A tropical perspective on ice-age cycles: Evidence for rapid climate transitions from East African paleolake records

冰河时代循环的热带视角：东非古湖记录中气候快速转变的证据

• 批准号: 18140335
• 负责人: Dr. Andreas Bergner
• 金额: --
• 依托单位: Berkeley Geochronology Center (BGC)
• 依托单位国家: 德国
• 项目类别: Research Fellowships
• 财政年份: 2006
• 资助国家: 德国
• 起止时间: 2005-12-31 至 2010-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/18140335?language=en
• 关键词: tropical; perspective; ice; age; cycles

This application proposes a two-year investigation on East African lake sediments in order to assess regional and global climate change related to ice-age dynamics. The application in terms reflects scientific disciplines of Environmental Sciences, Paleoclimatology, Paleontology, Geochronology and Geochemistry. The proposed scientific program focuses on high-resolution sedimentological and geochemical investigations of laminated sediment sections of Late Pleistocene (~135.000 yr) to Early Holocene (~10.000 yr) age. Based on diatom-transfer functions, X-ray microscanning, time-series analyses and 40Ar/39Ar-dating, sediments patterns reflecting rapid environmental change on annual to millennial timescales will be established. The approach therefore tries to evaluate the timing and amplitude of East African climate change during glacial/ interglacial transitions and the relative importance of tropical climate-instability patterns for ice-age dynamics.

这项申请提出了对东非湖泊沉积物进行为期两年的调查，以评估与冰期动态有关的区域和全球气候变化。术语的应用反映了环境科学、古气候学、古生物学、地质年代学和地球化学等科学学科。拟议的科学方案侧重于对晚更新世（~135.000年）至早全新世（~10.000年）的层状沉积物剖面进行高分辨率沉积学和地球化学调查。将根据沉积物转移函数、X射线显微扫描、时间序列分析和40 Ar/39 Ar测年法，确定反映每年至千年时间尺度上环境迅速变化的沉积物模式。因此，该方法试图评估东非气候变化的时间和幅度在冰期/间冰期过渡和热带气候不稳定模式的相对重要性的冰期动力学。