Ocean influence on recent climate extremes

海洋对近期极端气候的影响

• 批准号: 2890427
• 金额: --
• 依托单位: University of Southampton
• 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-2890427
• 关键词: Ocean; influence; recent; climate; extremes

In this project the student will use a state-of-the-art eddy-resolving global ocean simulation which covers the period from 1958 to present to study the genesis of ocean temperature and salinity anomalies. This simulation is regularly updated and will allow us to investigate any ocean anomaly that may develop during the course of the project. The goal will be to understand whether these ocean anomalies result from advection, the meandering of major ocean currents such as the Gulf Stream or the Kuroshio, local forcing from the atmosphere or from the re-emergence of subsurface anomalies. Techniques that will be used include lagrangian tracking as well as establishing the force balances (e.g. geostrophy, wind forcing) that govern the ocean circulation anomalies which precede/coincide with the development of ocean temperature/salinity anomalies. Additionally, the student will perform idealised attribution experiments, where atmospheric conditions are either variable or kept constant (respectively climatological). In combination these three approaches will allow us to determine the respective contributions of ocean and atmospheric circulations to ocean temperature and salinity anomalies.

在该项目中，学生将使用最先进的涡流解析全球海洋模拟（涵盖 1958 年至今）来研究海洋温度和盐度异常的成因。该模拟定期更新，使我们能够调查项目过程中可能出现的任何海洋异常情况。目标是了解这些海洋异常是否是由平流、墨西哥湾流或黑潮等主要洋流的蜿蜒、大气的局部强迫或地下异常的重新出现造成的。将使用的技术包括拉格朗日跟踪以及建立控制海洋环流异常的力平衡（例如地转、风力强迫），这些异常先于/与海洋温度/盐度异常的发展同时发生。此外，学生将进行理想化归因实验，其中大气条件是可变的或保持恒定（分别是气候）。结合这三种方法将使我们能够确定海洋和大气环流对海洋温度和盐度异常的各自贡献。