A General Circulation Model (GCM) Investigation of the Direct Radiative Forcing of Spherical and Nonspherical Aerosols

本研究的目的是提高我们对气溶胶，云，辐射和动力过程之间的相互作用的理解，以及不同类型的气溶胶对区域和全球气候的相对重要性。这项工作涉及气候建模和分析。本文利用我国近40年来收集的卫星气溶胶资料，对气溶胶进行了分析，并将其应用于气候模式模拟。新的奋进将包括气溶胶的单次散射特性参数化，以用于气候模型，其基础是采用光散射时域有限差分法计算非球形气溶胶的散射和吸收特性所获得的数据。两个加州大学的模式-大气环流模式和耦合的海洋-大气模式用于这项工作，调查的响应，单独的大气系统，耦合的大气-海洋系统，各种气溶胶类型的辐射强迫，特别是矿物粉尘和黑碳。 这项工作的结果有望进一步将气溶胶效应纳入全球气候模式，并将使全球气候模拟界受益。拟议的建模活动将在气候建模和气溶胶-气候相互作用方面培训一名研究助理。更好地理解气溶胶-气候相互作用的影响将对中国和整个地球产生重大利益。

The objective of this study is to improve our understanding of the interactions among aerosols, clouds, radiation, and dynamical processes, and of the relative importance of different types of aerosols on regional and global climate. The work involves both climate modeling and analysis. Aerosol data retrieved from satellites and collected by the scientists in China during the past forty years are to be analyzed and employed in climate modeling simulation. The new endeavor will include parameterization of the single-scattering properties of aerosols for use in climate models based on the data obtained from the calculations of the scattering and absorption properties of nonspherical aerosols employing the finite-difference time domain method for light scattering. Two University of California models with be used for this work - the atmospheric general circulation model and the coupled ocean-atmosphere model, to investigate the responses of the atmospheric system alone, and the coupled atmosphere-ocean system, to the radiative forcings of various aerosol types, particularly mineral dust and black carbon. The results of this work are expected to further the incorporation of aerosol effects into global climate models and will benefit the global climate modeling community. The proposed modeling activity will train one research assistant in climate modeling and aerosol-climate interaction. The impact of better understanding aerosol-climate interactions will have significant benefits for both China and the Earth as a whole.