Collaborative Research: P2C2--Reconstructing Changes in Asian Monsoon Circulation during the Last Millennium from Stable Isotopes in Tropical Tree Rings

该项目旨在对亚洲季风大气环流强度进行千年长的估计，并从越南和老挝长寿的东南亚针叶树的重复、每年分辨的稳定氧同位素(ä18-O)时间序列中推断过去季风环流的可变性。这项研究利用了之前得到支持的一项初步研究，该研究表明，该物种的树木年轮ä18-O响应与气候动力学一致的亚洲季风环流的大范围模式，已知的对降水稳定同位素的控制，以及包括同位素树状气候学研究在内的物理和化学机制。潜在的更广泛的影响包括支持本科生进行计划中的研究，并提供来自气候敏感地区的潜在重要的新数据档案。

This project seeks to develop millennium-length estimates of the strength of Asian monsoon atmospheric circulation and to infer variability in past monsoon circulation from replicated, annually-resolved stable oxygen isotope (ä18-O) time series from the long-lived southeast Asian conifer Fokienia hodginsii in Vietnam and Laos. The research leverages a previously supported pilot study that demonstrated that tree-ring ä18-O from this species in this region responds to broad-scale patterns of Asian monsoon circulation that are consistent with climate dynamics, known controls on the stable isotopes of precipitation, and the physical and chemical mechanisms comprising the study of isotope dendroclimatology.The potential broader impacts include supporting undergraduates in the planned research and providing a potentially important new archive of data from a climatologically sensitive region.