Comprehensive Physical and Chemical Measurements to Test Predictions of Radiative and Hygroscopic Properties of Surface Atmospheric Aerosol

综合物理和化学测量来测试对表面大气气溶胶的辐射和吸湿特性的预测

基本信息

批准号：
0441836
负责人：
Terry Deshler
金额：
$ 28.08万
依托单位：
University of Wyoming
依托单位国家：
美国
项目类别：
Continuing Grant
财政年份：
2005
资助国家：
美国
起止时间：
2005-01-01 至 2007-12-31
项目状态：
已结题

来源：
https://www.nsf.gov/awardsearch/showAward?AWD_ID=0441836&HistoricalAwards=false
关键词：
Comprehensive Physical Chemical Measurements Test

项目摘要

The primary goal of this project is to improve our understanding of the influence of atmospheric aerosols on climate. In particular, the relationships between aerosol composition and aerosol radiative and cloud droplet activation properties will be tested. The plan is to measure time-dependent variations of aerosol chemical composition across the particle size spectrum, and to examine how that variability affects calculated and measured optical and droplet-nucleating properties of the aerosol, as a function of particle size. An ancillary objective is to compare measurements made in a small urban environment with those at a remote mid-continental site, both in Wyoming. A comprehensive range of aerosol instruments will be employed to measure aerosol composition, size distribution, cloud drop nucleating properties, scattering at three wavelengths, and light absorption. Of particular importance will be the use of an aerosol mass spectrometer to measure the variability of particle size-resolved composition over time scales as short as a few minutes. These measurements, coupled with size distribution measurements, will permit optical and cloud condensation properties of the aerosol to be calculated with a similarly high time resolution, and compared with observations. Analysis of these comparisons will provide estimates of the importance of size and temporal variability of aerosol properties, and, thus, the appropriateness of model estimates which use averages of those properties to describe aerosol behavior. The analysis of these data sets will contribute to our understanding of the impacts of aerosol on the Earth's atmosphere. Additional broader impacts include capacity building at the University of Wyoming, and the training of a graduate student.

该项目的主要目标是提高我们对气溶胶对气候的影响的理解。特别是，将测试气溶胶组成与气溶胶辐射与云液滴活化特性之间的关系。该计划是测量粒度光谱中气溶胶化学成分的时间依赖性变化，并检查该变异性如何影响气溶胶的计算和测量的光学和液滴 - 核核特性，这是粒径的函数。一个辅助目标是将在小城市环境中进行的测量与怀俄明州的偏远中间大陆地点进行比较。将采用全面的气溶胶仪器来测量气溶胶组成，尺寸分布，云滴核的特性，在三个波长处散射以及光吸收。特别重要的是，使用气溶胶质谱仪来测量粒度分辨成分在时间尺度上的变化，短短几分钟。这些测量值以及尺寸分布测量值将允许使用类似的高时间分辨率来计算气溶胶的光学和云凝结特性，并与观测值相比。对这些比较的分析将估计气溶胶特性的大小和时间变化的重要性，因此，使用这些特性的平均值来描述气溶胶行为的模型估计值的适当性。对这些数据集的分析将有助于我们理解气溶胶对地球大气的影响。更广泛的影响包括在怀俄明大学的能力建设以及对研究生的培训。