AON Collaborative Research: Continuation of long-term Beaufort Gyre observations in 2020-2024 to enhance understanding of the Arctic's role in climate variability

AON 合作研究：2020-2024 年继续进行长期波弗特环流观测，以加深对北极在气候变化中的作用的了解

• 批准号: 1950077
• 负责人: Mary-Louise Timmermans
• 金额: $ 66.6万
• 依托单位: Yale University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2020
• 资助国家: 美国
• 起止时间: 2020-06-01 至 2025-05-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1950077&HistoricalAwards=false
• 关键词: AON; Collaborative; Research; Continuation; long

The Arctic is undergoing rapid climate change, with atmospheric temperatures warming at a rate greater than twice the global average, a precipitous decline in Arctic sea ice, and sustained accumulation of heat and freshwater in the ocean. These changes have extensive consequences for global climate, marine ecosystems and geopolitics. The Beaufort Gyre is one of the Arctic Ocean’s main sea-ice and ocean circulation systems and a centerpiece for Arctic and global change. The most pronounced sea-ice losses and ocean changes are observed in this region. Conspicuous examples are the substantial increases in concentrations of relatively fresh water in the ocean, and in the amount of heat contained in the ocean. Other prominent changes in the Beaufort Gyre include ocean acidification and transformations in the marine ecosystem. This project is an extensive observing program to document and analyze the Beaufort Gyre’s evolving sea ice and ocean properties. In-depth analyses of the data provide understanding of the Beaufort Gyre’s role in the Arctic and global climate system, which is essential to develop the most viable future climate predictions.This project builds upon the discoveries of the 2003-2020 Beaufort Gyre Observing System (BGOS) project to sample and analyze the Beaufort Gyre. BGOS operations are continued in 2020-2024 including an extensive analysis and interpretation of the data. Ocean moorings sample seawater properties and sea-ice to resolve sub-daily to interannual variability. Annual ship-based ocean sampling, in collaboration with Canadian scientists, augments the year-round mooring measurements. The data comprise measurements of heat, freshwater, currents, bottom pressure, biogeochemical properties, and sea ice. These observations are analyzed and interpreted in context with the existing long-term measurements to test key hypotheses related to the evolving freshwater, energetics of the ice-ocean system, the accumulation of ocean heat, and biogeochemistry. The BGOS program coordinates with and accommodates other national and international projects to enhance effectiveness and interconnections of observing activities. The project includes training of students, providing them with the opportunity to participate in BGOS expeditions and advising them in BGOS data analysis. This encompasses an educational exchange between Yale and Woods Hole Oceanographic Institution involving graduate students and summer undergraduate students, and tiered mentoring. Other broader impacts include ship-board scientific presentations, tutorials, and dispatches, participation in the NSF PolarTREC program, and engagement of Arctic communities in Canada and Alaska. The long-term Beaufort Gyre system perspective and knowledge gained from the data and analysis are vital to a wide variety of Arctic processes and, ultimately, our understanding of the climate system.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.

北极正在经历快速的气候变化，大气温度以超过全球平均水平两倍的速度变暖，北极海冰急剧减少，海洋中的热量和淡水持续积累。这些变化对全球气候、海洋生态系统和地缘政治产生了广泛的影响。博福特环流是北冰洋的主要海冰和海洋环流系统之一，也是北极和全球变化的中心。在这一区域观察到最明显的海冰损失和海洋变化。明显的例子是海洋中相对新鲜的水的浓度和海洋中所含的热量大幅增加。博福特环流的其他显著变化包括海洋酸化和海洋生态系统的转变。该项目是一个广泛的观测计划，以记录和分析博福特环流的演变海冰和海洋属性。通过对数据的深入分析，可以了解博福特环流在北极和全球气候系统中的作用，这对发展最可行的未来气候预测至关重要。该项目建立在2003-2020年博福特环流观测系统（BGOS）项目的发现基础上，对博福特环流进行采样和分析。BGOS将于2020-2024年继续运营，包括对数据的广泛分析和解释。海洋系泊采样海水属性和海冰，以解决亚日常年际变化。与加拿大科学家合作，每年在船上进行海洋取样，以加强全年的系泊测量。这些数据包括热量、淡水、海流、海底压力、海洋地球化学性质和海冰的测量结果。这些观测结果进行了分析和解释的背景下，与现有的长期测量，以测试有关不断变化的淡水，冰-海洋系统的能量学，海洋热量的积累，和海洋地球化学的关键假设。BGOS计划与其他国家和国际项目协调并提供服务，以提高观测活动的有效性和相互联系。该项目包括培训学生，为他们提供参加地球观测卫星联盟考察的机会，并就地球观测卫星联盟数据分析向他们提供咨询。这包括耶鲁大学和伍兹霍尔海洋研究所之间的教育交流，涉及研究生和暑期本科生，以及分层指导。其他更广泛的影响包括船上科学演示，教程和派遣，参与NSF PolarTREC计划，以及加拿大和阿拉斯加北极社区的参与。长期的博福特环流系统的观点和从数据和分析中获得的知识对各种各样的北极过程至关重要，最终，我们对气候系统的理解。该奖项反映了NSF的法定使命，并被认为值得通过使用基金会的知识价值和更广泛的影响审查标准进行评估来支持。

