New high-resolution observations of ocean surface current and winds from innovative airborne and satellite measurements

通过创新的机载和卫星测量对海洋表面流和风进行新的高分辨率观测

基本信息

批准号：
2901696
负责人：
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-2901696
关键词：
New resolution observations ocean surface

项目摘要

High-resolution satellite images of ocean colour reveal a multitude of oceanic features at scales below 10km. Small eddies, whirls and filaments permeate the global ocean but are particularly frequent near current jets, mesoscale eddies, in coastal seas and near sea ice. Recent research show that these small-scale processes play a critical role in the global climate system by modulating interactions between the atmosphere, ocean, land and cryosphere - impacting vertical exchanges of heat, gases, freshwater and nutrients between the surface and the ocean interior and horizontal transport pathways. However, today's knowledge of these processes stems mainly from models, with little observational data available for validation. Measuring small scales in situ is extremely challenging, expensive and rare. This project investigates a new type of ocean observations from the innovative OSCAR airborne system that images ocean current and wind fields at 1km resolution or finer. The project analyses data from two recent airborne campaigns in France and the Netherlands, comparing with high-resolution models, in situ sensors and satellites. The project will demonstrate the added-value of OSCAR data to understand and model small-scale ocean dynamics, and strengthen the scientific motivation of the Earth Explorer 11 SEASTAR mission candidate (Gommenginger et al., 2019).

海洋颜色的高分辨率卫星图像揭示了 10 公里以下尺度的众多海洋特征。小涡流、漩涡和细丝遍布全球海洋，但在洋流急流、中尺度涡流、沿海海域和海冰附近尤其常见。最近的研究表明，这些小规模过程通过调节大气、海洋、陆地和冰冻圈之间的相互作用，在全球气候系统中发挥着关键作用——影响地表和海洋内部之间热量、气体、淡水和营养物质的垂直交换。水平运输路径。然而，今天对这些过程的了解主要来自模型，几乎没有可用于验证的观测数据。原位测量小尺度极具挑战性、昂贵且罕见。该项目研究创新型 OSCAR 机载系统的新型海洋观测，该系统能够以 1 公里或更精细的分辨率对洋流和风场进行成像。该项目分析了法国和荷兰最近两次机载战役的数据，与高分辨率模型、现场传感器和卫星进行比较。该项目将展示 OSCAR 数据在理解和模拟小规模海洋动力学方面的附加值，并增强地球探索者 11 SEASTAR 候选任务的科学动机（Gommenginger 等，2019）。