Collaborative Research: High-Resolution Paleoclimatology from Newly Acquired Sediment Cores from Lake Bosumtwi, Ghana

合作研究：从加纳博苏姆特维湖新采集的沉积物岩心进行高分辨率古气候学

• 批准号: 0117414
• 负责人: John King
• 金额: $ 7.99万
• 依托单位: University of Rhode Island
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2001
• 资助国家: 美国
• 起止时间: 2001-09-15 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0117414&HistoricalAwards=false
• 关键词: Collaborative; Research; Resolution; Paleoclimatology; Newly

This research will examine a suite of cores from Lake Bosumtwi, Ghana, for evidence of a high-resolution (i.e., interannual to millennial-scale) record of West African Monsoon dynamics over the last 20,000 years.Lake Bosumtwi is the remnant of a basin formed by a meteor impact approximately 1.1 million years ago. As such, the lake is a well-defined catchment basin that is sensitive to small changes in precipitation-evaporation balance, a fundamental aspect of climate.The research strategy is to use a multi-proxy approach to analyze cores recovered from the lake under previous NSF funding. Specifically, the researchers will develop annual resolution records of West African climate through the last 1,000 years, examine the record of West African monsoon variability through the last 20,000 years when climatic forcing functions were different than today, and establish detailed chronologies for sediments from the lake to examine abrupt climate change events in the region.

这项研究将研究加纳博苏姆特维湖的一套岩芯，以寻找过去20,000年来西非季风动态的高分辨率(即年际到千年尺度)记录的证据。博苏姆特维湖是大约110万年前流星撞击形成的盆地的残留物。因此，该湖是一个定义明确的集水区，对降水-蒸发平衡的微小变化很敏感，这是气候的一个基本方面。研究战略是使用多代理方法来分析在之前NSF资助下从该湖恢复的岩芯。具体地说，研究人员将开发西非过去1000年气候的年度分辨率记录，检查过去2万年气候强迫作用与今天不同的西非季风变化记录，并建立详细的湖泊沉积物年表，以研究该地区的突然气候变化事件。