项目成果

Arctic Cyclone Activity and the Beaufort High

北极气旋活动和波弗特高压

• DOI: 10.1175/jcli-d-20-0771.1
• 发表时间: 2021
• 期刊: Journal of Climate
• 影响因子: 4.9
• 作者: Kenigson, Jessica S.;Timmermans, M.-L.
• 通讯作者: Timmermans, M.-L.

Nordic Seas Hydrography in the Context of Arctic and North Atlantic Ocean Dynamics

• DOI: 10.1175/jpo-d-20-0071.1
• 发表时间: 2020-11
• 期刊: Journal of Physical Oceanography
• 影响因子: 3.5
• 作者: J. Kenigson;M. Timmermans

Physical mechanisms of the linear stabilization of convection by rotation

旋转对流线性稳定的物理机制

• DOI: 10.1103/physrevfluids.7.083501
• 发表时间: 2022
• 期刊: Physical Review Fluids
• 影响因子: 2.7
• 作者: Carpenter, Jeffrey R.;Liang, Yu;Timmermans, Mary-Louise;Heifetz, Eyal
• 通讯作者: Heifetz, Eyal

Heat stored in the Earth system 1960–2020: where does the energy go?

• DOI: 10.5194/essd-15-1675-2023
• 发表时间: 2023-04
• 期刊: Earth System Science Data
• 影响因子: 11.4
• 作者: K. Schuckmann;Audrey Minère;Flora Gues;3. FranciscoJoséCuesta;Valero;G. Kirchengast;S. Adusumilli;F. Straneo;R. Allan;M. Barker;H. Beltrami;T. Boyer;Lijing Cheng;J. Church;5. Damien;Desbruyères;H. Dolman;C. Domingues;A. García‐García;6. Donata;Giglio;J. Gilson;M. Gorfer;L. Haimberger;S. Hendricks;S. Hosoda;G. Johnson;R. Killick;Brian King;N. Kolodziejczyk;A. Korosov;G. Krinner;Mikael Kuusela;M. Langer;T. Lavergne;Isobel R. Lawrence;Yuehua Li;J. Lyman;B. Marzeion;M. Mayer;10 AndrewH.;MacDougall;T. McDougall;D. Monselesan;Jan Nitzbon;Inès N. Otosaka;Jian Peng;S. Purkey;D. Roemmich;Kanako Sato;Katsunari Sato;12 Abhishek;Savita;A. Schweiger;A. Shepherd;S. Seneviratne;L. Simons;A. Slater;T. Slater;Noah A. Smith;A. Steiner;T. Suga;T. Szekely;W. Thiery;M. Timmermans;Inne Vanderkelen;Susan E. Wjiffels;15 Tonghua;Wu;M. Zemp

Declining O 2 in the Canada Basin Halocline Consistent With Physical and Biogeochemical Effects of Pacific Summer Water Warming

加拿大盆地盐跃层 O 2 下降与太平洋夏季海水变暖的物理和生物地球化学效应一致

• DOI: 10.1029/2022jc019418
• 发表时间: 2023
• 期刊: Journal of Geophysical Research: Oceans
• 作者: Arroyo, Ashley;Timmermans, Mary‐Louise;Le Bras, Isabela;Williams, William;Zimmermann, Sarah
• 通讯作者: Zimmermann, Sarah