Earth Sciences Postdoctoral Research Fellowship Award

地球科学博士后研究奖学金

• 批准号: 9505226
• 负责人: Libby Stern
• 金额: $ 7.2万
• 依托单位: Fellowships
• 依托单位国家: 美国
• 项目类别: Fellowship Award
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-06-01 至 1999-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9505226&HistoricalAwards=false
• 关键词: Earth; Sciences; Postdoctoral; Research; Fellowship

EAR-9525336 Stern, Libby A. The oxygen and hydrogen isotope systematics of non-carbonate minerals in altitudinal transects will be compared with oxygen isotope values of cogenetic calcite and meteoric water. These data will: (1) quantify the isotopic effects of soil water evaporation, and (2) test which soil minerals are more useful as climate indicators. The assumption behind the method is that soil minerals record the isotopic composition of meteoric water at the time of their formation. The oxygen isotope value of pedogenic calcite has been used as a proxy for climate, but the climate record preserved in other soil minerals is largely unexplored. Because calcite does not form in soils in relatively humid climates, this work, if successful, will greatly expand the environments in which climatic indicators can be utilized.

Stern，Libby A. 在垂直断面的非碳酸盐矿物的氧和氢同位素系统将与同生方解石和大气降水的氧同位素值进行比较。 这些数据将：（1）量化土壤水分蒸发的同位素效应，（2）测试哪些土壤矿物质作为气候指标更有用。 该方法背后的假设是，土壤矿物记录了形成时大气降水的同位素组成。 成壤方解石的氧同位素值已被用作气候的代用指标，但保存在其他土壤矿物中的气候记录在很大程度上尚未探索。 由于方解石不会在相对潮湿气候的土壤中形成，这项工作如果成功，将大大扩大气候指标可以利用的环境。