Fine Resolution Transglacial Paleoclimate Record from Lake Titicaca, Peru and Bolivia

该奖项将产生喀喀湖的花粉和木炭记录。核心LT01-2B（被认为是跨越过去14万年的连续沉积序列）的选定部分将以60-80年的分辨率进行采样。一项关于现代模拟花粉和木炭沉积的研究将在秘鲁和玻利维亚海拔3000至5000米的湖泊上进行。将从80个湖泊中采集样本，记录周围植被、火灾证据、湿地植物和基本的湖泊学数据。这一组成部分的研究应加强南半球其他古气候重建。的的喀喀湖是南美洲最大的湖泊，提供了第一个不间断的跨冰川记录，其中包括来自新热带的完整的全新世序列。LT01-2B岩芯将成为建立的的喀喀湖盆地古气候变化的多代理合作研究中心。化石花粉和木炭将成为主要的非古湖泊重建，从而为周围流域、侧翼沼泽和淹没水生植被的植被和火灾历史提供独特的数据。这些数据还将提供对从同位素或硅藻数据推断出的古气候事件的独立评估。该奖项将为未来全球气候变化风险较大的高生物多样性地区提供重要的孢粉学数据。了解该地区现代花粉的生态偏好，了解过去由于气候变率而发生的变化，是了解未来南半球气候变化的生物响应的基础。

This award will generate a pollen and charcoal record from Lake Titicaca. Selected portions of core LT01-2B (believed to be a continuous sedimentary sequence spanning the last 140,000 years) will be sampled at 60-80 year resolution. A study of modern analog pollen and charcoal deposition will be conducted on lakes between 3000 and 5000 m elevation in Peru and Bolivia. Samples will be collected from 80 lakes, notes will be taken on the surrounding vegetation, evidence of fire, wetland plants, and basic limnological data. This component of the research should strengthen other southern hemisphere paleoclimate reconstructions. Titicaca is the largest lake in South America and offers the first uninterrupted transglacial record that includes a full Holocene sequence from the Neotropics. Core LT01-2B will be the center for multiproxy collaborative research to establish paleoclimatic change in the Titicaca basin. The fossil pollen and charcoal will be the principal non-paleolimnological reconstruction and hence provide unique data on the vegetation, and fire history of the surrounding watershed, the flanking marshes, and submerged aquatic vegetation. These data will also provide an independent assessment of paleoclimatic events deduced from isotopic or diatom data. This award will provide important palynological data from a region of high biodiversity at considerable risk from future global climate change. Understanding the ecological preferences of modern pollen in the region and knowing what changes took place in the past due to climate variability are fundamental to understanding the biotic response to future southern hemisphere climate change.