10th International Aerosol Conference September 2 - September 7, 2018 America's Center Convention Complex St. Louis, Missouri, USA
Abstract View
Study of the PM2.5 Growth Processes in Two Key Regions of China
Jinjin Sun, Mingjie Liang, JIANLIN HU, Qi Ying, Hongliang Zhang, Nanjing University of Information Science & Technology
Abstract Number: 19 Working Group: Air Quality in Megacities: from Sources to Control
Abstract Regional atmospheric environment pollution problems have become increasingly prominent in China in recent years, due to large amount of air pollutant emissions with the rapid economic development, the rapid growth of energy consumption and intensified urbanization. Specifically, the regions of Beijing-Tianjin-Hebei (BTH) and the Yangtze River Delta (YRD) are among the most economically developed and populated areas in China but also these regions are suffering extremely heavy air pollution. Fine particulate matter (PM2.5) is a major environmental problem in these two regions and greatly affects public health. A few case studies observed that PM2.5 could grow quickly in the two regions. The factors and processes that affect the growth processes still remain unclear.
In this study, we analyze the dynamic accumulation of PM2.5 using hourly concentration in the two regions. We focus on the PM2.5 growth processes from 35 to 150 µg/m3. We analyze all the growth processes in four years of 2013-2016 in 19 cities in the BTH and 21 cities in the YRD region. PM2.5 rising rates (PMRR) and dynamic growth duration (T) are calculated to illustrate the characteristics of the growth processes.
The results show that Beijing and Nanjing had 148 and 75 PM2.5 growth processes, respectively, during 2013-2016. The 4-year average PMRR in Beijing and Nanjing, is 5.28 µg/(m3.h), and 3.75 µg/(m3.h), respectively. Clear difference is observed between cities in BTH and YRD. Further analysis of the growth rates, associated meteorological conditions, chemical components of PM2.5 will be performed to investigate the controlling factors for different growth processes in different cities and regions.