Collaborative Research: Frontal Interaction and Atmospheric Forcing North of Cape Hatteras, an Analysis and Modeling Study

这项研究将研究搁置破裂喷流与西部边界流的相互作用以及与之相关的大陆架水团的近海输送的动力学。这种情况发生在北太平洋(黑潮/Oyashio)、南大西洋(巴西/马尔维纳斯洋流)和哈特拉斯角(墨西哥湾流/搁置前锋)。重点将放在哈特拉斯角以北的地区，那里的搁板锋面与大陆架分离，并卷入墨西哥湾流。要解决的科学问题是：-搁置急流(加速/减速和从大陆架分离)对墨西哥湾流锋相对于搁置运动的响应，-搁置锋对强风应力和表面热损失强迫的响应-外部大陆架水被带入墨西哥湾流的动力学-陆架动力学如何受到接近哈特拉斯角的陆架宽度收窄的影响，将结合现有的高分辨率数据集，包括在哈特拉斯角附近锋面相互作用(Finch)计划期间收集的数据集，以及一个分区域数值模式来研究这些问题。数值模式将是一个孩子？整个中大西洋海湾的更大比例尺模型的子域。还将使用包括海表面温度和卫星测高在内的辅助数据来深入了解锋面运动及其对力的响应。智力价值这项工作将对理解已知近海平均运输区陆架水出口的基本动力学具有重要意义。分区域模式对于了解这一地区淡水运输和陆架-斜坡交换的长期趋势将是重要的。这一区域与其他大型大陆架出口的重要区域相似，包括北太平洋的黑潮/奥亚西奥会聚和南大西洋的马尔维纳斯/巴西海流会聚。这也是一个有机碳从大陆架到深海运输非常重要的地区。结果将传达给适当的渔业科学家和鲸鱼学家。建模工作将包括研究生支持。Gawkiewicz将继续在伍兹霍尔儿童科学学院开展活动，他在那里的董事会已经有五年了，他已经开始购买海洋仪器(包括配备视频的ROV)，在课堂上广泛发言，协助招聘和评估教师，并帮助制定一些课程的活动。

This study will examine the dynamics of the interaction of a shelfbreak jet with a western boundary current and associated offshore transport of shelf water masses. This situation occurs in the north Pacific (Kuroshio/Oyashio), south Atlantic (Brazil/Malvinas currents), and Cape Hatteras (Gulf Stream,/shelfbreak front). The focus will be on the region north of Cape Hatteras, where the shelfbreak front detaches from the continental shelf and becomes entrained in the Gulf Stream. The science questions to be addressed are:--The response of the shelfbreak jet (acceleration/deceleration and separation from the continental shelf) to motion of the Gulf Stream front relative to the shelfbreak,-- Response of the shelfbreak front to forcing by strong wind stress and surface heat loss-- Dynamics by which outer shelf water is entrained into the Gulf Stream-- How the shelf dynamics are affected by the narrowing shelf width approaching Cape Hatteras, with focus on the vorticity dynamics.A combination of existing high-resolution data sets including those collected during the Frontal Interactions Near Cape Hatteras (FINCH) program as well as a sub-regional numerical model to investigate these questions will be utilized. The numerical model will be a ?child? sub-domain of a larger scale model of the entire Middle Atlantic Bight. Supporting data including sea surface temperature and satellite-based altimetry will also be used to gain insight into frontal motions and their response to forcing.Intellectual MeritThis work will be of importance to understanding fundamental dynamics of shelf water export in a known region of mean offshore transport. The sub-regional model will be important in understanding long-term trends in fresh water transport and shelf-slope exchange in this area. This region is similar to other important regions of large shelf export including the Kuroshio/Oyashio convergence in the north Pacific and the Malvinas/Brazil current convergence in the South Atlantic. This is also a region where organic carbon transport from the shelf to the deep ocean is important.Broader ImpactsThe Hatteras region contains numerous commercial fisheries as well as endangered marine mammal species. Results will be communicated to appropriate fisheries scientists and cetologists. The modeling effort will include graduate student support. Gawarkiewicz will continue activities at the Children's School of Science at Woods Hole, where he has been on the Board of Directors for five years, and has initiated the purchase of oceanographic instruments (including a video-equipped ROV), spoken extensively in classes, assisted in recruitment and evaluation of teachers, and helped develop course activities for a number of classes.