RE: A point-to-point response to reviewers’ comments ‘Impacts of Regional-transported Biomass Burning Emissions on Chemical and Optical Properties of Carbonaceous Aerosols in Nanjing, East

Content Provider	Semantic Scholar
Author	Liu, Xiaoyan Zhang, Yanlin Peng, Yiran Xu, Lulu Zhu, Chunmao Zhai, Xiaoyao Yang, Chunsheng Haque, Mozammel Cao, Fang Chang, Yunhua Huang, Tong Xu, Zufei Bao, Mengying Zhang, Wenqi Fan, Meiyi Lee, Xuhui
Copyright Year	2019
Abstract	Biomass burning can significantly impact the chemical and optical properties of carbonaceous aerosols. Here, the 20 biomass burning impacts were studied during wintertime in a megacity of Nanjing, East China. The high abundance of biomass burning tracers such as levoglucosan (lev), mannosan (man), galactosan (gal) and non-sea-salt potassium (nss-K+) was found during the studied period with the concentration ranges of 22.4-1476 ng m-3, 2.1-56.2 ng m-3, 1.4-32.2 ng m-3, and 0.2-3.8 μg m-3, respectively. The biomass burning contribution to WSOC and OC was in the range of 1.1-55.4 % and 0.2-53.6 %, respectively. Backward air mass origin analysis, potential emission sensitivity of element carbon (EC), and MODIS fire spot 25 information indicated that the elevations of the carbonaceous aerosols were due to the transported biomass-burning aerosols from southeastern China. The characteristic mass ratio maps of lev/man and lev/nss-K+ suggested that the biomass fuels were mainly crop residuals. Furthermore, the strong correlation (p < 0.01) between biomass burning tracers (such as lev) and light absorption coefficient (babs) for water soluble organic carbon (WSOC) revealed that biomass burning emissions played a significant role in the light-absorption properties of carbonaceous aerosols. The solar energy absorption due to water-soluble 30 brown carbon (BrC) and EC was estimated by the calculation-based on measured light-absorbing parameters and the simulation-based on a radiative transfer model (RRTMG_SW). The solar energy absorption of water-soluble BrC in short wavelengths (300-400 nm) was 0.8 ± 0.4 (0.2-2.3) W m-2 from the calculation-based and 1.2 ± 0.5 (0.3-1.9) W m-2 from the RRTMG_SW model. The absorption capacity of water-soluble BrC accounted for about 20-30% of the total absorption of EC
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Language	English
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Content Type	Text
Resource Type	Article