Collaborative Research: Lake Bosumtwi, Ghana: High-Resolution Paleoclimatology and Seismic Reflection Site Survey

摘要ATM-9816830 Scholz，Christopher A. 迈阿密大学题目：加纳博萨姆特维湖：高分辨率古气候学和地震反射现场勘测 加纳的博苏姆特维湖是古环境研究的重要而独特的资源。 已经证明了湖Bosumtwi沉积物的价值重建百年到千年尺度的西非季风的变化。 分层计数和辐射数据证明，过去1000年的Bosumtwi沉积物记录是年度层压（varved），因此理想的重建和理解年际到百年尺度的气候变率在非洲的广大地区继续没有其他这样的记录。 该奖项支持一个项目，开展实地和实验室工作，以产生西非季风和萨赫勒干旱的第一个年度分层连续记录，可追溯到几个世纪甚至几千年。 这一记录将被用来测试北大西洋的变化和西非降雨量之间的关系，已经假设单独使用短仪器记录。 由于其独特的地理位置、气候敏感性和古环境潜力，博苏姆特维湖已被国际古环境界确定（即，IGBP-PAGES 过去的全球变化和ICDP国际大陆钻探计划）作为科学钻探的高度优先事项。 该项目将进行详细的高分辨率单道和中分辨率地震反射调查，以制定科学的最佳和安全的钻井计划。

Abstract ATM-9816830 Scholz, Christopher A. University of Miami Title: Lake Bosumtwi, Ghana: High-Resolution Paleoclimatology and Seismic Reflection Site Survey Lake Bosumtwi, Ghana, is an important and unique resource for paleoenvironmental research. The value of the Lake Bosumtwi sediments has been demonstrated for reconstructing centennial to millennial-scale variations of the West African monsoon. Lamination counts and radiometric data prove that the last 1000 years of the Bosumtwi sediment record is annually-laminated (varved), and thus ideal for reconstructing and understanding interannual to centennial-scale climate variability in a vast area of Africa continuing no other such record. This award supports a project to carry out the field and laboratory work needed to produce the first annually-laminated continuous record of the West African Monsoon and Sahel drought extending back centuries and perhaps millennia. This record will be used to test relationships between North Atlantic variability and West African rainfall that have been hypothesized using the short instrumental record alone. Because of its unique location, climate sensitivity and paleoenvironmental potential, Lake Bosumtwi has been identified by the international paleoenvironmental community (i.e., IGBP-PAGES Past Global Changes and ICDP International Continental Drilling Programme ) as a high priority for scientific drilling. This project will conduct the detailed high-resolution single-channel and intermediate-resolution seismic reflection survey needed to plan a scientifically-optimal and safe drilling program.