Continuous measurements of absorbing carbonaceous aerosol termed as black carbon (BC) have been carried out during April 2017 to March 2018 over Solapur, a semi-arid, rain shadow location in Peninsular India using a multi-wavelength Aethalometer (AE-33). Statistically significant higher values of BC were observed during the dry period (December–May, mean BC 4.3±1.2 µg m^–3) as compared to the wet period (June–October, mean BC 1.0 ± 0.15 µg m^–3). Hourly variation depicted an almost similar pattern in both wet and dry periods with a dominant morning peak followed by afternoon low and then a heightened plateau during the evening to midnight hours. The absorbing Angstrom exponent (AAE) value was 1.36 ± 0.16 and 1.10 ± 0.22, respectively, during dry and wet periods with an annual mean of 1.22 ± 0.23. The source apportionment of BC using the Aethalometer model depicts the dominance of fossil fuel burning throughout the year especially high during the wet period (89±11% to total BC) whereas biomass burning contributed significantly during the dry period (30±14% to total BC). The observed temporal variation of BC was mainly due to the varying strength of BC emission sources and changes in local meteorological parameters. In addition, long-range transport from other regions might have also contributed during certain periods as seen from the cluster and concentration weighted trajectory (CWT) analysis.

2017年4月至2018年3月，在印度半岛的半干旱，雨影位置Solapur上使用多波长湿度计（AE-33）对被称为黑碳（BC）的碳质气溶胶的吸收进行了连续测量。与干旱时期（6月至10月，平均BC 1.0±0.15 µg m ^–3）相比，干旱时期（12月至5月，平均BC 4.3±1.2 µg m ^–3）观察到BC的统计学显着较高值。）。每小时变化在干湿两季都表现出几乎相似的模式，主要是早晨的高峰，然后是下午的低点，然后在晚上到午夜时段的高原升高。在干燥和湿润时期的吸收埃斯特罗姆指数（AAE）值分别为1.36±0.16和1.10±0.22，年均值为1.22±0.23。使用Aethalometer模型进行的BC来源分配显示，全年化石燃料燃烧占主导地位，特别是在湿润时期较高（占总BC的89±11％），而生物质燃烧在干燥时期的贡献显着（占总BC的30±14％）公元前）。观测到的BC时间变化主要是由于BC排放源强度的变化和当地气象参数的变化。此外，