Ols could not be ignored. three.four. Liquid/Solid Supply Analysis and Implications for Brown Carbon With spectral EBC Rezafungin Epigenetic Reader Domain concentration differences, Equations (eight)10) may be utilized to divide EBC concentrations into liquid sources (like gasoline) and strong sources (such as coal). In this study, day-to-day typical liquid and strong EBC concentrations were calculated. Each day is categorized as a liquid day (liquid source dominates) or a solid day (strong supply dominates), as shown in Figure six. For the whole investigation period, liquid supply days accounted for 70 , suggesting that EBCs in Xuzhou mainly derived from liquid fuel combustion. During the nonheating season, liquid source days accounted for 77 . Seventytwo % of heating days had been solid supply days, suggesting that the coal combustion for heating on Chlorfenapyr Autophagy nowadays largely changed the source of EBC.Atmosphere 2021, 12, 1314 Atmosphere 2021, 12, x FOR PEER REVIEWof 8 of817Figure 4.4. Correlation analysis of equivalent black carbon and atmospheric pollutants. Figure Correlation analysis of equivalent black carbon and atmospheric pollutants.Within this paper, (EBC370) is measured EBC concentrations at 370 nm Table 1. Pearson correlation coefficient of multichannel EBC and atmospheric pollutants. band, and (EBC880)7-wavelength EBC EBC370 EBC470 EBC520 EBC590 EBC660 EBC880 EBCis the corresponding value at 880 nm band. (EBC370) ought to theoretically be higher than PM2.five PM10 NO2 O3 (EBC880), as brown carbon aerosol is moreSO2 absorbing at shorter. Based on this characteristic, (EBC370)/(EBC880) can indicate the seasonal influence of brown carbon to a particular 0.451 0.572 0.524 0.208 0.383 -0.191 extent [25]. The distinction between (EBC370)/(EBC880) 0.388 heating season nonfor the and 0.482 0.577 0.530 0.217 -0.194 for the duration of 0.487 heating season in Xuzhou0.527 the research period is shown in 0.574 0.214 0.385 Table two. The typical value -0.195 for the heating season is 1.106, and the average value for the 0.383 nonheating season is 1.071. This 0.489 0.571 0.522 0.211 -0.197 of brown carbon0.209 throughout the heating season-0.197 in EBC is considerably 0.490 shows that the proportion0.520 0.568 0.380 larger than that during the nonheating season, along with the maximum worth and common de0.491 0.561 0.512 0.202 0.376 -0.200 0.489 viation of your 0.555 heating season are drastically greater than these the nonheating season, 0.507 0.197 0.373 for -0.200 indicating that brown carbon aerosols the amount of = 0.01 (two-sided). Note: suggests that the correlation is significant at constitute a bigger proportion in the course of the heating season but are unstable. three.3. Correlation among Multichannel EBC and Atmospheric PollutantsCOduring the nonheating period, but there is absolutely no important distinction in the lowest value. Taking 880 nm as an example, the average distinction in between heating and nonheating seasons is approximately 1.32 103 ng/m . There were also spectral variations between the heating and nonheating seasons, and the difference was largest at 370 nm (1.79 103 Atmosphere 2021, 12, 1314 ng/m ) and steadily decreased to 1.31 103 ng/m at 950 nm, suggesting that brown carbon aerosols could not be ignored.9 ofFigure five. EBC concentrations in seven during the heating heating season, season, and season, and Figure5. EBC concentrations in seven bandsbands through theseason, nonheating nonheatingentire year. The line within the box will be the entire year. median mass concentration for each and every season. T.