Submesoscale and Surface Gravity Wave Interactions on the Continental Shelf

从海岸线到大陆架断裂带的区域是陆地-海洋界面人类活动与更远的近海生态功能之间的主要联系。一个新的概念是，大陆架充满了非线性，三维流动模式，是0.1 - 1公里的空间尺度与短暂的生命周期小时到天，被称为'亚中尺度'。本项目将使用多尺度模拟方法来研究1）波浪对次中尺度动力学的影响和2）不同类别的次中尺度特征之间的相互作用。所获得的物理知识将改变近岸运输的概念，影响到污染扩散，沿海生物地球化学通量和生态系统功能。通过与当地管理人员的沟通，新的物理理解将为近岸海洋生态系统和娱乐区水质的管理提供信息。将通过与Surfrider基金会协调，向公众和历来代表性不足的青年传播成果。研究合作将有助于开发一个在线波浪环流模型耦合;加强一个关于在大陆架养殖巨型海藻的多机构项目的物理海洋学和技术框架;使关于圣巴巴拉海峡巨型海藻的长期生态研究项目的沿海连通性概念现代化。该项目探讨了表面重力波对各种亚中尺度相干结构的影响及其相互作用，这些结构独特地共存于跨越海岸线到陆架区的区域，包括表层密度锋和细丝、地形尾迹、内部涌潮、淡水羽流和冲浪带涡旋。主要假设是：（1）表面重力波对海流的影响可以显著地改变局部环流、物质通量和近岸亚中尺度相干结构的空间方向;（2）不同现象的共存驱动亚中尺度相互作用，表现为（a）单个锋面或涡旋之间的零星碰撞和（B）调节层化和物质通量的竞争。工具包括一套高分辨率，多重嵌套ROMS模拟，采用非流体静力能力和现实的大气，潮汐和表面波平均强迫，该奖项反映了NSF的法定使命，并通过使用基金会的智力价值和更广泛的影响审查进行评估，被认为值得支持的搜索.

The region spanning the shoreline to the shelf-break serves as a primary connection between human activity at the land-sea interface and ecological functioning farther offshore. An arising conception is that the shelf is filled with nonlinear, 3D flow patterns that are 0.1 - 1 km in spatial scale with ephemeral lifecycles of hours to days, termed ‘submesoscale’. This project will use a multi-scale modeling approach to examine 1) wave effects on submesoscale dynamics and 2) interactions between different classes of submesoscale features. The gained physical knowledge will transform notions of nearshore transport that imprint onto pollution dispersal, coastal biogeochemical fluxes, and ecosystem functioning. New physical understanding will inform management of nearshore marine ecosystems and water-quality in recreational areas through communication with local managers. Results will be disseminated to the general public and historically underrepresented youth through coordination with the Surfrider Foundation. Research collaborations will aid in the development of an online wave-circulation model coupling; strengthen the physical oceanographic and technological framework of a multi-institutional project on the farming of giant kelp on the continental shelf; and modernize conceptions of coastal connectivity for the Long Term Ecological Research Project on giant kelp in the Santa Barbara Channel. This project explores surface gravity wave effects on- and interactions between- the variety of submesoscale coherent structures that uniquely coexist in the region spanning the shoreline to the shelfbreak, including surface layer density fronts and filaments, topographic wakes, internal tidal bores, freshwater plumes, and surfzone vortices. The primary hypotheses are: (1) surface gravity wave effects on currents can significantly modify the local circulation, material fluxes, and spatial orientation of nearshore submesoscale coherent structures and (2) the coexistence of distinct phenomena drives submesoscale interactions that manifest as (a) sporadic collisions between individual fronts or vortices and (b) competition to regulate stratification and material fluxes. Tools include a suite of high-resolution, multiply-nested ROMS simulations employing non-hydrostatic capability and realistic atmospheric, tidal, and surface wave-averaged forcing, and complementary idealized simulations to target the fundamental dynamics and parametric dependencies of these interactions.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.