Derivation and Analysis of Climatic Information From Tree Rings

Am-9406732雅各比，Gordon C.Cook，Edward R.D‘Arrigo，Rosanne D.Columbia University，Lamont-Doherty地球观测站标题：从树轮获得气候信息该奖项支持Lamont-Doherty地球观测站树轮实验室的树枝气候研究。对老树生长年轮的分析为确定过去气候的季节性和年复一年的变化以评估最近的气候变化提供了几乎唯一的工具。大规模重建和当地研究表明，在过去的一个世纪里，气候异常变暖，偶尔发生气候突变，更普遍的极端天气发生在干旱和潮湿的事件中。目前的努力将更新和提高对气候敏感的森林交错带地点的复盖率，增加对湿度应力变化的采样，并纳入亚化石材料，以将树木年轮记录进一步延伸到过去。这一延长对于比较现在的、可能是人为的、更温暖的时期与更遥远的过去的自然更温暖的时期至关重要。

Abstract ATM-9406732 Jacoby, Gordon C. Cook, Edward R. D'Arrigo, Rosanne D. Columbia University, Lamont-Doherty Earth Observatory Title: Derivation and Analysis of Climatic Information from Tree Rings This award supports dendroclimatic research at the Tree-Ring Laboratory (TRL) at the Lamont-Doherty Earth Observatory. Analysis of growth rings of old-aged trees provides an almost unique tool for determining seasonal and year-by-year variations of past climate to evaluate recent climatic changes. Large-scale reconstructions and local studies show unusual warming in the past century, occasional abrupt climatic changes, and more prevalent extremes in dry and wet events. The current effort will update and improve the coverage of climatically-sensitive forest-ecotone sites with the addition of sampling for moisture stress variations and inclusion of subfossil material to extend the tree-ring record farther into the past. This extension is crucial for comparison of the present, possibly anthropogenic, warmer period to natural warmer periods of the more distant past.