atmosphere Communication A New Type of Haze? The December 2015 Purple (Magenta) Haze Event in Nanjing, China Duanyang Liu 1,2,*, Xuejun Liu 3, Hongbin Wang 1, Yi Li 4, Zhiming Kang 2, Lu Cao 2, Xingna Yu 5 and Hao Chen 2 1 Key Laboratory of Transportation Meteorology, China Meteorological Administration, Nanjing 210008, China;
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[email protected] (Z.K.);
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[email protected] (H.C.) 3 College of Resources and Environmental Sciences, China Agricultural University, Beijing 100193, China;
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[email protected]; Tel.: +86-25-8328-7206 Academic Editors: Yuxuan Wang and Robert W. Talbot Received: 25 December 2016; Accepted: 6 April 2017; Published: 14 April 2017 Abstract: A special and unusual purple (magenta) haze episode was observed in Nanjing, China, at 17:00 on 22 December 2015. Many local and national news outlets reported this event. Based on an analysis of the pollution features and meteorological factors, including boundary layer characteristics, we concluded that this haze event was similar in most respects to other local haze episodes. We discuss the reasons and the possibilities about this rare color haze at the end of the paper. One way to attain a combination of blue and red light is to have the green wavelengths selectively absorbed, and this seems unlikely for typical atmospheric constituents.