Tree-Ring Isotopic Composition as a Proxy for Isotopic Composition of Paleoprecipitation and Paleoclimate in the American Southwest

树轮同位素组成作为美国西南部古降水和古气候同位素组成的代理

• 批准号: 9421041
• 负责人: Steven Leavitt
• 金额: $ 15.89万
• 依托单位: University of Arizona
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-02-01 至 1998-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9421041&HistoricalAwards=false
• 关键词: Tree; Ring; Isotopic; Composition; Proxy

Abstract ATM-9421041 Leavitt, Steven University of Arizona Title: Tree-Ring Isotopic Composition as a Proxy for Isotopic Composition of Paleoprecipitation and Paleoclimate in the American Southwest This study is intended to define relationships between isotopic composition (delD, del18O, del13C) measured in tree-rings with instrumental climate data and actual isotopic measurements of precipitation. Stable-isotopic measurements will be made on cellulose of ponderosa pine from southeastern Arizona and southern New Mexico. The delD and del18O of the trees will be calibrated with respect to a long record (12 years) of isotopic composition of precipitation from nearby Tucson, extended with other precipitation isotopic data from the IAEA network. In the long term, the connection between the tree-ring measurements and climate/source-water variables established in this study can be used to explore periods preceding the instrumental period to determine the spatial and temporal variability and strength of precipitation sources.

摘要 ATM-9421041 Leavitt，亚利桑那州史蒂文大学 标题：树木年轮同位素组成作为美国西南部古降水和古气候同位素组成的代理 本研究旨在定义用仪器气候数据在树木年轮中测量的同位素组成（delD、del18O、del13C）与实际降水同位素测量之间的关系。 将对亚利桑那州东南部和新墨西哥州南部的黄松纤维素进行稳定同位素测量。 这些树的 delD 和 del18O 将根据图森附近降水同位素组成的长期记录（12 年）进行校准，并利用原子能机构网络的其他降水同位素数据进行扩展。 从长远来看，本研究中建立的树木年轮测量与气候/水源变量之间的联系可用于探索仪器周期之前的时期，以确定降水源的时空变化和强度。