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

摘要ATM-9527418 Baker，Paul A. 杜克大学题目：的的喀喀湖：南美洲亚热带第四纪气候的详细记录 该奖项支持试点研究，有两个业务目标：（1）。对秘鲁/玻利维亚的的喀喀湖进行高分辨率调查，以及（2.）从湖的大而深的盆地中回收几个短的（3米）活塞岩心。 这些岩心预计将跨越整个全新世和最新更新世。 对岩芯的分析将限于初步调查，包括利用放射性碳测年、沉积学、整体化学、稳定同位素地球化学以及硅藻和花粉的组成来确定积累率。 这项研究将确定最佳地点的位置长的核心和开始，以解决许多重要的问题，气候记录的亚热带南美洲在全新世和最新更新世。 的的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具有广泛意义的独特、校准良好的古气候记录。

Abstract ATM-9527418 Baker, Paul A. Duke 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.