Influence of Aerosol Light Scattering on Climate at a Remote Marine Site (ACE-1)

9418376这个项目是南半球海洋气溶胶特性实验的一部分，该实验将于1995年在遥远的南太平洋进行，使用飞机、船载和地面测量各种化学物质、物理和气象参数，其中心目标是调查大气气溶胶的形成、演变和光学性质。在这个组件中，将在塔斯马尼亚州格里姆角测量环境气溶胶S质量散射系数及其与光波长、散射方向和相对湿度的关系。这些结果将与气溶胶颗粒直径随相对湿度和颗粒组成变化的实验数据相结合，然后与使用化学平衡和气溶胶颗粒光散射程序模拟的结果进行比较。这项研究的结果将被用作全球尺度气候模型的直接输入，该模型描述了环境气溶胶颗粒对辐射能量平衡的影响。气溶胶质量散射系数将使用受控相对湿度比浊法、滤膜采样和离子色谱法来确定。气溶胶颗粒光散射对相对湿度的依赖关系将在三个波长上确定，并作为总散射光和背向散射光。其他ACE-1参与者将使用串联差分迁移率测量来测量气溶胶颗粒尺寸与相对湿度的关系。

9418376 Rood This project is part of the Southern Hemisphere Marine Aerosol Characterization Experiment (ACE-1), which will be conducted in the remote Southern Pacific in 1995 using aircraft, ship-board, and ground-based measurements of a wide variety of chemical species, physical and meteorological parameters with the central goal of investigating the formation, evolution, and optical properties of atmospheric aerosol. In this component, measurements of the ambient aerosol s mass scattering coefficient, its dependence on the wavelength of light, direction of light scattered, and relative humidity will be carried out at Cape Grim, Tasmania. These results will be integrated with experimental data on aerosol particle diameter dependence on relative humidity and particle composition, and then compared with modeled results using chemical equilibrium and aerosol particle light scattering codes. Results of this research will be used as direct input to global scale climate models which describe the effect of ambient aerosol particles on the radiative energy balance. Aerosol mass scattering coefficients will be determined using controlled relative humidity nephelometry, filter sampling, and ion chromatography. Aerosol particle light scattering dependence on relative humidity will be determined at three wavelengths and as total and back scattered light. Other ACE-1 participants will contribute measurements of aerosol particle size dependence on relative humidity using tandem differential mobility measurements.