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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大气气溶胶对气候影响的认识。特别是，气溶胶成分和气溶胶辐射和云滴激活特性之间的关系将被测试。该计划是测量随时间变化的气溶胶化学成分在整个粒径谱，并研究如何变化影响计算和测量的光学和液滴成核特性的气溶胶，作为一个功能的粒径。一个辅助目标是比较在一个小的城市环境与那些在偏远的中部大陆网站，无论是在怀俄明州的测量。将采用一系列全面的气溶胶仪器来测量气溶胶成分、粒度分布、云滴成核特性、三个波长的散射和光吸收。特别重要的是使用气溶胶质谱仪来测量在短至几分钟的时间尺度上的颗粒尺寸分辨成分的可变性。这些测量，再加上尺寸分布测量，将允许光学和云凝结特性的气溶胶以类似的高时间分辨率进行计算，并与观测结果进行比较。对这些比较的分析将提供对气溶胶性质的大小和时间变异性的重要性的估计，以及使用这些性质的平均值来描述气溶胶行为的模型估计的适当性。对这些数据集的分析将有助于我们了解气溶胶对地球大气层的影响。其他更广泛的影响包括怀俄明州大学的能力建设和一名研究生的培训。