The Application of Tree-Ring Analysis to Reconstruct the Drought/Hydro-Climatic History of the West African Sahel

应用树木年轮分析重建西非萨赫勒地区的干旱/水文气候历史

• 批准号: 9906386
• 负责人: Malcolm Hughes
• 金额: $ 4.03万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-05-15 至 2001-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9906386&HistoricalAwards=false
• 关键词: Application; Tree; Ring; Analysis; Reconstruct

AbstractATM-9906386Hughes, Malcolm K.University of ArizonaTitle: The Application of Tree-Ring Analysis to Reconstruct the Drought/Hydro-Climatic History of the West African SahelThis study will explore the feasibility of using tree-ring analysis to extend the rainfall and runoff records and the time series of drought episodes in the Sahel of West Africa. Suitable woody plants species in the region will: Either form distinct annual rings, or contain other chronological markers that can be connected to external events of known date, Be found, either in the field, or in human artifacts, extending back into the preinstrumental period, Yield evidence, such as crossdating between growth rings in neighboring plants and those at more than one location, of a climate signal in the wood. The availability of these records will greatly enhance the capability to study decadal to multidecadal features of climate variability. The record of the major 1968-89 drought stands as stark testimony to the importance of such features in Sahelian climate. These records also complement the relatively small set of high-resolution proxy records currently available from the Tropics in general, and from Africa as a whole.

本文将探讨利用树木年轮分析来扩展西非萨赫勒地区降雨和径流记录以及干旱事件时间序列的可行性。 在该地区合适的木本植物物种将：要么形成独特的年轮，或包含其他时间标记，可以连接到已知日期的外部事件，被发现，无论是在外地，或在人类文物，延伸到preinstrumental时期，产量证据，如交叉生长轮之间的相邻植物和那些在一个以上的位置，在木材中的气候信号。 这些记录的可用性将大大提高研究气候变率的十年到多年特征的能力。 1968- 1989年的重大干旱记录清楚地证明了这些特征在萨赫勒气候中的重要性。 这些记录还补充了目前从热带地区和整个非洲获得的相对较小的高分辨率代用记录。