Tree-Ring Analysis of Regional to Large-Scale Paleoclimate

区域到大范围古气候的树木年轮分析

• 批准号: 9222506
• 负责人: David Stahle
• 金额: $ 25.76万
• 依托单位: University of Arkansas
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-03-01 至 1996-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9222506&HistoricalAwards=false
• 关键词: Tree; Ring; Analysis; Regional; Large

This award supports the development of an array of millennium- long tree-ring chronologies for the southeastern USA. These long chronologies are sensitive to precipitation, and reflect anomalies in large-scale atmospheric circulation over eastern North American and the western North Atlantic. This work will also develop centuries-long chronologies in the southern Great Plains and Mexico which are sensitive to anomalies in the EL Nino/Southern Oscillation (ENSO), the most important known cause of interannual to decadal variation in global climate. The network of ENSO- sensitive tree-ring chronologies will be expanded in Mexico and the Southeast in order to develop longer ENSO reconstructions, to explore possible changes in the ENSO phenomenon during the Little Ice Age, and to estimate the frequency of ENSO extremes such as the 1982-83 warm event. The potential for dendroclimatology will also be explored in East Africa, where and ENSO influence on climate has been detected, but where long, annual climate proxies are not presently available. The proposed research will provide unique paleoclimatic data that will help define the natural variability of climate, and may help evaluate GCM-simulations of climate during global warm and cool episodes of the late Holocene.

该奖项支持一系列千年发展目标的发展- 美国东南部树木年轮年表 这些长 年表对降水敏感，反映了异常 北美东部大规模大气环流 和北大西洋西部。 这项工作还将发展 大平原南部和墨西哥长达几个世纪的编年史 对厄尔尼诺/南方气候异常敏感 振荡（ENSO），最重要的已知原因的年际变化 全球气候的年代际变化。 ENSO网络- 敏感的树木年轮年表将在墨西哥和 为了发展更长的ENSO重建， 探索厄尔尼诺现象可能的变化在小 冰川期，并估计ENSO极端事件的频率， 1982- 1983年的温暖事件。 树木气候学的潜力也将 在东非，ENSO对气候的影响 已经被检测到，但在长期，每年的气候代理没有 目前可用。 这项研究将提供独特的 古气候数据，这将有助于确定自然变化的 气候，并可能有助于评估GCM模拟气候期间 全新世晚期的全球暖期和冷期