Bsolute value of your Pearson correlation coefficient is straight proportional towards the correlation. Based on its size, it may be divided in to the following categories: 0.eight.0 (quite powerful correlation), 0.6.8 (powerful correlation), 0.four.six (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 potential source contribution function (PSCF) model [22] is employed in this study. The model treats the pollution contribution of every location to the receptor point as a ratio of your pollution trajectory towards the residence time of all trajectories in the passing region and is broadly utilized in analyzing the source of atmospheric pollutants. three. Final results 3.1. EBC Variation Trends The 880 nm band is frequently made use of to measure standard EBC concentrations, which could possibly be defined because the output EBC concentrations as brown carbon absorption contributes tiny. Concentrations measured at shorter wavelengths are usually bigger than 880 nm band concentrations as a result of brown carbon absorption. The introduction of measurements at shorter wavelengths may perhaps represent the light absorbing effects of brown carbon [23]. In this study, the day-to-day average in the derived EBC concentrations at seven wavelengths is shown in Figure 2. Taking into consideration representativeness, this study selected each day measurements with at the very least 16 h of Rapastinel Epigenetic Reader Domain information. In total, 651 helpful day-to-day measurements of EBC concentrations have been obtained. Taking 880 nm as the normal EBC measurement, from May well 2014 to July 2016, the day-to-day maximum EBC was 11.50 103 ng/m3 , the minimum was 0.02 103 ng/m3 , plus the average concentration was 2.44 103 ng/m3 . Amongst these seven bands, the peak worth of 370 nm was noticeably greater than that on the other bands. The variation trends of all seven wavelengths are similar, with relatively low and steady values Bevantolol Biological Activity within the summer time and autumn and fast increases within the winter and spring. The measured month-to-month average EBC are shown in Figure 3. Thinking about the representativeness and statistical significance, only the months with no less than 15 successful days are selected to calculate the month-to-month average concentration. For that reason, there is a lack of typical data for 5 months: December 2014, January 2015, November 2015, December 2015 and May perhaps 2016. The EBC concentrations within the winter had been larger than these within the other 3 seasons, though the concentrations within the autumn had been higher than those inside the spring and summer. Within a year, from 20 November to ten March is regarded as the heating season, along with the rest are regarded as the nonheating season.Atmosphere 2021, 12,six ofFigure two. Everyday variations in EBC in Xuzhou from May possibly 2014 to July 2016. To ensure the representativeness with the day-to-day average, only each day measurements with more than 16 hourly means are selected.The measured monthly typical EBC are shown in Figure three. Considering the representativeness and statistical significance, only the months with at least 15 efficient days are chosen to calculate the monthly typical concentration. Consequently, there’s a lack of typical data for five months: December 2014, January 2015, November 2015, December 2015 and Might 2016. The EBC concentrations inside the winter have been larger than these inside the other 3 seasons, although the concentrations within the autumn were larger than those inside the spring Figure two.and summer season. Inside ain Xuzhou from Might 2014 to to ten March make sure the representativeness of the each day Day-to-day variations in EB.
