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

拟议的研究将继续为中国和美国的空/海实验进行的研究。对地面采样收集到的气溶胶粒子进行分析(1)确定空气中颗粒物物质的自然和人为成分；(2)研究大气粉尘浓度的时间变化和造成浓度差异的气象条件；(3)估算矿物气溶胶和选定微量元素在东亚周边海域的大气沉降速率。新的计划将集中在与全球气候变化有关的土壤大气运输上，并将当代气溶胶颗粒的化学成分与中国黄土的化学成分进行比较和对比。将使用配备微量分析仪的扫描电子显微镜来研究单个气溶胶颗粒的形态和化学性质，并将这些数据与用级联撞击器获得的质量颗粒大小分布进行比较。选定的黄土和气溶胶样品将使用x射线衍射法进行分析，以确认单个颗粒分析和比较矿物学研究。最后，单个颗粒的化学数据将用于评价矿物粉尘与人为物质之间的某些化学反应。

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.