Collaborative Research: Boundary Current Control of Upwelling in Southern Drake Passage: Whither Weddies?

合作研究：南德雷克海峡上升流的边界流控制：婚姻何去何从？

• 批准号: 1246160
• 负责人: Janet Sprintall
• 金额: $ 12.78万
• 依托单位: University of California-San Diego Scripps Inst of Oceanography
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2013
• 资助国家: 美国
• 起止时间: 2013-07-15 至 2018-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1246160&HistoricalAwards=false
• 关键词: Collaborative; Research; Boundary; Current; Control

Mesoscale processes (~ length scales of up to 100km) are an essential ingredient of the coupling between the waters of the Antarctic margins and the greater Southern Ocean, yet there is a paucity of observations at these space and time scales. The tip of the Antarctic Peninsula is a unique and dynamic environment, and it is of interest to understand how the interaction of large currents with local topographic features and the coupling between physical and biogeochemical processes lead to the transformation of low productivity Antarctic Surface Water (ASW) to high productivity ASW in this region, following admixture with Weddell Sea eddies. By combining high resolution in situ ocean glider observations with remotely-sensed properties of the surface flow, as well as long-term historical data sets, these investigators will infer long-term changes in the frontal structure and mixed layer dynamics of the ACC. The project involves monitoring the fronts in southern Drake Passage over a period of 15 weeks by deploying and piloting a pair of ocean gliders that will collect approximately 1000 profiles of temperature, salinity, dissolved oxygen, fluorescence and optical backscatter. Mesoscale variability in southern Drake Passage influences at least three aspects of Earth?s climate system: the Southern Ocean?s meridional overturning circulation (MOC), air-sea exchange of CO2 and the productivity of the Southern Ocean ecosystems. These processes are of importance to simulating Earth?s climate, and thus to society in general

中尺度过程（~长度尺度可达100公里）是南极边缘沃茨与大南大洋之间耦合的一个重要组成部分，但在这些空间和时间尺度上的观测却很少。南极半岛尖端是一个独特的动态环境，了解大海流与当地地形特征的相互作用以及物理和地球化学过程之间的耦合如何导致该地区低生产力的南极地表水（ASW）转化为高生产力的ASW，并与威德尔海涡旋混合是很有意义的。通过将高分辨率的海洋滑翔机现场观测与表面流的遥感特性以及长期历史数据集相结合，这些调查人员会推断ACC锋面结构和混合层动力学的长期变化。该项目包括在15周内通过部署和驾驶一对海洋滑翔机来监测德雷克海峡南部的锋面，1000个温度、盐度、溶解氧、荧光和光学后向散射剖面。德雷克海峡南部的中尺度变化至少影响地球的三个方面？气候系统：南大洋？南大洋生态系统的生产力、南海翻转环流（MOC）、CO2的海气交换。这些过程对于模拟地球是很重要的。的气候，从而对整个社会