Dendrochronological and Stable Isotope Studies of Tree-Rings for Selected Areas of the United States

美国选定地区树木年轮的树木​​年代学和稳定同位素研究

• 批准号: 9628759
• 负责人: Xiahong Feng
• 金额: $ 24.09万
• 依托单位: Dartmouth College
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1996
• 资助国家: 美国
• 起止时间: 1996-06-01 至 2001-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9628759&HistoricalAwards=false
• 关键词: Dendrochronological; Stable; Isotope; Studies; Tree

Abstract ATM-9628759 Feng, Xiahong Dartmouth College Title: Dendrochronological and Stable Isotope Studies of Tree-Rings for Selected Areas of the United States Tree-ring techniques have been increasingly used for climate and paleoecological studies with time scales of hundreds to thousands of years. The record of stable isotopes in tree-rings may provide detailed information about present and past climate. This project is designed to study the climatic implications of stable isotopes in annual tree-rings and to address the basic analytical and interpretive issues related to this methodology. This award will address the signal-to-noise ratios of the isotopic records and the fundamental question of replication: can reasonably homogenous hydrogen and oxygen isotope chronologies be developed from several trees at a single site? The project will also focus on the effects of tree age and microenvironment on the derivation of climatically- sensitive isotope chronologies.

ATM-9628759冯，夏宏达特茅斯学院题目：美国选定地区树轮的树轮年代学和稳定同位素研究树轮技术已越来越多地被用于气候和古生态研究，时间尺度可达数百至数千年。年轮中稳定同位素的记录可以提供有关现在和过去气候的详细信息。该项目旨在研究年轮中稳定同位素对气候的影响，并解决与这一方法有关的基本分析和解释问题。该奖项将解决同位素记录的信噪比和复制的基本问题：能否从同一地点的几棵树开发出合理的同质氢和氧同位素年代学？该项目还将重点研究树龄和微环境对得出对气候敏感的同位素年表的影响。