Ifferent cities. Study Zone Beijing Taihu Lanzhou Spring 23 7 2 Summer 13 three five Autumn 24 13 23 Winter 35 16 205. Conclusions This study utilized two years of EBC concentration measurements at seven wavelengths in an urban location in Xuzhou, China. We located that the EBC concentrations in Xuzhou during the heating Mequinol MedChemExpress season had been drastically higher than these throughout the nonheating season, and the brown carbon content throughout the heating season was higher than that throughout the nonheating season. With regards to the supply of EBC, our study shows that the supply during the heating season is mostly coal and biomass used for heating. The sources of aerosols through the nonheating season mainly consist of petroleum and other liquid sources utilised for transportation. During the period of higher EBC concentrations, the heating season was primarily concentrated during the Chinese Spring Festival, as well as the nonheating season was concentrated through periods of low rainfall. Backward trajectory analysis shows that throughout the heating season, the vast majority of EBC concentrations are derived from northern and northwestern winds. The results show that the provinces towards the north will be the most important source of EBC in Xuzhou. The possible source contribution function (PSCF) model obtains comparable final results because the backward trajectory evaluation. The majority of the heating season pollution comes from the north, and also the sources from the nonheating season are evenly distributed from the location surrounding Xuzhou. Hence, these results indicate that EBC emissions throughout the heating season in northern China, like these of Xuzhou, are high and that there is a danger that pollutants will diffuse into low-concentration areas inside the atmosphere. Though controlling EBC emissions and suppressing pollution sources, Barnidipine References consideration needs to be given to the diffusion of pollution sources.Author Contributions: Writing, visualization, formal evaluation, G.S.; methodology, W.C.; conceptualization, H.Z.; supervision, S.S.; validation, Y.W. All authors have read and agreed to the published version in the manuscript. Funding: This study was funded by the National Natural Science Foundation of China (grant number 41701391) and Essential Investigation and Development Plan of Guangxi (AB18050014). Institutional Overview Board Statement: Not applicable. Informed Consent Statement: Not applicable. Data Availability Statement: Information sharing isn’t applicable. Conflicts of Interest: The authors declare no conflict of interest.
atmosphereArticleEffects of Linewidth Broadening System on Recoil of Sodium Laser Guide StarXiangyuan Liu 1,2, , Xianmei Qian three , Rui He 1 , Dandan Liu 1 , Chaolong Cui 3 , Chuanyu Fan 1 and Hao YuanSchool of Electrical and Photoelectronic Engineering, West Anhui University, Lu’an 237012, China; [email protected] (R.H.); [email protected] (D.L.); [email protected] (C.F.); [email protected] (H.Y.) State Important Laboratory of Pulsed Power Laser Technologies, School of Electronic Countermeasures, National University of Defense Technologies, Hefei 230031, China Anhui Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Hefei 230031, China; [email protected] (X.Q.); [email protected] (C.C.) Correspondence: [email protected]; Tel.: +86-Citation: Liu, X.; Qian, X.; He, R.; Liu, D.; Cui, C.; Fan, C.; Yuan, H. Effects of Linewidth Broadening Approach on Recoil of Sodium Laser Guide Star. Atmosphere 2021, 12, 1315. https://doi.org/10.3390/ atmos12101315 Academic Editors: Nataliya V.