Aerosol Deposition to Grass

本项目是利用微气象技术和高频气溶胶测量对大气气溶胶对草地的通量进行实地研究。气溶胶大小光谱由高流速传感器的粒子浓度光学测量和声波风速测量的风速数据组成，将从野外塔收集，用于使用涡流相关法确定湍流通量。通量估计也将根据气溶胶浓度的垂直分布线图得出。将研究与气溶胶计数统计和吸湿生长对气溶胶通量的影响有关的不确定性。该项目的主要目标是确定气溶胶沉积速度（通量/浓度）作为直径、摩擦速度和稳定性的函数。这些通量测量将有助于确定控制气溶胶命运的关键物理和化学过程，并有助于在区域和全球模式中对气溶胶去除进行参数化。

This project is a field study of fluxes of atmospheric aerosol to grass using micrometeorological techniques and high frequency aerosol measurements. Aerosol size spectra consisting of optical measurements of particle concentration from a high flow rate sensor and wind velocity data from sonic anemometry will be collected from field towers for determining turbulent fluxes using eddy correlation. Fluxes estimates will also be derived from vertical profiles of aerosol concentration. Uncertainties associated with aerosol counting statistics and the effect of hygroscopic growth on aerosol fluxes will be investigated. The primary goal of this project is the determination of the aerosol deposition velocity (flux/concentration) as a function of diameter, friction velocity, and stability. These flux measurements will help determine the key physical and chemical process controlling the fate of aerosols, and aid in the parameterization of aerosol removal in regional and global models.