Forcing Mechanisms of Tropical Continental Climate: Deciphering a 100 kyr Record of Limnological Change from Lake Tanganyika Sediment Cores

热带大陆气候的强迫机制：破译坦噶尼喀湖沉积物核心的 100 kyr 湖沼变化记录

• 批准号: 9809526
• 负责人: Christopher Scholz
• 金额: $ 4.21万
• 依托单位: University of Miami
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-08-01 至 1998-11-09
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9809526&HistoricalAwards=false
• 关键词: Forcing; Mechanisms; Tropical; Continental; Climate

This award supports a project to develop a detailed geochronology and to conduct reconnaissance paleolimnological proxy analyses on a unique suite of six sediment cores from an isolated, slow-sedimentation rate, interbasinal ridge in Lake Tanganyika, East Africa. Initial work suggests that sedimentation rates at this locality are an order of magnitude slower than any other site cored in the African rift valley lakes, and the oldest sediments in these cores may be as much as 100,000 years in age. No comparable high-quality, high-resolution, continuous paleoclimate records of such duration are available for the interior of equatorial Africa. Scientists will examine evidence of a 10 kyr "double" precessional cycle in the Lake Tanganyika paleolimnological record and to what extent the tempo of Northern Hemisphere ice volume fluctuation dominates the Lake Tanganyika system. This project is being conducted under the auspices of the IDEAL program (International Decade for the East African Lakes).

该奖项支持一个项目，以制定详细的地质年代学，并进行侦察古湖泊代用品分析的一套独特的六个沉积物岩心从一个孤立的，沉积速率慢，盆地间脊在坦噶尼喀湖，东非。初步研究表明，该地点的沉积速率比非洲裂谷湖泊中任何其他地点的沉积速率都要慢一个数量级，这些岩心中最古老的沉积物可能长达10万年。 没有可比的高质量，高分辨率，连续的古气候记录的时间为赤道非洲内陆。科学家们将研究坦噶尼喀湖古湖泊记录中10 kyr“双”岁差周期的证据，以及北方半球冰量波动的克里思在多大程度上主导坦噶尼喀湖系统。 该项目在东非湖泊国际十年方案的主持下进行。