Extending coupled cryptotephra and palaeoclimatic analysis of marine cores to the Eastern Mediterranean over the last ~200ka

在过去约 200ka 中将海洋岩心的隐壳和古气候耦合分析扩展到东地中海

• 批准号: 2235777
• 金额: --
• 依托单位: Royal Holloway University of London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2019
• 资助国家: 英国
• 起止时间: 2019 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2235777
• 关键词: Extending; coupled; cryptotephra; palaeoclimatic; analysis

This study aims to improve the chronological resolution at which we currently understand past climates in the Eastern Mediterranean over the last 200 000 years. Climate records will be created through the geochemical analysis of a marine sediment sequence obtained from the Eastern Mediterranean, 60km south of Cyprus. Tephra (small shards of volcanic glass within the sediment) will be used to date these records of past climate, and develop a timeline of past climate events in the region by correlation with known and dated eruptions. The chemistry of the tephra will be matched to past volcanic eruptions of known ages, giving an age to the point in the climate record in which the tephra is found. Tephra will then be matched by geochemical composition to archaeological sites that show evidence of early modern humans in the Levant and Arabia, in order to determine the climatic conditions under which early humans migrated out of Africa.

这项研究的目的是提高时间分辨率，我们目前了解过去的气候在东地中海在过去的20万年。将通过对塞浦路斯以南60公里的东地中海海洋沉积物序列进行地球化学分析，创造气候记录。火山灰（沉积物中的火山玻璃小碎片）将用于确定这些过去气候记录的日期，并通过与已知和日期确定的火山爆发的相关性，制定该地区过去气候事件的时间轴。火山灰的化学成分将与过去已知年代的火山喷发相匹配，从而确定火山灰出现的气候记录的年代，然后将火山灰的地球化学成分与在黎凡特和阿拉伯半岛发现早期现代人类证据的考古遗址相匹配，以确定早期人类迁移出非洲的气候条件。