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Title: Concentration Variations in Particulate Matter in Seoul Associated with Asian Dust and Smog Episodes

In this study, particulate species were measured in April–May 2003 at two sites, one in the megacity of Seoul and the other in the Deokjeok Island to the west of Seoul, to examine the effects of long-range transport under the influence of prevailing westerlies. The effects of Asian dust were observed in April, and a severe smog episode occurred in late May. During May, all air pollutants showed negative correlations with wind speed at Seoul, particularly for NO 2 and CO, a large proportion of which result from vehicle emissions. SO 4 2– continued to increase in association with an inflow of air pollutants from China with heavy use of coal, with fluctuations depending on wind speed. The smog episode in late May occurred as emissions from Siberian forest fires were superimposed on pollutant inflows from China that had persisted since early May and local emissions accumulated under stagnant conditions. During the episode, Siberian forest fires increased K + while local emissions primarily from vehicles increased NO 3 , OC, and EC. The effects of an inflow of air pollutants from the outside were significant at Deokjeok, with small local emissions, resulting in substantial increases in Ca 2+ during themore » Asian dust event and SO 4 2– during the smog episode, compared to those at Seoul. Because both sites were strongly influenced by the effects of long-range transport in May, PM 2.5 along with SO 4 2– and K + exhibited a strong correlation between Seoul and Deokjeok.« less
Authors:
 [1] ;  [2] ;  [3]
  1. Hankuk Univ. of Foreign Studies, Gyeonggi (Korea)
  2. Korea Institute of Science and Technology, Seoul (Korea)
  3. Argonne National Lab. (ANL), Argonne, IL (United States)
Publication Date:
Grant/Contract Number:
AC02-06CH11357
Type:
Accepted Manuscript
Journal Name:
Aerosol and Air Quality Research
Additional Journal Information:
Journal Volume: 17; Journal Issue: 12; Journal ID: ISSN 1680-8584
Publisher:
Chinese Association for Aerosol Research in Taiwan
Research Org:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org:
Korea Meteorological Administration Research and Development Program; National Research Foundation of Korea (NRF); USDOE
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; Asian dust; Coal combustion; Local emissions; Long-range transport; Russian forest fires; Siberian forest fires
OSTI Identifier:
1411024