Air Quality Improvement in a Megacity: Implications from 2015 Beijing Parade Blue Pollution-Control Actions

Wen Xu1,2, Wei Song3, Yangyang Zhang1, Xj Liu1, Lin Zhang4, Yuanhong Zhao4, Duanyang Liu5, Aohan Tang1, Dandan Wang1, Wen Zhang6, Yuepeng Pan7, David Fowler8, Jan Willem Erisman9, Jeffrey Lee Collett Jr10, Keith Goulding11, Yi Li12 and Fusuo Zhang1, (1)CAU China Agricultural University, Beijing, China, (2)Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China, (3)Tianjin University, Tianjin, China, (4)Peking University, Department of Atmospheric and Oceanic Sciences, Beijing, China, (5)Jiangsu Meteorological Observatory, Nanjing, China, (6)BNU Beijing Normal University, Beijing, China, (7)Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing, China, (8)Center for Ecology and Hydrology Penicuik, Penicuik, United Kingdom, (9)Professor, Earth and Life Sciences, Amsterdam, Netherlands, (10)Colorado State University, Department of Atmospheric Science, Fort Collins, United States, (11)The Sustainable Soil and Grassland Systems Department, Rothamsted Research, Hertfordshire, United Kingdom, (12)Arizona Department of Environmental Quality, Phoenix, AZ, United States