The Mid-Miocene "Monterey Event": A global productivity increase?

中新世中期“蒙特利事件”：全球生产力提高？

• 批准号: 12795580
• 负责人: Professor Dr. Kay-Christian Emeis
• 金额: --
• 依托单位: Fachrichtung Gesellschaftswissenschaftliche Europaforschung
• 依托单位国家: 德国
• 项目类别: Infrastructure Priority Programmes
• 财政年份: 2005
• 资助国家: 德国
• 起止时间: 2004-12-31 至 2009-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/12795580?language=en
• 关键词: Mid; Miocene; Monterey; Event; global

We investigate the Mid-Miocene “Monterey Event” (Vincent and Berger, 1985), a positive carbon isotope excursion of 4.5 my duration, in order to contribute to a better understanding of the processes that control the distribution of carbon in the terrestrial, atmospheric and marine reservoirs. This δ13C excursion during a period of extreme warmth has been attributed to the enhanced sequestration of organic carbon in the margins of the northern Pacific ocean (op.cit.). We aim to clarify whether pelagic sediments also reflect increased productivity that might have contributed to the δ13C shift. If this is the case, we further aim to identify the sources of nutrients responsible for a 4.5 m.y. period of globally increased productivity. Finally, we aim to investigate if productivity variations can be related to pCO2atm variations (as proposed by Pagani et al.(1999)), by means of δ13C analyses of bulk marine organic matter in our samples by D. Groecke (fractionation between δ13Ccarb and δ13Corg).

我们研究了中新世“蒙特雷事件”（Vincent 和 Berger，1985），这是一次持续时间为 4.5 my 的正碳同位素偏移，以有助于更好地了解控制陆地、大气中碳分布的过程。极端温暖时期的δ13C偏移归因于北太平洋边缘有机碳的封存增强。 （上文引用）。我们的目标是澄清远洋沉积物是否也反映了可能导致 δ13C 变化的生产力的增加，如果是这样，我们的目标是确定全球 4.5 m.y 时期的营养物来源。最后，我们的目标是通过对大量海洋有机物进行 δ13C 分析来研究生产力变化是否与 pCO2atm 变化相关（如 Pagani 等人（1999）提出的）。我们的样品由 D. Groecke 提供（δ13Ccarb 和 δ13Corg 之间的分离）。