Collaborative Research: Repeat Observations by Gliders in the Equatorial Region (ROGER)

知识价值该项目的目标是量化太平洋赤道锋和赤道潜流(EUC)的位置和强度的变化，以及加拉帕戈斯群岛周围的水流分配。实地工作将包括三个持续的高分辨率滑翔机横断面，以评估赤道洋流系统的可变性，包括加拉帕戈斯群岛对欧洲联盟委员会的阻碍。西经93度的一段将代表大洋洲和群岛以西的赤道锋面，连接该段北端和南端与群岛的两段将量化大洋中区如何被划分为路径。使用四个滑翔机，每个部分将每10天重复一次，因此几乎不能解决热带不稳定波在20天的周期变化。配备CTD和ADPS的喷雾滑翔机将每3小时俯冲500米，在潜水周期中覆盖3公里。科学分析，包括使用新的高分辨率模式对观测结果的解释，将侧重于量化赤道洋流系统从季节到周的时间演变，直至10公里的水平尺度。将对质量、热量和盐分的水平通量进行估计。EUC的路径将被确定。观测结果将与赤道海流系统现有的一系列数值模式和赤道太平洋正在进行的数据同化分析进行比较和分析。广泛的影响现有的观测尚未提供对赤道海流系统或EUC终端的亚中尺度结构和可变性的充分描述，这仍然是限制模型和理解世界上最动态的生态系统之一的主要限制。拟议的系统和持续观测方案将产生用于热带太平洋状态估计的数据，遵循推荐的过程研究最佳做法，从一开始就将模式与观测相结合，产生适用于模式验证的有质量控制的数据集，并鼓励广泛使用这些数据。每个机构的一名研究生将利用这些数据来增加赤道东太平洋测量和分析方面的科学专门知识。结果将在国家和国际会议以及同行评议的期刊上广泛传播。将准备一个适合公众的关于大洋洲联盟动态的维基百科页面，以及大洋洲联盟海洋杂志的观测史。与赤道海洋学家的合作将对他们进行滑翔机操作和滑翔机数据分析方面的培训。

Intellectual MeritThe objectives of this project are to quantify the variability in the position and strength of the Pacific Equatorial Front and Equatorial Undercurrent (EUC), and the partitioning of flow around the Galapagos Archipelago. The field work will consist of three sustained high-resolution glider transects to assess variability of the Equatorial Current System, including the obstruction of the EUC by the Galapagos Archipelago. A section at 93W will be representative of the EUC and equatorial front to the west of the Archipelago, and two sections connecting the northern and southern ends of this section to the Archipelago will quantify how the EUC is partitioned into pathways. Using four gliders, each section will be repeated every 10 days, thus barely resolving tropical instability wave variability at a period of 20 days. Spray gliders equipped with CTD and ADPs will profile to 500 m every 3 hours, covering 3 km during the dive cycle. Scientific analyses, including the interpretation of the observations using a new high-resolution model, will focus on quantifying the temporal evolution on scales from seasons to weeks in the Equatorial Current System down to horizontal scales of 10 km. Estimates will be made of horizontal fluxes of mass, heat, and salt. The pathway of the EUC will be determined. Observations will be compared and analyzed with a hierarchy of extant numerical models of the Equatorial Current System and an ongoing data assimilation analysis of the Equatorial Pacific.Broader ImpactsAvailable observations do not yet provide an adequate description of the submesoscale structure and variability of the Equatorial Current System or the EUC termination, which remains a major limitation to constraining models and understanding one of the world's most dynamic ecosystems. The proposed systematic and sustained observational program will produce data to be used in a state estimate of the tropical Pacific following recommended best practices for process studies by integrating models with observations from the start, producing quality-controlled data sets suitable for model validation, and encouraging broad use of the data. One graduate student at each institution will work with these data to increase the scientific expertise in eastern equatorial Pacific measurements and analyses. Results will be broadly disseminated at national and international meetings and in peer-reviewed journals. A Wikipedia page on the dynamics of the EUC suitable for the general public and an observational history of the EUC for Oceanography magazine will be prepared. Collaboration with Equadorian oceanographers will train them in the glider operations and the analysis of the glider data.