Bsolute worth of the Pearson correlation coefficient is straight proportional for the correlation. In line with its size, it can be divided into the following categories: 0.eight.0 (extremely powerful correlation), 0.six.8 (robust correlation), 0.four.6 (medium degree correlation), 0.2.4 (weak correlation), and 0.0.two (very weak correlation or no correlation) [21]. To analyze the long-distance transportation of EBCs, the prospective source contribution function (PSCF) model [22] is utilised in this study. The model treats the pollution contribution of every location for the receptor point as a ratio on the pollution trajectory to the residence time of all trajectories in the passing area and is widely utilized in analyzing the supply of atmospheric pollutants. three. Benefits three.1. EBC Variation Trends The 880 nm band is commonly applied to measure standard EBC concentrations, which could be defined as the output EBC concentrations as brown carbon absorption contributes little. Concentrations measured at shorter wavelengths are often larger than 880 nm band concentrations resulting from brown carbon absorption. The introduction of measurements at shorter wavelengths could represent the light absorbing effects of brown carbon [23]. In this study, the daily average from the derived EBC concentrations at seven wavelengths is shown in Figure 2. Contemplating representativeness, this study chosen every day measurements with a minimum of 16 h of information. In total, 651 productive every day measurements of EBC concentrations have been obtained. Taking 880 nm because the standard EBC measurement, from May perhaps 2014 to July 2016, the daily maximum EBC was 11.50 103 ng/m3 , the minimum was 0.02 103 ng/m3 , plus the typical concentration was 2.44 103 ng/m3 . Among these seven bands, the peak value of 370 nm was noticeably higher than that in the other bands. The variation trends of all seven wavelengths are comparable, with somewhat low and stable values inside the summer season and autumn and speedy increases inside the winter and spring. The measured monthly average EBC are shown in Figure three. Taking into consideration the representativeness and statistical significance, only the Ritanserin Description months with no less than 15 effective days are selected to calculate the month-to-month typical concentration. Consequently, there’s a lack of average information 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, whilst the concentrations inside the autumn were higher than those within the spring and summer time. Within a year, from 20 November to ten March is considered the heating season, plus the rest are DBCO-Sulfo-NHS ester Purity & Documentation viewed as the nonheating season.Atmosphere 2021, 12,6 ofFigure 2. Day-to-day variations in EBC in Xuzhou from Could 2014 to July 2016. To ensure the representativeness with the each day average, only everyday measurements with much more than 16 hourly means are chosen.The measured month-to-month typical EBC are shown in Figure three. Considering the representativeness and statistical significance, only the months with at the very least 15 efficient days are selected to calculate the month-to-month average concentration. For that reason, there is a lack of typical information for 5 months: December 2014, January 2015, November 2015, December 2015 and May possibly 2016. The EBC concentrations in the winter have been larger than those within the other 3 seasons, while the concentrations inside the autumn have been greater than those inside the spring Figure two.and summer time. Inside ain Xuzhou from May 2014 to to 10 March ensure the representativeness on the each day Each day variations in EB.