Aerosol Light Scattering and Related Properties at Climate Sensitive Sites (ACE-2)

本项目的主要目标是提供可靠的实验和模拟结果，描述环境气溶胶的光散射特性和组成。该项目是北大西洋区域气溶胶特征试验（ACE-2）的一部分，该试验将于1997年6月和7月在亚热带东北大西洋上空进行，是一项国际合作项目。ACE-2的主要目标是利用飞机、船载和地面测量，研究与辐射强迫和气候有关的大气气溶胶特性。测量将在葡萄牙萨格雷斯的一个地面站用现场快速反应气溶胶采样仪器进行，为期六周。气溶胶光散射特性将由伊利诺伊大学人员控制相对湿度浊度法获得。气溶胶颗粒组成、气溶胶颗粒大小分布和吸湿生长测量将由来自西雅图华盛顿大学沙漠研究所和莱比锡对流层研究所的合作者进行。与迈阿密大学C. Pilinis博士合作，将利用最近开发的热力学模型对现场颗粒测量和气溶胶成分进行进一步分析。测量和模型将被整合，以描述环境气溶胶的光散射系数及其对受控相对湿度、光波长、光散射方向和粒子组成的依赖。

9610051 Rood The primary objective of this project is to provide reliable experimental and modeled results describing the ambient aerosols' light scattering properties and composition. This project is part of the North Atlantic Regional Aerosol Characterization Experiment (ACE-2) which will be conducted in June and July, 1997, over the subtropical Northeastern Atlantic Ocean as an international collaborative effort. The main objectives of ACE-2 are to study the properties of atmospheric aerosols relevant to radiative forcing and climate using aircraft, ship-board, and ground-based measurements. Measurements will be performed with in-situ rapid response aerosol sampling instrumentation for a six-week period at a ground-based station at Sagres, Portugal. Aerosol light scattering properties will be obtained with controlled relative humidity nephelometry performed by University of Illinois personnel. Aerosol particle composition, aerosol particle size distribution, and hygroscopic growth measurements will be performed by collaborators from the Desert Research Institute, University of Washington, Seattle, and Institute of Tropospheric Research, Leipzig. Further analyses of the in-situ particle measurements and aerosol composition will be performed with recently developed thermodynamic models in collaboration with Dr. C. Pilinis, University of Miami. Measurements and models will be integrated to describe the ambient aerosol's light scattering coefficients and their dependence on controlled relative humidity, wavelength of light, direction of light scattered, and particle composition.