Impact of mixed anthropogenic and natural emissions on air quality and eco-environment—the major water-soluble components in aerosols from northwest to offshore isle
- 164 Downloads
Based on more than 300 atmospheric TSP and PM2.5 samples collected at five sites over China in 2007 and 2008, characteristics, sources, and interactions of the major water-soluble species were investigated for a better understanding of their role in urban air quality and offshore eco-environment. From the dust source regions in Northwestern China to an offshore isle over the East China Sea, concentration levels and fine/coarse particle distributions of five representative water-soluble components were well elucidated, reflecting the distinct differences of geo-history, location, and present economic situation among the target areas. NO3−/SO42− mass ratios reflected significant divergence of motorization among the studied regions. Specifically, a case study during the World Car-Free Day proved that traffic restriction measures could indeed help mitigate the aerosol species formed from vehicle emissions. Investigation on the molar concentration stoichiometry and mass percentage variations of particulate NO3−, SO42−, and NH4+ revealed that NH3 was a driving factor in the formation of major secondary water-soluble ions in atmospheric fine particles over urban areas. Based on the prevailing wind analysis, observation over an offshore isle clearly indicated the influence of the relative strength of anthropogenic sources and ocean-related natural sources on the formation and size distribution of MSA (methanesulfonic acid), a major water-soluble organic component in aerosol. Annual dry deposition flux of particulate NO3− and NH4+ over the East China Sea was estimated based on the strength of an improved calculation formula. Reductive nitrogen was found to be the major form of the deposited atmospheric inorganic nitrogen, accounting for ~ 69% of the total nitrogen depositions.
KeywordsWater-soluble component Mobile sources Ammonia/ammonium East China Sea Methanesulfonic acid Dry deposition flux
This work was supported by the National Natural Science Foundation of China (Grant Nos. 41429501 (fund for collaboration with overseas scholars), 91644105, and 41405115). Y.L.J., M.L., and Z.Z. would like to acknowledge the National Natural Science Foundation of China (21607056) and Natural Fund of Guangdong Province (2015A030313339). C.X. is sponsored by the Natural Science Foundation of Shanghai (15ZR1434900).
Y.J., K.H., and C.D. conceived the study. Y.J., K.H., G.Z., and G.Y. conducted the data analysis and wrote the paper. All authors contributed to interpreting the results and writing the manuscript.
Compliance with ethical standards
Conflict of interest
The authors declare they have no conflict of interest.
- Dong YQ, Chen CH, Huang C, Wang HL, Li L, Dai P, Jia JH (2009) Anthropogenic emissions and distribution of ammonia over the Yangtze River Delta. Acta Scien Circum 29:1611–1617 (Chinese)Google Scholar
- EPA (2003) National air Quality and emissions trends report. Office of air Quality Planning and Standards, Research Triangle Park, NCGoogle Scholar
- Huang K, Zhuang GS, Li J, Wang QZ, Sun YL, Lin YF (2010) Mixing of Asian dust with pollution aerosol and the transformation of aerosol components during the dust storm over China in spring 2007. J Geophys Res 115:1307–1314Google Scholar
- Huebert BJ, Zhuang L, Howell S, Noone K, Noone B (1996) Sulfate, nitrate, methanesulfonate, chloride, ammonium, and sodium measurements from ship, island, and aircraft during the Atlantic stratocumulus transition, experiment/marine aerosol gas exchange. J Geophys Res 101:4413–4423CrossRefGoogle Scholar
- Legrand M, Sciare J, Jourdian B, Genthon C (2001) Subdaily variations of atmospheric dimethylsulfide, dimethylsulfoxide, methanesulfonate, and non- sea-salt sulfate aerosols in the atmospheric boundary layer at Dumont d’Urvile (coastal Antarctica) during summer. J Geophys Res 106:14409–14422CrossRefGoogle Scholar
- Li J (2009) Characteristics, source, long-range transport of dust aerosol over the central Asia and its potential effect on global change. Fudan University (Chinese), DissertationGoogle Scholar
- Nakamura T, Matsumoto K, Uematsu M (2005) Chemical characteristics of aerosols transported from Asia to the East China Sea: an evaluation of anthropogenic combined nitrogen deposition in autumn. Atmos Environ 39:1749–1758Google Scholar
- Paerl HW, Whittal DR (1999) Anthropogenically-derived atmospheric nitrogen deposition, marine eutrophication and harmful algal bloom expansion: is there a link? Ambio 28:307–311Google Scholar
- Seinfeld JH, Pandis SN (2006) Atmospheric chemistry and physics: from air pollution to climate change. Wiley-Interscience, San FranciscoGoogle Scholar
- Stevens RK, King F, Bell J, Whitfield J (1988) Measurement of the chemical species that contribute to urban haze. 81st Annual Meeting of Air Pollution Control Association. Dallas, TexasGoogle Scholar
- Wang SL, Chai FH, Zhang YH, Zhou LD, Wang QL (2004) Analysis on the sources and characters of particles in Chengdu. Sci Geogr Sin 24:488–492Google Scholar
- Warneck P (1999) Chemistry of the natural atmosphere. Academic Press, LondonGoogle Scholar
- Yao J, Wang G, Lin J, Fan X, Geng Y, Wei N, Shan J, Li Y, Lu W (2010) Relationships between atmospheric particles and visibility in Shanghai. J Meteor Environ 26:17–21 (Chinese)Google Scholar