Studies of the Relationship between the Climatic Tempera- tures and the D/H and 13C/12C Ratios in Trees, with PossibleApplications for Retrieval of the Earth's Past Climates

研究气候温度与树木 D/H 和 13C/12C 比率之间的关系，以及反演地球过去气候的可能应用

• 批准号: 9219891
• 负责人: Samuel Epstein
• 金额: $ 24.99万
• 依托单位: California Institute of Technology
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1993
• 资助国家: 美国
• 起止时间: 1993-05-01 至 1996-04-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9219891&HistoricalAwards=false
• 关键词: Studies; Relationship; between; Climatic; Tempera

This award supports a project designed to establish the relationship between environmental temperature and the Deuterium/Hydrogen (D/H) ratio in unexchangeable hydrogen in cellulose extracted from trees from locations covering a wide range of climatic conditions. The project will ascertain to what degree factors other than temperature affect the Deuterium/Hydrogen (D/H) ratio. Among these might be humidity, growth history, the nature of the root system and its relationship to the source water used by the trees, and generally the relationship between the D/H ratio in cellulose and the hydrology of the area. The collecting sites are located in Oregon, California, and Manitoba, Canada. The resolution of these factors will allow the retrieval of climatic information from many trees from different locations. The Deuterium/Hydrogen records currently indicate unexpectedly that the rate of global warming is greater in the 19th century than in the 20th century. This is contrary to what is expected if global warming were directly related to the increase in atmospheric C02. The confirmation of this result is critical to our understanding of the role that C02 plays in affecting the earth's climate.

该奖项支持一个旨在建立 环境温度与 氘/氢（D/H）在不可交换氢中的比例 从广泛地区的树木中提取的纤维素 的气候条件。 该项目将确定在何种程度上 温度以外的因素影响氘/氢（D/H） 比例 其中可能包括湿度，生长历史， 根系及其与水源水的关系 树木，以及一般的D/H比之间的关系， 纤维素和该地区的水文。 收集地点是 位于俄勒冈州、加州和加拿大的马尼托巴。 的 这些因素的分辨率将允许检索气候 来自不同地点的许多树木的信息。 的 氘/氢记录目前意外地表明， 全球变暖的速度在世纪比在19世纪更大。 世纪。 这与预期相反，如果全球 气候变暖与大气CO2的增加直接相关。 这一结果的确认对于我们理解 二氧化碳在影响地球气候方面所起的作用。