The optical properties and radiative forcing of atmospheric aerosol (ARF) and black carbon (BC) aerosol (BCRF) in ultraviolet (UV), visible (VIS), near-infrared (NIR), and shortwave (SW) spectra were investigated under haze conditions based on the observations of the Aethalometer and sun-sky radiometer and simulations from libRadtran. The results show that the BC concentrations increased greatly from 2.73 μg/m³ under clear-air conditions to 7.95 μg/m³ under severe haze conditions, while BC aerosol optical depth (AOD) increased from 0.025 to 0.092. A high correlation (R²=0.62) was found between BC AOD and absorbing aerosol optical depth (AAOD) derived from the sun-sky radiometer. The BCRF in SW (BCRF_SW) varied from -10.20 W/m² under clear-air conditions to -25.40 W/m² under severe hazy conditions. However, its fraction in ARF (ARF_SW) decreased from 19% to 17% simultaneously, which is mainly related to the decrease of the ratio of BC AOD to AOD. The fraction of ARF in VIS in ARF_SW decreased from 56.3% under clear-air conditions to 50.5% under severe haze conditions, while the fraction of BCRF in VIS in BCRF_SW was much larger, and increased from 72.9% to 73.8%. The BCRF efficiency (BCRFE) was much larger than ARF efficiency (ARFE), and both of them decreased with the development of haze. The ARFE in SW decreased from -173.84 W/m² under clear-air conditions to -112.75 W/m² under severe haze conditions while BCRFE_SW varied from -482.50 W/m² to -321.88 W/m². The decrease of ARFE and BCRFE is related to the increase of aerosol loading and asymmetry factor (ASY). The ASY increased and the forward scattering was enhanced with the development of haze due to the hygroscopic growth of aerosol particles, which reduced the extinction efficiency of aerosols including BC on solar radiation and the cooling effect on the surface.

在雾霾下研究了大气气溶胶（ARF）和黑碳（BC）气溶胶（BCRF）在紫外（UV），可见（VIS），近红外（NIR）和短波（SW）光谱中的光学性质和辐射强迫基于测速仪和太阳辐射计的观测以及libRadtran的模拟得出的条件。结果表明，在晴空条件下，BC浓度从2.73μg/ m ³大大增加到在严重雾霾条件下的7.95μg/ m ³，而BC气溶胶光学深度（AOD）从0.025增加到0.092。在BC AOD和吸收自太阳天空辐射计的吸收气溶胶光学深度（AAOD）之间发现高度相关性（R ² = 0.62）。SW中的BCRF（BCRF _SW）在-10.20 W / m之间变化²在晴空条件下达到-25.40 W / m ^2，在严重的雾霾条件下。然而，其在ARF中的比例（ARF _SW）同时从19％下降到17％，这主要与BC AOD与AOD的比率降低有关。ARF _SW的VIS中ARF的比例从晴空条件下的56.3％降低到严重雾霾条件下的50.5％，而BCRF _SW的VIS中的BCRF比例则要大得多，从72.9％增加到73.8％。BCRF效率（BCRFE）远大于ARF效率（ARFE），并且两者都随着雾度的升高而降低。在SW的ARFE从-173.84 W /米减小²晴空条件下-112.75 W /米²在严重的雾霾条件下，而BCRFE _SW从-482.50 W / m ²到-321.88 W / m ²。ARFE和BCRFE的减少与气溶胶负荷和不对称因子（ASY）的增加有关。由于烟雾颗粒的吸湿性增长，随着雾度的增加，ASY增加并且前向散射增强，这降低了包括BC在内的气溶胶对太阳辐射的消光效率以及表面的冷却效果。