of a Partial AMOC Recovery Under Enhanced Freshwater Forcing

• DOI: 10.1029/2018gl080442
• 发表时间: 2019-03
• 期刊: Geophysical Research Letters
• 影响因子: 5.2
• 作者: Matthew D. Thomas;Alexey V. Fedorov

AMOC Stability and Diverging Response to Arctic Sea Ice Decline in Two Climate Models

• DOI: 10.1175/jcli-d-20-0572.1
• 发表时间: 2021-07-01
• 期刊: JOURNAL OF CLIMATE
• 影响因子: 4.9
• 作者: Li, Hui;Fedorov, Alexey;Liu, Wei
• 通讯作者: Liu, Wei

Global Impacts of Arctic Sea Ice Loss Mediated by the Atlantic Meridional Overturning Circulation

• DOI: 10.1029/2018gl080602
• 发表时间: 2019-01-28
• 期刊: GEOPHYSICAL RESEARCH LETTERS
• 影响因子: 5.2
• 作者: Liu, Wei;Fedorov, Alexey V.
• 通讯作者: Fedorov, Alexey V.