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Physical, chemical, optical and radiative properties of polar aerosols - IPY 2007-2008

机译:极性气溶胶的物理,化学,光学和辐射特性-IPY 2007-2008

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摘要

Among the numerous climatic factors acting on the Earth's energy balance, atmospheric aerosols are known to influence climate by (i) scattering and absorbing both the short-wave and long-wave radiation fluxes (direct effects) (Charlson et al., 1992) and (ii) acting as cloud condensation nuclei, thus modifying the microphysical properties of clouds and influencing radiation and precipitation development (indirect effects) (Schwartz et al., 1995). In particular, high-latitude regions present extensive areas characterized by high-reflectance, where solar radiation undergoes long path-length transmission due to relatively low solar elevation angles. As a result, Polar aerosols produce significant effects on the overall albedo of the surface-atmosphere system. Such effects can, in fact change the magnitude and sign of direct radiative forcing, depending on aerosol optical and morphological properties, their chemical composition, surface albedo and solar zenith angle (Shaw et al., 1993; Randies et al., 2004).
机译:在影响地球能量平衡的众多气候因素中,已知大气气溶胶通过以下方式影响气候:(i)散射和吸收短波和长波辐射通量(直接影响)(Charlson等,1992)和(ii)充当云凝结核,从而改变云的微物理性质并影响辐射和降水的形成(间接作用)(Schwartz等,1995)。特别地,高纬度区域呈现出以高反射率为特征的广阔区域,在该区域中,由于相对较低的太阳仰角,太阳辐射经历了较长的光程传输。结果,极性气溶胶对表面-大气系统的整体反照率产生了重大影响。实际上,这种影响可以改变直接辐射强迫的大小和迹象,这取决于气溶胶的光学和形态特性,其化学成分,表面反照率和太阳天顶角(Shaw等,1993; Randies等,2004)。

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  • 来源
    《Atmospheric environment》 |2012年第6期|p.1-3|共3页
  • 作者单位

    Institute of Atmospheric Sciences and Climate (ISAC), National Council of Research (CNR), Via Gobetti 101, Bologna, Italy;

    National Institute of Polar Research (NIPR), 10-3 Midori-cho, Tachiakwa-shi, Tokyo, Japan;

    CARTEL, Universite de Sherbrooke, 2500 Boul. Universite, Sherbrooke, Quebec, Canada;

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