Mechanisms and time relationships of rapid climate change during the Lower Aptian OAE 1a in the southeastern North Atlantic: Gas hydrate deterioration?

北大西洋东南部阿普第阶 OAE 1a 期间气候快速变化的机制和时间关系：天然气水合物恶化？

• 批准号: 28791407
• 负责人: Dr. Peter Hofmann
• 金额: --
• 依托单位: Royal Netherlands Institute for Sea Research (NIOZ)
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2009-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/28791407?language=en
• 关键词: Mechanisms; time; relationships; rapid; climate

A key mechanism which controls rapid climate change during greenhouse periods of Mesozoic climate system is the catastrophic release of methane from gas hydrates to the oceanic and atmospheric carbon reservoirs. Excess CO2 liberated from gas hydrate desiccation is expected to result in the intensification of greenhouse conditions leading to an acceleration of the hydrological cycle, intensified weathering conditions, an elevated supply of nutrients to the ocean and extensive black shale deposition. In this project we intend to investigate the chain of processes induced by the rapid injection of CO2 to the atmosphereocean system exemplified by Oceanic Anoxic Event la (OAE la), in order to elucidate the feedback mechanisms and time relationships of the atmosphere-continent-ocean system. We propose to conduct a multi-proxy, high resolution study of OAE la at the Galicia Margin based on OOP Hole 641C .

中生代气候系统温室期控制快速气候变化的关键机制是天然气水合物甲烷向海洋和大气碳库的灾难性释放。从天然气水合物干燥中释放的过量二氧化碳预计将导致温室条件的加剧，从而导致水文循环加速、风化条件加剧、海洋营养供应增加和大量黑色页岩沉积。在本项目中，我们将以海洋缺氧事件la （OAE la）为例，研究由CO2快速注入大气-海洋系统所引起的过程链，以阐明大气-大陆-海洋系统的反馈机制和时间关系。我们提出基于OOP孔641C在加利西亚边缘进行多代理、高分辨率的OAE la研究。