Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Important role of ammonia on haze formation in Shanghai
A haze episode occurred on 12 September 2009 in Shanghai, when the mass ratio of PM1.0/PM2.5 (PM: particulate matter) reached 0.8. A similar variation of hygroscopic growth factor distribution was observed for Aitken mode particles and accumulation mode particles, implying that the enhancement of fine particles was caused by local atmospheric processing. The hygroscopicity measurements in combination with chemical analysis provided strong support for the significant contribution of (NH4)2SO4 and NH4NO3 to the haze episode. The molar ratio of [NH4+]/([NO3−] + 2[SO42 −]) rose up to 0.96, coincident with the large increase in NH3 concentration, suggesting that the available NH3 played a vital role in the enhancement of particulate sulfate and nitrate during the haze episode.
Important role of ammonia on haze formation in Shanghai
A haze episode occurred on 12 September 2009 in Shanghai, when the mass ratio of PM1.0/PM2.5 (PM: particulate matter) reached 0.8. A similar variation of hygroscopic growth factor distribution was observed for Aitken mode particles and accumulation mode particles, implying that the enhancement of fine particles was caused by local atmospheric processing. The hygroscopicity measurements in combination with chemical analysis provided strong support for the significant contribution of (NH4)2SO4 and NH4NO3 to the haze episode. The molar ratio of [NH4+]/([NO3−] + 2[SO42 −]) rose up to 0.96, coincident with the large increase in NH3 concentration, suggesting that the available NH3 played a vital role in the enhancement of particulate sulfate and nitrate during the haze episode.
Important role of ammonia on haze formation in Shanghai
Important role of ammonia on haze formation in Shanghai
Xingnan Ye (Autor:in) / Zhen Ma (Autor:in) / Jiachen Zhang (Autor:in) / Huanhuan Du (Autor:in) / Jianmin Chen (Autor:in) / Hui Chen (Autor:in) / Xin Yang (Autor:in) / Wei Gao (Autor:in) / Fuhai Geng (Autor:in)
Environmental Research Letters ; 6 ; 024019
01.04.2011
5 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
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