Collaborative Research: NSFGEO-NERC: QUICCHE: Quantifying Interocean fluxes in the Cape Cauldron Hotspot of Eddy kinetic energy

合作研究：NSFGEO-NERC：QUICCHE：量化涡流动能 Cape Cauldron 热点中的洋间通量

• 批准号: 2148677
• 负责人: Kathleen Donohue
• 金额: $ 206.21万
• 依托单位: University of Rhode Island
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2022
• 资助国家: 美国
• 起止时间: 2022-04-01 至 2027-03-31
• 项目状态: 未结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=2148677&HistoricalAwards=false
• 关键词: Collaborative; Research; NSFGEO; NERC; QUICCHE

This is a project that is jointly funded by the National Science Foundation’s Directorate of Geosciences (NSF/GEO) and the National Environment Research Council (UKRI/NERC) of the United Kingdom (UK) via the NSF/GEO-NERC Lead Agency Agreement. This Agreement allows a single joint US/UK proposal to be submitted and peer-reviewed by the Agency whose investigator has the largest proportion of the budget. Upon successful joint determination of an award, each Agency funds the proportion of the budget and the investigators associated with its own ivestigators and component of the work.The Cape Basin in the southeast Atlantic is a global hotspot of eddy kinetic energy, fed by a leakage of waters from the subtropical Indian Ocean via the Agulhas Current. A proportion of warm and salty Agulhas waters is vigorously stirred and mixed into the cooler and fresher Atlantic by co-interacting rings and eddies. This project will address the hypothesis that a large proportion of the Indian Ocean waters that leak into the Atlantic is to be found in submesoscale (less than approximately 1 km) features generated by deformations of the mesoscale (tens to hundreds of km) flow field. The project will observe and characterize, for the first time, submesoscale features generated by mesoscale recirculations within the Cape Cauldron. The observations will be used to estimate Agulhas leakage fluxes with theoretical eddy diffusivity and eddy flux frameworks. The results will be related to new and existing satellite altimeter observations to infer variability in Agulhas leakage. Outreach and education activities include production of two short films aboard ship, student and intern visits to the ship, hands-on experience building ocean drifters at Miami high schools, and creation of a popular science article and an educational, oceanographic card game for school children.This project will entail the collection of new observations within the Cape Basin of filamentation and eddy interaction to measure the related submesoscale features and estimate diffusivities. These measurements will be used to quantify eddy heat and salt fluxes. Observations will be made using both Eulerian and Lagrangian instrumentation, including moorings, an undulating CTD system, gliders, drifters, profiling floats, and microstructure turbulence profilers, capturing time and space scales from hours to seasons and from 1 to 100 km. The observations will be synthesized and analyzed with other datasets including measurements from the SWOT crossover in the Cape Basin and output from an ocean model. The observations will also be used to evaluate the new NASA SWOT (Surface Water and Ocean Topography) satellite mission at a swatch crossover point in the study region.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.

该项目由美国国家科学基金会地球科学理事会 (NSF/GEO) 和英国国家环境研究理事会 (UKRI/NERC) 通过 NSF/GEO-NERC 牵头机构协议共同资助。该协议允许美国/英国联合提案由其研究人员拥有最大预算比例的机构提交并进行同行评审。在成功联合确定资助后，每个机构将资助该比例的预算和相关研究人员。拥有自己的大西洋东南部的开普盆地是全球涡流动能热点，由亚热带印度洋通过厄加勒斯洋流泄漏的海水供给，一部分温暖且咸的厄加勒斯海水被剧烈搅动。并通过相互作用的环和涡流混合到更凉爽和更新鲜的大西洋中。该项目将解决这样的假设：泄漏到大西洋的印度洋水域的很大一部分是在亚中尺度发现的。由中尺度（数十至数百公里）流场变形产生的（小于约1公里）特征该项目将首次观测并表征Cape Cauldron内中尺度再循环产生的亚中尺度特征。用于通过理论涡扩散率和涡通量框架来估计阿古拉斯泄漏通量。结果将与新的和现有的卫星高度计观测相关，以推断阿古拉斯泄漏的变化。外展和教育活动包括在船上制作两部短片、学生和实习生参观船上、在迈阿密高中体验建造海洋漂流者的实践经验，以及为学童创作科普文章和教育性海洋学纸牌游戏该项目将收集开普盆地内丝状和涡流相互作用的新观测结果，以测量相关的亚尺度特征并估计扩散率。这些测量结果将用于量化涡流热和盐通量观测。使用欧拉和拉格朗日仪器，包括系泊装置、波动 CTD 系统、滑翔机、漂流器、剖面浮标和微观结构湍流剖面仪，捕获从小时到季节、从 1 到 100 公里的时间和空间尺度的观测结果。与其他数据集（包括开普盆地 SWOT 交叉测量和海洋模型输出）的观测结果也将用于评估新的 NASA SWOT。 （地表水和海洋地形）在研究区域样本交叉点的卫星任务。该奖项反映了 NSF 的法定使命，并通过使用基金会的智力优点和更广泛的影响审查标准进行评估，被认为值得支持。