id	author	title	date	pages	extension	mime	words	sentences	flesch	summary	cache	txt
cord-271602-f14wccj3	Kim, Hyun Cheol	Recent increase of surface particulate matter concentrations in the Seoul Metropolitan Area, Korea	2017-07-05		.txt	text/plain	3264	170	45	A 12-year (2004–2015) regional air quality simulation was conducted over East Asia (27-km) and over South Korea (9-km) to assess the impact of meteorology under constant anthropogenic emissions. Simulated PM concentrations show a strong negative correlation (i.e. R = −0.86) with regional wind speed, implying that reduced regional ventilation is likely associated with more stagnant conditions that cause severe pollutant episodes in South Korea. We conclude that the current PM concentration trend in South Korea is a combination of long-term decline by emission control efforts and short-term fluctuation of regional wind speed interannual variability. Three factors, long-term trend by emission control, short-term variation by meteorology, and sporadic offsets by unexpected social or economic episodes, seem to be affecting PM concentrations in South Korea. In order to investigate the interannual variation of surface PM concentration in the SMA, we conducted a 12-year simulation using a regional air quality modeling system.	./cache/cord-271602-f14wccj3.txt	./txt/cord-271602-f14wccj3.txt