京津唐地区气溶胶直接辐射强迫的遥感观测

doi:10.7523/j.issn.2095-6134.2016.02.003

摘要/Abstract

摘要：

利用2012年3月京津唐地区气溶胶综合观测实验的地基和卫星遥感数据,结合SBDART辐射传输模型,进行气溶胶直接辐射强迫研究.结果表明,该地区大气中细颗粒居多,气溶胶消光较强,散射性明显,前向散射比例较大.北京、塘沽、唐山大气顶气溶胶平均辐射强迫分别为(-6.58±5.06)、(-13.65±11.51)和(-11.68±7.72)W/m²,地表气溶胶平均辐射强迫分别为(-30.14±13.21)、(-39.11±20.5)和(-28.06±13.34)W/m²,大气层气溶胶平均辐射强迫分别为(23.56±9.50)、(25.46±12.93)和(16.38±8.23)W/m²,说明气溶胶对大气顶和地表产生显著降温效应,对大气层产生增温效应,因此有利于逆温结构的形成,不利于大气污染物的扩散.虽然北京站点辐射强迫值较小,但其辐射强迫效率在3个站点中最大,这主要是因为其单次散射反照率最小.

关键词: 气溶胶直接辐射强迫, 气溶胶光学特性, 京津唐地区, SBDART

Abstract:

We performed a comprehensive experiment in Beijing-Tianjin-Tangshan region during March 2012. The aerosol direct radiative forcing was explored using the radiative transfer model SBDART based on ground-based and satellite remote sensing data. The measured aerosol optical parameters indicated that there were a large number of fine particles in the atmosphere; aerosol's effect of extinction in solar radiation was evident; aerosol scattering was large; and the forward scattering was strong. The average aerosol direct radiative forcing values were (-6.58±5.06),(-13.65±11.51),and (-11.68±7.72)W/m² on the top of atmosphere,(-30.14±13.21), (-39.11±20.5),and (-28.06±13.34)W/m² at the surface,and (23.56±9.50),(25.46±12.93),and (16.38±8.23)W/m² in the atmosphere at Beijing, Tanggu, and Tangshan,respectively. Aerosol cooling effect to the surface and top of atmosphere and aerosol heating effect to the atmosphere were strong, which could cause atmospheric temperature inversion and then suppress the pollutant dispersion. At Beijing site, aerosol radiative forcing was relatively small, but aerosol radiative forcing efficiency was the largest among the three sites, which was mainly because the single-scattering albedo of aerosols was the smallest at Beijing site.

Key words: aerosol direct radiative forcing, aerosol optical properties, Beijing-Tianjin-Tangshan region, SBDART

中图分类号:

张凤霞, 李正强, 李凯涛, 张莹. 京津唐地区气溶胶直接辐射强迫的遥感观测[J]. 中国科学院大学学报, 2016, 33(2): 155-161.

ZHANG Fengxia, LI Zhengqiang, LI Kaitao, ZHANG Ying. Aerosol direct radiative forcing in Beijing-Tianjin-Tangshan region based on remote sensing measurements[J]. , 2016, 33(2): 155-161.

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