Developing a site survey for scientific ocean drilling on the Mauritanian continental margin

开展毛里塔尼亚大陆边缘科学海洋钻探现场调查

基本信息

批准号：
NE/W00996X/1
负责人：
Mark Ireland
金额：
$ 15.28万
依托单位：
Newcastle University
依托单位国家：
英国
项目类别：
Research Grant
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=NE%2FW00996X%2F1
关键词：
Developing site survey scientific ocean

项目摘要

Large volumes of methane, a potent greenhouse gas, are stored on continental margins in shallow waters (e.g. <500m). These deposits, referred to as methane hydrates are widespread on continental margins and are considered to be one of the largest methane reservoirs that naturally exist. There is evidence from the geological record on the Mauritanian continental margin that potentially large volumes of methane have been released as a result of the methane hydrate destabilisation due to past increases in ocean temperatures and this will have entered the oceans and perhaps the atmosphere. The release of methane from hydrates during a warming world has been suggested previously be an important mechanism for changing the chemistry of the oceans and amplifying climatic change.The proposed project here will identify candidate scientific drilling sites to investigate the potential contribution that different climatic changes and different escape pathways might have on methane hydrate systems. The International Ocean Drilling Programme (IODP) is focused on addressing key questions about the Earth's history, in particular, understanding the connections between components of the Earth systems. This project will identify specific sites where scientific ocean drilling could provide the required data to understand in detail, the distribution of gas hydrates and how such a system responds to climatic shifts.

大量甲烷（一种强效温室气体）储存在大陆边缘的浅水区（例如<500m）。这些被称为甲烷水合物的沉积物广泛分布在大陆边缘，被认为是天然存在的最大的甲烷储层之一。毛里塔尼亚大陆边缘的地质记录有证据表明，由于过去海洋温度升高导致甲烷水合物不稳定，可能释放出大量甲烷，这些甲烷可能会进入海洋，甚至可能进入大气。此前曾有人认为，世界变暖期间水合物中甲烷的释放是改变海洋化学和加剧气候变化的重要机制。这里提出的项目将确定候选科学钻探地点，以调查不同气候变化和气候变化的潜在贡献。甲烷水合物系统可能有不同的逃逸途径。国际海洋钻探计划（IODP）致力于解决有关地球历史的关键问题，特别是了解地球系统组成部分之间的联系。该项目将确定科学海洋钻探可以提供所需数据的具体地点，以详细了解天然气水合物的分布以及此类系统如何应对气候变化。