A correction to results by Magi (2009) is presented here. By combining the in situ measurements of speciated aerosol mass concentrations with concurrent measurements of total aerosol optical properties at a wavelength of 550 nm, it is shown that ~66 % of scattering is due to carbonaceous aerosol, where derived mass scattering cross sections (MSC) for OC and BC are 3.8 0.5 m2 g?1 and 2.9 0.8 m2 g?1, respectively. Derived values of mass absorption cross sections (MAC) for OC and BC are 0.7 0.2 m2 g?1 and 12.1 0.8 m2 g?1, respectively. The values of MAC imply that ~21 % of the mid-visible aerosol absorption in southern Africa is due to OC, with the remainder due to BC. SSA for BC and OC are about the same as Magi (2009). The results here are determined using an approach that accounts for the fact that OC and BC are partially scattering and absorbing.
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机译：这里给出了Magi（2009）的对结果的校正。通过在波长为550nm的波长的同时测量时将所指的气溶胶质量浓度的原位测量相结合，显示〜66％的散射是由于含碳气溶胶，其中衍生的质量散射横截面（MSC）对于OC和BC分别为3.8 0.5m 2 G？1和2.9 0.8m 2 G？1。用于OC和Bc的质量吸收横截面（Mac）的衍生值分别为0.7 0.2m 2 G 2，分别为0.7 0.2m 2 G 2。 Mac的价值意味着南非中部可见的气溶胶吸收的〜21％是由于oc，由于BC而剩余的。 BC和OC的SSA与MAGI（2009）大致相同。这里的结果是使用占OC和BC部分散射和吸收的事实的方法来确定。
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