Aerosol Deposition to Grass

气溶胶沉积到草上

• 批准号: 9907765
• 负责人: Richard Vong
• 金额: $ 33.73万
• 依托单位: Oregon State University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1999
• 资助国家: 美国
• 起止时间: 1999-09-15 至 2004-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9907765&HistoricalAwards=false
• 关键词: Aerosol; Deposition; Grass

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.

该项目是利用微气象技术和高频气溶胶测量对大气气溶胶到草的通量进行的实地研究。 气溶胶粒径谱由高流速传感器的颗粒浓度光学测量值和声波风速计的风速数据组成，将从现场塔收集，用于使用涡动相关确定湍流通量。 还将从气溶胶浓度的垂直分布图中得出通量估计数。 与气溶胶计数统计和吸湿增长对气溶胶通量的影响相关的unexplored将进行调查。 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型中确定气溶胶清除的参数。