The Biogeochemical Cycling of Atmospheric Trace Elements and Mineral Aerosol Over Central and Eastern Asia

中亚和东亚大气微量元素和矿物气溶胶的生物地球化学循环

• 批准号: 9114072
• 负责人: Richard Arimoto
• 金额: $ 30.77万
• 依托单位: University of Rhode Island
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1991
• 资助国家: 美国
• 起止时间: 1991-09-01 至 1995-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9114072&HistoricalAwards=false
• 关键词: Biogeochemical; Cycling; Atmospheric; Trace; Elements

The proposed studies will continue research undertaken for the China and America Air/Sea Experiments. Aerosol particles collected through ground-based sampling are analyzed (1) to determine the natural and anthropogenic components of the airborne particulate material, (2) to investigate the temporal variability in atmospheric dust concentrations and the meteorological conditions responsible for the concentration differences, and (3) to estimate the atmospheric deposition rates of mineral aerosol and selected trace elements to the waters bordering eastern Asia. New initiatives will focus on the atmospheric transport of soils as it relates to global climatic change, and the chemistry off contemporary aerosol particles will be to compared and contrasted with that of loess from China. The morphology and chemistry of individual aerosol particles will be investigated through the use of a scanning electron microscope equipped with a microanalyzer, and these data will be compared with the mass-particle size distributions obtained with cascade impactors. Selected loess and aerosol samples will be analyzed using x-ray diffractometry for confirmation of the individual particle analyses and for comparative mineralogical studies. Finally, the chemical data for the individual particles will be used to evaluate certain chemical reactions between the mineral dust and anthropogenic substances.

拟议的研究将继续进行研究， 中美海空实验。 气溶胶粒子 对通过地面采样收集的数据进行分析（1）， 确定自然和人为的组成部分， 空气中的颗粒物质，（2）调查时间 大气尘埃浓度的变化和 气象条件负责浓度 差异;（3）估算大气沉积速率 矿物气溶胶和选定的微量元素的沃茨 与东亚接壤。 新举措将重点关注 与全球气候有关的土壤大气迁移 变化，当代气溶胶颗粒的化学成分将 与中国黄土的对比。 的 单个气溶胶颗粒的形态和化学性质将被 通过使用扫描电子显微镜进行研究 配备了微量分析仪，这些数据将被比较， 通过级联获得质量-颗粒尺寸分布 撞击物 将对选定的黄土和气溶胶样品进行分析 使用X射线衍射法确认个体 颗粒分析和比较矿物学研究。 最后，单个颗粒的化学数据将是 用于评估矿物之间的某些化学反应 灰尘和人为物质。