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).

我们调查中中新世“蒙特雷事件”（文森特和伯杰，1985年），一个积极的碳同位素偏移4.5我的持续时间，为了有助于更好地了解控制碳在陆地，大气和海洋水库的分布过程。这种在极端温暖时期的δ 13 C漂移归因于北方太平洋边缘有机碳的增强固存（同前）。我们的目标是澄清远洋沉积物是否也反映了可能导致δ 13 C变化的生产力增加。如果是这样的话，我们进一步的目标是确定营养素的来源，负责450万年。在全球生产力提高的时期。最后，我们的目标是调查生产率的变化是否可以与pCO2大气压的变化（如帕加尼等人提出的）。（1999）），利用D. Groecke（δ13Ccarb和δ13Corg之间的分馏）。