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

这个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洋流的划分。实地工作将包括三个持续的高分辨率滑翔机样带，以评估赤道洋流系统的可变性，包括加拉帕戈斯群岛对EUC的阻碍。西经93W的部分将代表EUC和群岛西部的赤道锋，连接该部分的南北两端到群岛的两个部分将量化EUC如何划分为路径。使用4个滑翔机，每10天重复一次每个部分，因此只能在20天的周期内勉强解决热带不稳定波的变化。配备CTD和adp的喷雾滑翔机每3小时可滑行500米，在潜水周期内可飞行3公里。科学分析，包括使用一种新的高分辨率模型对观测结果进行解释，将重点放在从季节到周的尺度上量化赤道流系统的时间演变，直至10公里的水平尺度。将对质量、热量和盐的水平通量进行估计。欧盟的道路将被确定。观测结果将与现有赤道流系统数值模式的层次结构和正在进行的赤道太平洋数据同化分析进行比较和分析。现有的观测资料还不能充分描述赤道流系统或EUC终止的亚中尺度结构和变率，这仍然是限制模式和理解世界上最具活力的生态系统之一的主要限制。拟议的系统和持续观测计划将根据过程研究推荐的最佳实践，通过从一开始就将模型与观测结合起来，生成适合模型验证的质量控制数据集，并鼓励数据的广泛使用，产生用于热带太平洋状态估计的数据。每个研究所的一名研究生将利用这些数据增加赤道东太平洋测量和分析的科学专业知识。结果将在国家和国际会议上以及同行评议的期刊上广泛传播。将为公众准备一个关于EUC动力学的维基百科页面，并为海洋学杂志准备EUC的观测历史。与赤道国海洋学家的合作将对他们进行滑翔机操作和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.