Centennial to millennial scale climate change and low-latitude oxygen minimum conditions (A06)

百年至千年规模的气候变化和低纬度最低氧气条件（A06）

• 批准号: 58754715
• 金额: --
• 依托单位: GEOMAR Helmholtz-Zentrum für Ozeanforschung Kiel
• 依托单位国家: 德国
• 项目类别: Collaborative Research Centres
• 财政年份: 2008
• 资助国家: 德国
• 起止时间: 2007-12-31 至 2018-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/58754715?language=en
• 关键词: Centennial; millennial; scale; climate; change

We study the control mechanisms that caused changes in the Oxygen Minimum Zone (OMZ) in the eastern tropical South Pacific under significantly different climatic conditions from the last Glacial to the pre-anthropogenic Late Holocene. This is a prerequisite to separate human-induced perturbations from those caused by natural climate variability. For this purpose we will on one hand reconstruct variations in OMZ intensity in its centre at highest time resolution for the past 5,000 years and on the other investigate changes in the sensitive suboxic OMZ margins for the past 20,000 years based on well-established redox-sensitive proxies.

我们研究的控制机制，导致在热带南太平洋东部的氧最小区（OMZ）的变化显着不同的气候条件下，从最后一个冰期到前人类活动的晚全新世。这是将人为扰动与自然气候变异造成的扰动区分开来的先决条件。为此，我们将一方面重建OMZ强度的变化在其中心在最高的时间分辨率在过去的5,000年，另一方面调查的变化在敏感的亚氧OMZ利润率在过去的20,000年的基础上，完善的氧化还原敏感的代理。