Establishing long-term baselines of marine variability in the northwest European shelf seas. (Ref:4252)

建立欧洲西北部陆架海海洋变化的长期基线。

• 批准号: 2698501
• 金额: --
• 依托单位: UNIVERSITY OF EXETER
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2698501
• 关键词: Establishing; long; term; baselines; marine

Project Background:Marine environments are experiencing unprecedented pressure from anthropogenic climate change, societal impacts, and exploitation (e.g. fishing and offshore infrastructure projects). Evaluating the magnitude of these impacts requires establishing a baseline for the natural state of variability prior to the impact. Given instrumental marine observations typically only span the past few decades to the mid-20th century they are likely heavily influenced by anthropogenic factors and do not provide a representative baseline of natural marine variability. This project seeks to capitalise on recent advances in the development of ultra-high resolution records of past marine variability based on growth ring patterns and the geochemical composition of long-lived marine bivalve molluscs (sclerochronologies), synonymous to dendrochronology. These sclerochronological records provide faithful records of past marine variability and provide significant potential for addressing fundamental questions about the nature of modern and past marine variability. Project aims and methods:This project seeks to generate and exploit a cutting edge network of ultra-high-resolution environmental records to determine the state of past marine variability over past centuries. These records will be used to address key questions associated with the nature of modern marine variability including: Are observed modern trends in ecological/physical marine variability unprecedented in the context of past centuries? To what extent are warming sea surface temperatures impacting pelagic and benthic ecosystems? Are observed changes in North Atlantic Ocean circulation patterns impacting NW European shelf sea ecosystems? To answer these questions, growth rings and the geochemical composition of the shells of the longest-lived animals on Earth (marine clams) will be employed to establish environmental reconstructions that span past decades to centuries from key locations across the NW European shelf seas. These records will be calibrated against marine observations (e.g. sea surface temperature, and the Continuous Plankton Recorder dataset) using cutting edge statistical modelling techniques to generate climate field reconstructions of past marine variability. The coupled observation and proxy based datasets will be interrogated to provide a probabilistic understanding of the nature of modern marine variability set against the newly defined long-term context.Project Partners:The student will be based within the Sclerochronology and Scleroclimatology Research Group at the Centre for Geography and Environmental Science (university of Exeter). Geochemical analyses will be conducted in the Stable Isotope Laboratory and Celtic Lab within the School of Earth and Environmental Science (Cardiff University). The project is partnering with Plymouth Marine Laboratory and the Marine Biological Association who are providing leading expertise in modern marine monitoring and ecological data analysis. The MBA and PML will provide the necessary facilities to assist this training and support throughout the project.Training:Training will be provided on all specialised sclerochronological and geochemical microsampling/analysis. The ERC funded SEACHANGE project will provide additional training and field work opportunities. Opportunities will be available for ship based field work as part of the Western Channel Observatory monitoring programme

项目背景：海洋环境正经历着来自人类气候变化、社会影响和开发（如渔业和近海基础设施项目）的前所未有的压力。要评估这些影响的程度，就需要在影响发生之前为自然变化状态确定一个基线。鉴于仪器海洋观测通常只跨越过去几十年到世纪中期，它们可能受到人为因素的严重影响，不能提供海洋自然变化的代表性基线。该项目旨在利用最近的进展，在过去的海洋变化的超高分辨率记录的基础上生长轮模式和长寿的海洋双壳类软体动物（sclerochronologies）的地球化学成分的发展，同义树年代学。这些硬年代学记录提供了过去海洋变化的忠实记录，并为解决现代和过去海洋变化的性质的基本问题提供了巨大的潜力。项目目标和方法：该项目力求建立和利用一个最先进的超高分辨率环境记录网络，以确定过去几个世纪海洋变化的状况。这些记录将被用来解决与现代海洋变异性的性质有关的关键问题，包括：观察到的生态/物理海洋变异性的现代趋势在过去几个世纪中是前所未有的吗？海洋表面温度的升高在多大程度上影响了水层和海底生态系统？观察到的北大西洋环流模式的变化是否影响西北部欧洲大陆架海洋生态系统？为了回答这些问题，将利用地球上最长寿的动物（海洋蛤）的年轮和贝壳的地球化学组成来建立横跨西北欧洲大陆架海关键地点的过去几十年至几个世纪的环境重建。这些记录将根据海洋观测（例如海面温度和连续浮游生物记录仪数据集）进行校准，使用最先进的统计建模技术，以生成过去海洋变化的气候场重建。耦合观测和代理的数据集将被询问，以提供对现代海洋变化的性质的概率理解设置对新定义的长期context.Project合作伙伴：该学生将在地理和环境科学中心（埃克塞特大学）的Sclerochronology和sclerocclimatology研究小组。地球化学分析将在地球与环境科学学院（卡迪夫大学）的稳定同位素实验室和凯尔特实验室进行。该项目与普利茅斯海洋实验室和海洋生物协会合作，他们在现代海洋监测和生态数据分析方面提供领先的专业知识。MBA和PML将提供必要的设施，以协助整个项目的培训和支持。培训：培训将提供所有专业的硬年代学和地球化学微量取样/分析。ERC资助的SEACHANGE项目将提供额外的培训和实地工作机会。作为西海峡天文台监测计划的一部分，将有机会进行基于船舶的实地工作