Measurement of Aerosol Chemical, Physical, and Radiative Properties Related to Direct Climate Forcing in China

本项目是ACE-Asia项目（气溶胶表征实验）的一部分。将在中国陕西省的一个地面站点测量各种气溶胶光学特性，该站点位于主要粉尘源附近。测量期将与中国北方下风地区航空野外项目的密集观测期相吻合，从而为一个重要源区的气溶胶特性提供有价值的信息。PI将测量气溶胶光散射并确定吸收系数。小于2.5微米尺寸的气溶胶样品也将被分析质量、主要离子、元素和有机碳浓度。这些测量将有可能确定灰尘和人为气溶胶对该地区气溶胶灭绝的相对贡献。PI还将测量与波长相关的气溶胶光学深度，晴空条件下的总水柱水蒸气和臭氧，以及光合有效辐射。这些测量将提供有关沙尘负荷与直接气候强迫之间关系的信息。

This project is part of the ACE-Asia Program (Aerosol Characterization Experiment). A variety of aerosol optical properties will be measured at a ground site in Shaanxi Province, China, which is located in the vicinity of major dust sources. The measurement period will coincide with the intensive observing period of the airborne field program downwind of Northern China, thus providing valuable information on aerosol properties in an important source region. The PI will measure aerosol light scattering and determine absorption coefficients. Aerosol samples in the less than 2.5 micron size fraction will also be analyzed for mass, major ionic, and elemental and organic carbon concentrations. These measurements will make it possible to determine the relative contributions of dust and anthropogenic aerosols to aerosol extinction in this region. The PI will also measure the wavelength dependent aerosol optical depth, total column water vapor and ozone during clear-sky conditions, and photosynthetically active radiation. These measurements will provide information on the relationship between dust loading and direct climate forcing.