Bsolute worth of the Pearson correlation coefficient is straight proportional for the correlation. In accordance with its size, it might be divided in to the following categories: 0.eight.0 (pretty strong correlation), 0.six.eight (powerful correlation), 0.4.six (medium degree correlation), 0.2.4 (weak correlation), and 0.0.two (extremely weak correlation or no correlation) [21]. To analyze the long-distance transportation of EBCs, the possible source contribution function (PSCF) model [22] is employed Ferrous bisglycinate Epigenetic Reader Domain within this study. The model treats the pollution contribution of each and every location towards the receptor point as a ratio of your pollution trajectory for the residence time of all trajectories in the passing location and is widely utilized in analyzing the source of atmospheric pollutants. 3. Final results three.1. EBC Variation Trends The 880 nm band is generally utilized to measure normal EBC concentrations, which may be defined because the output EBC concentrations as brown carbon absorption contributes little. Concentrations measured at shorter wavelengths are usually bigger than 880 nm band concentrations due to 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 typical of your derived EBC concentrations at seven wavelengths is shown in Figure two. Thinking of representativeness, this study selected day-to-day measurements with at the least 16 h of information. In total, 651 successful everyday measurements of EBC concentrations had been obtained. Taking 880 nm because the typical EBC measurement, from May 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 . Among these seven bands, the peak worth of 370 nm was noticeably larger than that from the other bands. The variation trends of all seven wavelengths are related, with somewhat low and stable values within the summer season and autumn and rapid increases inside 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 powerful days are chosen to calculate the month-to-month typical concentration. Consequently, there’s a lack of typical information for 5 months: December 2014, January 2015, November 2015, December 2015 and Might 2016. The EBC concentrations within the winter were greater than those in the other 3 seasons, when the concentrations in the autumn had been higher than those inside the spring and summer season. Within a year, from 20 November to 10 March is considered the heating season, as well as the rest are regarded the nonheating season.Atmosphere 2021, 12,six ofFigure 2. Daily variations in EBC in Xuzhou from Might 2014 to July 2016. To ensure the representativeness from the every day typical, only each day measurements with more than 16 hourly signifies are chosen.The measured month-to-month average EBC are shown in Figure 3. Contemplating the representativeness and statistical significance, only the months with at least 15 powerful days are chosen to calculate the month-to-month average concentration. Therefore, there is a lack of typical data for 5 months: December 2014, January 2015, November 2015, December 2015 and Could 2016. The EBC concentrations within the winter were greater than these inside the other three seasons, even though the concentrations inside the autumn were larger than those inside the spring Figure 2.and summer time. Within ain Xuzhou from Might 2014 to to 10 March make certain the representativeness from the day-to-day Every day variations in EB.
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