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

摘要ATM-9421041 Leavitt，Steven亚利桑那大学标题：美国西南部树木年轮同位素组成作为古降水和古气候同位素组成的替代 本研究的目的是定义同位素组成（delD，del 18 O，del 13 C）与仪器气候数据和降水的实际同位素测量的树木年轮测量之间的关系。 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。 树木的delD和del 18 O将根据图森附近降水的同位素组成的长期记录（12年）进行校准，并使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和气候/源水变量之间的联系可以用来探索仪器期之前的时期，以确定降水源的时空变异和强度。

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.