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Atmos. Chem. Phys. Discuss., 9, 16361-16379, 2009
www.atmos-chem-phys-discuss.net/9/16361/2009/ doi:10.5194/acpd-9-16361-2009 © Author(s) 2009. This work is distributed under the Creative Commons Attribution 3.0 License. |
Characteristics and source apportionment of atmospheric aerosols at the summit of Mount Tai during summertime
1LAPC, Institute of Atmospheric Physics, Chinese Academy of Sciences, 100029 Beijing, China
2Zhejiang Institute of Meteorological Sciences, 310017 Hangzhou, China
Abstract. To investigate the long-range transport of air pollutants in North China, aerosol samples were collected at the summit of Mount Tai (Shandong province) in June of 2006. Water-soluble ion and metal element concentrations were analyzed using ion chromatography (IC) and inductively coupled plasma-mass spectrometry (ICP-MS), respectively. Results showed three different size distributions for the ions and metal elements characterized, including masses in: (i) the accumulation mode, with a peak at 0.43 to 1.1 μm (SO42−, NH4+, K+, Pb, Zn, Ti); (ii) the coarse particle mode, with a peak at 4.7 to 5.8 μm (Ca2+, Mg2+, Ca, Mg, Fe, Al, Ba, Mn); and (iii) a bimodal distribution, with peaks at 0.43 to 0.65 μm and 4.7 to 5.8 μm (NO3−, Na+, Cl−, Na, Co, Ni, Mo, Cu). When SO42− was in high concentration, the mass median diameter was between 0.5 μm and 0.8 μm, belonging to the "drop mode". The concentrations of SO42−, NO3−, NH4+, and K+ were quite variable. Interestingly, SO42−, NO3−, and NH4+ reached their highest concentrations when the humid air mass was coming from the south. Furthermore, crustal element concentrations increased when the air mass came from the north and pollution element concentrations were elevated when the air mass came from the south.
Citation: Xu, H., Wang, Y., Wen, T., Yang, Y., and Zhao, Y.: Characteristics and source apportionment of atmospheric aerosols at the summit of Mount Tai during summertime, Atmos. Chem. Phys. Discuss., 9, 16361-16379, doi:10.5194/acpd-9-16361-2009, 2009.