He upper and reduced lines of the box represent the 1st and 3rd of 17 Atmosphere 2021, 12, x The PEER inside the box may be the median mass concentration for every single season. The upper and FOR line Evaluation 10 quartiles. The upper and represent the 1st and values of 99 and 1 , respectively. The asterisks above the best reduced lines on the box decrease whiskers represent 3rd quartiles. The upper and reduce whiskers representline and beneath of 99 and are respectively. The asterisks above valuesthe bottom line1 , the maximum and minimum values. the prime line and under the bottom line would be the maximum and minimum values.3.four. Liquid/Solid Supply Analysis and Implications for Brown Carbon With spectral EBC concentration variations, Equations (eight)10) may very well be utilized to divide EBC concentrations into liquid sources (such as gasoline) and solid sources (such as coal). In this study, each day typical liquid and strong EBC concentrations had been calculated. Each and every day is categorized as a liquid day (liquid supply dominates) or a solid day (solid supply dominates), as shown in Figure 6. For the entire analysis period, liquid source days accounted for 70 , suggesting that EBCs in Xuzhou mostly derived from liquid fuel combustion. During the Naftopidil manufacturer nonheating season, liquid source days accounted for 77 . Seventy-two % of heating days were solid supply days, suggesting that the coal combustion for heating on in recent times largely changed the source of EBC.Figure six. Liquid and strong source evaluation for the heating season, nonheating GMP IL-21 Protein Species season and entire year. Figure 6. Liquid and strong source evaluation for the heating season, nonheating season and complete year. Table 2. this paper,(EBC370)/(EBC880). In Statistics of (EBC370) is measured EBC concentrations at 370 nm band, and(EBC880) is definitely the corresponding value at 880 nm band. (EBC370) should theoretically be Season Minimum Maximum average Regular Deviation higher than (EBC880), as brown carbon aerosol is much more absorbing at shorter. Depending on Heating season 0.177 1.838 1.106 this characteristic, (EBC370)/(EBC880) can indicate the seasonal influence0.277 of brown carNonheating season 0.533 1.026 1.071 0.262 bon to a particular extent [25]. The difference amongst (EBC370)/(EBC880) for the heating season and nonheating season in Xuzhou through the study period is shown in Table two. The average worth for the heating season is 1.106, and the typical worth for the nonheating season is 1.071. This shows that the proportion of brown carbon in EBC in the course of the heating season is significantly greater than that for the duration of the nonheating season, plus the maximum worth and regular deviation in the heating season are considerably greater than those for the nonheating season, indicating that brown carbon aerosols constitute a bigger proportion during the heating season but are unstable.Table 2. Statistics of (EBC370)/(EBC880)Atmosphere 2021, 12,Atmosphere 2021, 12, x FOR PEER REVIEW10 of11 of3.five. Analysis of Contribution of Potential Sources of Xuzhou. Xuzhousource of possible air pollutants, the mixed single-particle northwest To determine the belongs towards the monsoon climate zone and experiences Lagrangian winds and trajectory winds in the spring and winter and southeast winds and southwest integrated northeast (HYSPLIT) model created by the Air Resources Laboratory (ARL) winds in theanalyze the hourly typical EBC concentrationsof the monsoon inng/m3 soon after was utilized to summer and autumn. Owing for the influence above 3.00 103 the air on EBC transportation, the north w.