AAAR 34th Annual Conference
October 12 - October 16, 2015
Hyatt Regency
Minneapolis, Minnesota, USA
Abstract View
Air Quality in the Beijing-Tianjin-Hebei Region before, during and after 2014 Beijing APEC Economic Leaders' Meeting
YANG HUA, Shuxiao Wang, Jiandong Wang, Jingkun Jiang, Wei Zhou, Xiaoqing Tang, Tsinghua University
Abstract Number: 194 Working Group: Haze in China: Sources, Formation Mechanisms, and Current Challenges
Abstract A strict air pollution control plan was carried out for 2014 Beijing APEC (Asia-Pacific Economic Cooperation) Economic Leaders' Meeting in the Beijing-Tianjin-Hebei (BTH) Region. Joint field campaigns were conducted from October to November, 2014, to observe the impact of control plan on the air quality. Particulate matter samples (PM$_(2.5)), PM$_(10), gaseous pollutants and meteorology data were collected at eight stations in Beijing, Tianjin, Langfang, Baoding and Shijiazhuang of the BTH Region. Chemical compositions of PM$_(2.5) were analyzed. Four pollution episodes during this period were selected and investigated. It was found the average PM$_(2.5) mass concentrations before and during the control plan were 73-128 µg/m$^3 and 47-99 µg/m$^3, respectively. Mass concentrations of NO$_x, CO, SO$_2 decreased during the APEC meeting while concentration of O$_3 increased. Concentration of nitrate, sulfate, ammonium and organic matters of PM$_(2.5) decreased the most during the APEC meeting. Concentration of PM$_(2.5) were 52-137µg/m$^3 after the APEC meeting when the control plan ended. Different characteristics of pollutants during different episodes illustrated the great influence of control plan on air quality.