基于SBDART模型的中国台北地区气溶胶辐射强迫数值表征研究

Numerical Characterization of Aerosol Radiative Forcing Over Chinese Taipe Region Based on SBDART Model

气溶胶辐射强迫(DARF)是用于表征其辐射与气候效应的重要物理量,获取的有效途径是将气溶胶光学特性代入辐射传输模型,对DARF进行数值模拟。本文利用天基类型识别模型,对台北地区的气溶胶种类及占比进行了分析,同时结合该地区的AERONET站点数据,基于SBDART模型,研究了该地区不同时间维度下DARF的变化以及不同大气背景条件对DARF的影响。本文研究结果表明:研究期间台北地区的DARF具备显著的季节性变化规律,即夏季高、冬季低;DARF值一定程度上受其粒子类型支配,城市工业型气溶胶是高DARF的主要贡献者。

The method that numerical characterizing the aerosol direct radiative forcing(DARF)based on the combination of optical parameter and radiative transfer model is one of the efficient ways for the research of aerosol radiative properties and climate effect. Satellite-based classification model was used in the study to analyze the aerosol type and corresponding proportion over Taipei region, and then uses the SBDART model and the data provided by AERONET site located at the region to further analyze the DARF under different time scales and atmospheric background condition. The results show that: During the research period, DARF in the Taipei area exhibited significant seasonal variations, with high values in summer and low values in winter. The DARF values were to some extent governed by particle types, with urban industrial aerosols being the main contributors to high DARF.