Direct Aerosol Forcing of Climate: Tests of the Internal Consistency of Aerosol Characterizaion Data

9320871 Charlson：这个研究项目正在开发一种方法，用于实地测量与气候有关的重要光学特性，然后将其应用于具有区域代表性的地点，以便为全球气候模型提供相关参数。我们的目标是通过密集的观测活动来描述测量不确定性并研究测量参数变化的来源。气溶胶的光学性质可以直接测量，也可以通过米氏理论通过气溶胶尺寸分布和尺寸分解化学的测量来预测。这两种方法需要收敛，以验证目前对气溶胶光学的理解，并评估米氏计算所需的各种简化假设的准确性。四项具体任务将是量化和减少目前在对流层气溶胶的重要气候光学特性中存在的不确定性；(1)开发一种测量和数据分析方法，(2)在一个特征良好、污染最小的海洋站点（cheka Peak）演示扩展测量集的关闭，(3)在不同的代表性站点（清洁和污染的海洋，清洁和污染的大陆）演示关闭，(4)向测量和建模社区提供气溶胶光学参数。

9320871 Charlson This research project is developing a methodology for in situ measurements of the climatically important optical concerned with properties which can then be applied to regionally representative sites in order to provide relevant parameters for global climate models. Our goals to characterize measurement uncertainties and to study the sources of variation in the measured parameters by intensive, observational campaigns. Aerosol optical properties will be both measured directly and predicated by Mie theory form measurements of aerosol size distribution and size-resolved chemistry. Convergence of these two approaches is required to validate the present understanding of aerosol optics and assess the accuracy of various simplifying assumptions required by the Mie calculation. Four specific tasks will be to quantify and reduce the uncertainties that presently exist in the climatically important optical properties of tropospheric aerosols; (1) develop a measurement and data analysis methodology, (2) demonstrate closure of an extended measurement set at a well-characterized, minimally- polluted marine site (Cheeka Peak), (3) demonstrate closure at different representative sites (clean and polluted marine, clean and polluted continental), and (4) deliver aerosol optical parameters to measurement and modelling communities.