RUI: Development of a Fixed Frequency Aerosol Albedometer

RUI：固定频率气溶胶反照率计的开发

• 批准号: 0634872
• 负责人: Scott Darveau
• 金额: --
• 依托单位: University of Nebraska at Kearney
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2007
• 资助国家: 美国
• 起止时间: 2007-01-01 至 2009-12-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0634872&HistoricalAwards=false
• 关键词: RUI; Development; Fixed; Frequency; Aerosol

Estimates of aerosol radiative forcing would benefit from new techniques for measuring light extinction and scattering by atmospheric aerosols. Of particular interest is the ratio between aerosol scattering coefficient and extinction coefficient, known as the aerosol single scatter albedo. In this work, a new instrument for the determination of aerosol albedo at 532 nm will be designed, constructed, and tested. The method employs a cavity ring-down based extinction measurement inside an integrating sphere. Light that is scattered from the ring-down beam by aerosols will be collected by the sphere in order to measure the aerosol scattering coefficient. Work will be undertaken to characterize the performance of the instrument, understand its limitations, and demonstrate its utility for monitoring aerosol extinction coefficient, scattering coefficient and albedo. Throughout the effort, undergraduate students will work with the PI to design the instrument, and collect and analyze the resultant data. This research will provide students with a background in optical measurements, electronics, lasers, and atmospheric aerosols. The students will be encouraged to present their research results at national conferences. As such, the experience will supplement the students' normal coursework and significantly broaden their undergraduate experience. Broader impacts also include enhancement of research infrastructure at the PI's institution.

气溶胶辐射强迫的估计值将受益于测量大气气溶胶灭绝和散射的新技术。 特别令人感兴趣的是气溶胶散射系数与消光系数之间的比率，称为气溶胶单个散射反照率。 在这项工作中，将设计，构造和测试在532 nm确定气溶胶反照率的新仪器。 该方法采用基于空腔戒指的灭绝测量测量。 从气溶胶中散射从环形梁中的光将由球体收集，以测量气溶胶散射系数。 将进行表征仪器的性能，了解其局限性并证明其用于监测气溶胶灭绝系数，散射系数和反照率的效用。 在整个努力中，本科生将与PI合作设计乐器，并收集和分析所得数据。这项研究将为学生提供光学测量，电子，激光器和大气气溶胶的背景。 将鼓励学生在国家会议上介绍他们的研究结果。 因此，经验将补充学生的正常课程，并大大扩大他们的本科经验。 更广泛的影响还包括增强PI机构的研究基础设施。