Planktic foraminifers in the North Atlantic region: a revised approach to paleoclimatic reconstructions

北大西洋地区的浮游有孔虫：古气候重建的修订方法

• 批准号: 5392703
• 负责人: Professor Dr. Jörn Thiede (†)
• 金额: --
• 依托单位: Akademie der Wissenschaften und der Literatur Mainz
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2002
• 资助国家: 德国
• 起止时间: 2001-12-31 至 2009-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5392703?language=en
• 关键词: Planktic; foraminifers; North; Atlantic; region

The proposed work will focus on reconstructing glacial-interglacial and centennial to milleannial-scale climate variability in the North Atlantic ocean and Nordic seas during the late Quaternary. Investigations will be based on planktic foraminiferal diversity with emphasis on alternative methods that were not broadly employed before. These include consideration of rare species for paleoenvironmental interpretations; a study of climate variability in the Nordic seas taking into account the relative abundance of small-sized T. quinqueloba (size-fraction 100µm) in order to unveil fluctuations in the advection of Atlantic water masses during intervals other than pronounced interglaciations; an investigation of the surface water structure in the North Atlantic using the stable isotope signature of planktic foraminiferal species having different calcification depth to interpret intra-interglacial climate variability.

拟议的工作将侧重于重建晚第四纪期间北大西洋和北欧海洋的冰川间冰期和百年至千年尺度的气候变率。调查将以南极有孔虫多样性为基础，重点是以前没有广泛采用的替代方法。这些措施包括考虑稀有物种的古环境解释，在北欧海洋气候变化的研究，考虑到相对丰富的小型T。quinqueloba（粒度100µm），以揭示在明显的间冰期以外的间隔期间大西洋水团平流的波动;利用具有不同钙化深度的南极有孔虫物种的稳定同位素特征对北大西洋地表水结构进行调查，以解释间冰期内的气候变化。