Lake Titicaca: Toward a Detailed Record of Lake Quaternary Climate in Subtropical South America

摘要ATM-9624715罗伯特·威廉·马什·邓巴莱斯大学题目：喀喀湖：对南美洲亚热带第四纪气候的详细记录该奖项支持一项先导研究，该研究有两个操作目标：(1)对秘鲁/玻利维亚的喀喀湖进行高分辨率调查(2)从大而深的湖盆中回收几个短(3米)的活塞芯。这些岩心预计将跨越整个全新世和最新更新世。对岩心的分析将仅限于初步调查，包括利用放射性碳测年、沉积学、散体化学、稳定同位素地球化学以及硅藻和花粉的组成来确定堆积率。这项研究将确定长岩芯的最佳位置，并开始解决有关全新世和最新更新世南美洲亚热带气候记录的许多重要问题。喀喀湖是南美洲最重要的气候档案之一。对拟议岩心的恢复和初步分析将提供独特的、校准良好的具有广泛意义的古气候记录。

Abstract ATM-9624715 Dunbar, Robert William Marsh Rice University Title: Lake Titicaca: Toward a Detailed Record of the Quaternary Climate in Subtropical South America This award supports a pilot study that has two operational objectives: (1.) to undertake a high-resolution survey of Lake Titicaca, Peru/Bolivia and (2.) to recover several short (3 meters) piston cores from the large, deep basin of the lake. These cores are expected to span the entire Holocene and latest Pleistocene. Analysis of the cores will be limited to a preliminary survey, including determination of accumulation rates using radiocarbon dating, sedimentology, bulk chemistry, stable isotopic geochemistry, and composition of diatoms and pollen. This study will determine the best sites for location of the long cores and begin to address the many important questions about the climatic record of subtropical South America during the Holocene and latest Pleistocene. Lake Titicaca is one of the most important climatic archives in South America. The recovery and preliminary analysis of the proposed cores will provide unique, well-calibrated paleoclimatic records of wide-spread significance.