我国家用燃煤源气溶胶的光学性质及其对辐射强迫的影响

大气气溶胶可通过直接和间接辐射效应改变地气系统的辐射平衡, 在全球气候变化中扮演着重要的角色。然而气溶胶对辐射强迫的影响仍然存在很大的不确定性。气溶胶的光学性质是研究气溶胶辐射效应的重要基础，其中有关源排放气溶胶光学性质的研究和认识仍然不足。本项目拟利用实验室模拟采样系统，实时监测家用燃煤源气溶胶的光学参数，研究其与粒径分布、燃烧条件、老化时间、化学组成之间的相关关系，揭示家用燃煤气溶胶光学性质的演变规律，定量气溶胶主要化学组分对光吸收和散射的贡献。同时结合OPAC-TUV箱式模型，评估家用燃煤源气溶胶对辐射强迫的影响，为气候变化和大气治理研究提供科学依据。

Aerosol can influence the radiative balance of the earth-atmosphere system by direct and indirect effects, thereby plays an important role in global climate change. However, aerosol effect on radiative forcing is considered as the key uncertainty. The optical properties of aerosol are an important basis for studying the aerosol radiation effect, but are still poorly understood in China and aboard, especially for aerosol from residential coal combustion. Laboratory burn tests will be conducted using a custom-made combustion chamber to monitor real-time optical parameters of aerosols from residential coal combustion. Particle size distribution, combustion parameters, aerosol aging time and chemical compositions will be also measured to comprehensive study their relations with optical properties of coal combustion aerosol. Further, the contribution of major chemical components to light absorption and scattering will be quantified. Optical parameters obtained from this study, combined with OPAC-TUV model can be used to evaluate the effect of coal combustion aerosols on radiative forcing. Findings from this work can provide scientific support on air pollution control and climate change.