Holocene climatic variability and evolution of human settlement in the Aral Sea Basin

咸海盆地全新世气候变化与人类住区演化

• 批准号: 5360142
• 负责人: Privatdozentin Dr. Hedi Oberhänsli
• 金额: --
• 依托单位: Museum für Naturkunde - Leibniz-Institut für Evolutions- und Biodiversitätsforschung (MfN)
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2001
• 资助国家: 德国
• 起止时间: 2000-12-31 至 2005-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5360142?language=en
• 关键词: Holocene; climatic; variability; evolution; human

Climatic fluctuations in this arid/semi-arid area will be documented for the past 10-15 ka. The study will be pased on a balanced high resolution data set consisting of biotic and abiotic parameters or proxies (detailed lithology, magnetic susceptibility, diatoms, ostracods, molluscs, pollen, grain size distribution, major and minor elements, mineralogy, stable isotops) from continous sediment cores. The proxies will be used to trace hydrological changes in the water column as responses to changing water supply to the Aral Sea. The age model for sediment cores will be built on paleomagnetic rock magnetic measurements which will be related to well dated changes of the geomagnetic field during the past. Recent sediments deposited within the last 150 years will be accurately dated using the technique of 210-Pb. Further carbon-14 AMS dating on carbonaceous fossils like ostracods and molluscs will be used. Core locations will be selected based on results of a preceding seismic survey. Geomorphologic fieldwork in the W, SE and NE Aral Basin will provide information on position of the shoreline, terraces and soil horizons in the past. Archeological prospecting will shed lights on settlement patterns and structures. Remote sensing at different spatial resolution will support geomorphologic and archeological fieldwork. Conventional C-14 will be used for dating terraces, old shorelines and archeological sites.

在这个干旱/半干旱地区的气候波动将记录在过去的10-15万年。这项研究将以一套平衡的高分辨率数据为基础，其中包括来自连续沉积物岩心的生物和非生物参数或代用指标（详细的岩性、磁化率、硅藻、介形虫、软体动物、花粉、粒度分布、主要和次要元素、矿物学、稳定同位素）。这些代用指标将用于追踪水体中的水文变化，作为对咸海供水变化的反应。沉积岩芯的年龄模型将建立在古磁性岩石磁性测量的基础上，这些测量将与过去地磁场的日期变化有关。最近150年内沉积的现代沉积物将使用210-Pb技术精确定年。进一步的碳-14 AMS测年将用于碳质化石，如介形虫和软体动物。岩心位置将根据先前地震勘测的结果进行选择。在咸海盆地西部、东南部和东北部进行的地貌实地考察将提供有关过去海岸线、阶地和土层位置的信息。考古勘探将揭示定居模式和结构。不同空间分辨率的遥感将支持地貌和考古实地工作。传统的C-14将用于确定阶地、老海岸线和考古遗址的年代。