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

秘鲁和玻利维亚的的喀喀湖的高分辨率跨冰期古气候记录

• 批准号: 0317539
• 负责人: Mark Bush
• 金额: $ 26.4万
• 依托单位: Florida Institute of Technology
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-01 至 2006-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0317539&HistoricalAwards=false
• 关键词: Fine; Resolution; Transglacial; Paleoclimate; Record

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.

该奖项将产生的喀喀湖的花粉和木炭记录。将以60-80年分辨率对岩心LT 01 -2B（被认为是跨越过去14万年的连续沉积序列）的选定部分进行采样。将在秘鲁和玻利维亚海拔3000至5000米的湖泊上进行现代模拟花粉和木炭沉积的研究。将从80个湖泊中收集样本，记录周围的植被、火灾证据、湿地植物和基本湖沼学数据。这一部分的研究应该加强其他南半球古气候重建。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，包括来自新热带地区的完整全新世序列。核心LT 01 -2B将是多代理合作研究的中心，以建立的的喀喀盆地的古气候变化。化石花粉和木炭将是主要的非古湖沼重建，因此提供了独特的数据，植被和火灾的历史，周围的分水岭，侧翼沼泽和淹没水生植被。这些数据也将提供一个独立的评估，从同位素或硅藻数据推断的古气候事件。该奖项将提供来自高生物多样性地区的重要孢粉学数据，该地区面临未来全球气候变化的相当大的风险。了解该地区现代花粉的生态偏好，并了解过去由于气候变化而发生的变化，对于了解生物对未来南半球气候变化的反应至关重要。