Vegetation and Fire History of Deglaciation Around Lake Titicaca, Peru/Bolivia

该奖项支持对花粉和木炭进行精细分辨率分析的计划，特别强调解决在喀喀湖发生的年轻仙女座事件。到目前为止，最令人信服的证据表明，一系列气候振荡与欧洲和北大西洋的博林/阿拉罗德和年轻的仙女木相似，来自玻利维亚的萨哈马冰芯。附近的喀喀湖是一个适合测试萨哈马记录的地方。喀喀湖是一个有着古老沉积物的深湖，但在这个湖中，所有以前的核心都存在着16,000到9,000年前的间歇期。NE98-1PC岩心是从170米深的水中升起的，包含了过去23,000年来第一个连续的沉积序列。其他合作者正在研究一系列的替代物，这项提案寻求资金，为这个核心提供化石花粉和木炭数据。这些数据将提供玻利维亚高原植被运动、火灾和推断气候变化的第一个连续记录。事实上，它们将成为赤道以南新热带地区至冰川盛期的两到三个连续沉积记录之一。

AbstractThis award supports plans to conduct a fine-resolution analysis of both pollen and charcoal, placing special emphasis on resolving the presence of a Younger Dryas style event at Lake Titicaca. To date, the most convincing evidence for a set of climatic oscillations that parallel the Bolling/Allerod and Younger Dryas of Europe and North Atlantic comes from the Sajama ice core, Bolivia. A site that lends itself to testing the Sajama record is the nearby Lake Titicaca. Titicaca is an deep lake with ancient sediments, but one in which a hiatus at 16,000 to 9,000 years ago exists in all previous cores. Core NE98-1PC was raised from 170 m of water and contains the first continuous sedimentary sequence covering the last 23,000 years. Other collaborators are working on a wide array of proxies, and this proposal seeks funds to provide fossil pollen and charcoal data for this core. These data would provide the first continuous record of vegetation movement, fire, and inferred climate change from the Bolivian Altiplano. Indeed, they would become one of two or three continuous sedimentary records from the neotropics south of the equator that date to the glacial maximum.