Bsolute value with the Pearson correlation coefficient is directly proportional towards the correlation. In accordance with its size, it might be divided in to the following categories: 0.8.0 (quite strong correlation), 0.six.eight (strong correlation), 0.4.six (medium degree correlation), 0.2.four (weak correlation), and 0.0.2 (really weak correlation or no correlation) [21]. To analyze the long-distance transportation of EBCs, the possible supply contribution function (PSCF) model [22] is made use of within this study. The model treats the pollution contribution of every single area to the receptor point as a ratio of the pollution trajectory towards the residence time of all trajectories inside the passing location and is broadly made use of in analyzing the source of atmospheric pollutants. 3. Final results 3.1. EBC Variation Trends The 880 nm band is typically employed to measure common EBC concentrations, which may very well be defined because the output EBC concentrations as brown carbon absorption contributes tiny. Concentrations measured at 1-Aminocyclopropane-1-carboxylic acid web shorter wavelengths are usually larger than 880 nm band concentrations as a result of brown carbon absorption. The introduction of measurements at shorter wavelengths may represent the light absorbing effects of brown carbon [23]. Within this study, the day-to-day average with the derived EBC concentrations at seven wavelengths is shown in Figure two. Considering representativeness, this study Aluminum Hydroxide manufacturer chosen day-to-day measurements with no less than 16 h of data. In total, 651 successful each day measurements of EBC concentrations were obtained. Taking 880 nm as the typical EBC measurement, from Might 2014 to July 2016, the each day maximum EBC was 11.50 103 ng/m3 , the minimum was 0.02 103 ng/m3 , and also the typical concentration was 2.44 103 ng/m3 . Amongst these seven bands, the peak worth of 370 nm was noticeably larger than that of the other bands. The variation trends of all seven wavelengths are related, with fairly low and steady values in the summer and autumn and rapid increases within the winter and spring. The measured month-to-month typical EBC are shown in Figure 3. Considering the representativeness and statistical significance, only the months with a minimum of 15 productive days are chosen to calculate the monthly average concentration. Hence, there is a lack of average information for 5 months: December 2014, January 2015, November 2015, December 2015 and May perhaps 2016. The EBC concentrations inside the winter have been larger than these within the other 3 seasons, though the concentrations in the autumn have been larger than those inside the spring and summer season. Inside a year, from 20 November to 10 March is viewed as the heating season, and also the rest are deemed the nonheating season.Atmosphere 2021, 12,six ofFigure two. Daily variations in EBC in Xuzhou from May perhaps 2014 to July 2016. To make sure the representativeness of the every day typical, only each day measurements with additional than 16 hourly signifies are selected.The measured monthly typical EBC are shown in Figure 3. Thinking about the representativeness and statistical significance, only the months with at least 15 powerful days are chosen to calculate the monthly typical concentration. Hence, there’s a lack of average data for five months: December 2014, January 2015, November 2015, December 2015 and Might 2016. The EBC concentrations within the winter had been greater than these in the other three seasons, although the concentrations within the autumn had been higher than these in the spring Figure two.and summer. Within ain Xuzhou from May well 2014 to to ten March guarantee the representativeness from the daily Daily variations in EB.