Collaborative Research: Physical-Biological Processes of Gulf Stream Warm Core Rings: Vertical Nutrient Delivery and Ecosystem Response

合作研究：墨西哥湾流暖核环的物理生物过程：垂直养分输送和生态系统响应

• 批准号: 1558960
• 负责人: Ke Chen
• 金额: $ 39.88万
• 依托单位: Woods Hole Oceanographic Institution
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2016
• 资助国家: 美国
• 起止时间: 2016-04-01 至 2021-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1558960&HistoricalAwards=false
• 关键词: Collaborative; Research; Physical; Biological; Processes

Warm core rings acting between western boundary currents and the continental shelf exert significant impact on the physical and biological environments of the slope seas and coastal oceans, which are major contributors to the global primary production. However, compared to that of eddies in the open ocean, the role of Gulf Stream warm core rings in the biophysical processes of the shelf-slope system has received less attention, and contrasting results exist. This study will elucidate the key biophysical mechanisms by investigating the biomass characteristics and the dominant physical mechanisms controlling the vertical nutrient delivery associated with Gulf Stream warm core rings. The improved understanding on nutrient dynamics from this research will contribute to the stewardship of living marine resources, and better ecosystem management. Research findings will be presented to the general public through public lectures. This project will also support the training of undergraduate students outside of oceanography through the Summer Undergraduate Research Program at the Woods Hole Oceanographic Institution.This project investigates the physical-biological processes associated with the evolution of Gulf Stream warm core rings in the shelf-slope system of the Northwest Atlantic, with a focus on the dominant physical processes controlling vertical nutrient delivery. The research will include analyses of satellite data, historical in situ data, and numerical simulations. For better understanding of the relative importance of several mesoscale biophysical processes, the photoautotrophic biomass within the warm core rings will be characterized first using satellite observed sea surface height and chlorophyll concentration. The investigators will then conduct idealized numerical modeling experiments to identify the dominant physical processes responsible for vertical nutrient delivery including vertical mixing and vertical advection induced by frictional decay, eddy-induced Ekman pumping, and wind-sea surface temperature interaction. The findings from the idealized modeling will be further synthesized in a realistic coupled biophysical model for the Northwest Atlantic region.

西方边界电流和大陆架之间作用的温暖核心环对坡度和沿海海洋的物理和生物环境产生重大影响，这是全球主要产量的主要贡献者。但是，与露天中的涡流相比，海湾流芯环在架子斜坡系统的生物物理过程中的作用较少，并且存在对比的结果。这项研究将通过研究与墨西哥湾流暖核环相关的垂直营养递送的生物量特征和主要的物理机制来阐明关键的生物物理机制。 这项研究中对营养动力学的了解得以提高，将有助于实现海洋资源的管理和更好的生态系统管理。研究结果将通过公开讲座提交给公众。该项目还将支持伍兹霍尔海洋学机构的夏季本科研究计划以外的海洋学以外的本科生的培训。本项目研究了与西北大西洋的架子斜坡系统中海湾流式核心戒指演变相关的物理生物学过程，重点介绍了主体物理过程的占主导地位，并侧重于机理流程，控制着较大的物理过程。该研究将包括对卫星数据，历史原位数据和数值模拟的分析。为了更好地理解几个中尺度生物物理过程的相对重要性，首先使用卫星观察到的海面高度和叶绿素浓度来对温暖核环内的光自养生物量进行表征。然后，研究人员将进行理想化的数值建模实验，以确定负责垂直养分递送的主要物理过程，包括垂直混合和由摩擦衰减引起的垂直对流，埃迪引起的Ekman泵送和风向 - 海面表面温度相互作用。 理想化的建模的发现将在西北大西洋地区的现实耦合生物物理模型中进一步合成。