Ocean eyes: Developing novel optical chemical measurements of trace elements

海洋之眼：开发微量元素的新型光学化学测量

• 批准号: 2735330
• 金额: --
• 依托单位: Plymouth University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2735330
• 关键词: Ocean; eyes; Developing; novel; optical

Iron (Fe) in seawater is highly particle reactive and easily removed via sinking particles but despite the importance of marine particles, relatively little is known of their elemental composition. UoP and UoL marine labs have some of the few particulate marine and atmospheric trace metal data for ocean provinces in the world [1-5]. However, particle analysis is laborious and costly, meaning in situ sensor analysis is a highly desirable prospect.Our data from the NERC Shelf Sea Biogeochemistry programme led to an enhanced understanding of Fe dynamics in UK shelf waters [6-9]. More recently, we found that Fe is significantly correlated with optical parameters such as turbidity, opening the door to exciting and novel possibilities of in situ optical and spectroscopic (i.e. UV-Vis, IR and fluorescence) proxies (unpublished data). Furthermore, there is potential for particulate element distributions to be obtained autonomously (i.e. ocean gliders and floats) and remotely via satellite instrumentation.The overall aim of this studentship is to investigate optical and spectroscopic properties of suspended marine particles as proxies for iron concentrations. The project is timely due to the recent availability of data from GEOTRACES programmes, Biogeochemical-Argo float network, tele-communications and integration of optical/spectroscopic sensors into buoys and autonomous vehicles.Objectives: The student will focus on 3 core objectives: Objective 1 complete a comprehensive laboratory study of the elemental, optical and spectroscopic properties of synthesised mineral phases and characterised marine sediments/SPM in seawater (Plymouth and Leeds labs). Objective 2 test hypotheses with monthly surveys of marine suspended particles, optical measurements and trace elements at the Western Channel Observatory (WCO) Objective 3 use past and current sensor data and satellite observations, time series data (i.e. Bermuda BATS) to investigate the potential for mapping particulate element concentrations at regional/basin scales using determined proxies.

海水中的铁 (Fe) 具有高度颗粒反应性，很容易通过下沉颗粒去除，但尽管海洋颗粒很重要，但对其元素组成知之甚少。伦敦大学和伦敦大学海洋实验室拥有世界上一些海洋省份的少数颗粒海洋和大气痕量金属数据 [1-5]。然而，颗粒分析既费力又昂贵，这意味着原位传感器分析是一个非常理想的前景。我们来自 NERC 陆架海洋生物地球化学项目的数据增强了对英国陆架水域中铁动力学的了解 [6-9]。最近，我们发现 Fe 与浊度等光学参数显着相关，这为原位光学和光谱（即紫外-可见光、红外和荧光）代理（未发表的数据）打开了令人兴奋和新颖的可能性之门。此外，有可能通过卫星仪器自主（即海洋滑翔机和浮标）远程获取颗粒元素分布。该学生的总体目标是研究悬浮海洋颗粒的光学和光谱特性，作为铁浓度的代理。该项目是及时的，因为最近可以使用来自 GEOTRACES 计划、生物地球化学-Argo 浮标网络、电信以及将光学/光谱传感器集成到浮标和自动驾驶车辆中的数据。 目标：学生将重点关注 3 个核心目标：目标 1完成对海水中合成矿物相和特征海洋沉积物/SPM 的元素、光学和光谱特性的全面实验室研究（普利茅斯和利兹实验室）。目标 2 通过每月在西海峡天文台 (WCO) 进行海洋悬浮颗粒、光学测量和微量元素调查来测试假设 目标 3 使用过去和当前的传感器数据以及卫星观测数据、时间序列数据（即百慕大 BATS）来研究使用确定的代理绘制区域/盆地尺度的颗粒元素浓度。