Abstract
Hourly PM10 mass concentrations were collected from 25 air quality monitoring stations in Seoul, Korea. Sixteen years of data, from 2000 to 2015, were analyzed. During that time, the annual average PM10 concentrations declined almost linearly at a rate of −1.98 μg m−3 year−1. The number of high PM10 days declined faster than did the number of low PM10 days. This indicates that the bulk of the annual average PM10 mass concentration reduction was high-level PM10 concentrations. Further analysis of this data revealed two interesting points. First, though the annual average PM10 concentrations clearly lowered for period 1 (from 2000 to 2012; −2.28 μg m−3 year−1), they remained almost unchanged at a virtually constant value for period 2 (from 2012 to 2015; −0.02 μg m−3 year−1). Second, annual average PM10 concentrations showed a large spatial concentration gradient among all monitoring stations in the early 2000s. However, the spatial concentration gradient got gradually smaller until reaching a nearly no-gradient, uniform concentration among all monitoring stations from 2010 onward. Clear PM10 concentration reduction in period 1 was driven by local emission reduction. However, its reduction was not enough in period 2. The reduction of local emissions was negated by the increase of local activities and transported particulates, as well as the formation of secondary aerosol in Seoul from emissions transported from upwind regional sources. This resulted in PM10 concentrations becoming stagnant in period 2. PM10 reduction rate in the downwind area was faster than that in the upwind area. For the first 5 years, the reduction rate in the downwind area was great. Between all the stations observed, nearly all of the concentration difference was a result of more reduction in secondary aerosol. After 2005, coarse particles and primary elemental carbon (EC) played a key role in reducing the PM10 concentration. Our findings on these two data features, and their causes, will help people to understand the most recent characteristics of particulate matters, in turn helping to update the control strategy for the continued improvement of particulate air quality in Seoul.
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References
Ahmed E, Kim K-H, Shon Z-H, Song S-K (2015) Long-term trend of airborne particulate matter in Seoul, Korea from 2004 to 2013. Atmos Environ 101:125–133. doi:10.1016/j.atmosenv.2014.11.024
Anderson A, Deng J, Du K, Zheng M, Yan C, Sköld M, Gustafsson Ö (2015) Regionally-varying combustion sources of the January 2013 severe haze events over eastern China. Environ Sci Technol 49:2038–2043. doi:10.1021/es503855e
Brook RD, Franklin B, Cascio W, Hong Y, Howard G, Lipsett M, Luepker R, Mittleman M, Samet J, Smith SC, Tager I (2004) Air pollution and cardiovascular disease. Circulation 109:2655–2671. doi:10.1161/01.CIR.0000128587.30041.C8
Chan CK, Yao X (2008) Air pollution in mega cities in China. Atmos Environ 42:1–42. doi:10.1016/j.atmosenv.2007.09.003
Chang CT, Tsai CJ (2003) A model for the relative humidity effect on the readings of the PM10 beta-gauge monitor. J Aerosol Sci 34:1685–1697. doi:10.1016/S0021-8502(03)00356-2
Chen B, Kan H (2008) Air pollution and population health: a global challenge. Environ Health Prev Med 13:94–101. doi:10.1007/s12199-007-0018-5
Du Y, Li T (2016) Assessment of health-based economic costs linked to fine particulate (PM2.5) pollution: a case study of haze during January 2013 in Beijing, China. Air Qual Atmos Health 9:439–445. doi:10.1007/s11869-015-0387-7
Fajersztajn L, Veras M, Barrozo LV, Saldiva P (2013) Air pollution: a potentially modifiable risk factor for lung cancer. Nat Rev Cancer 13:674–678. doi:10.1038/nrc3572
Jung JH, Kim SR, Choi BR, Kim KS, Huh JB, Yi SM, Han YJ (2009) A study on the characteristics of carbonaceous compounds in PM2.5 measured in Chuncheon and Seoul. J Korea Soc Atmos Environ 25:141–153. doi:10.5572/KOSAE.2009.25.2.141 (in Korean with English abstract)
Kang CM, Kang BW, Lee HS (2006) Source identification and trends in concentrations of gaseous and fine particulate principal species in Seoul, South Korea. J Air Waste Manage Assoc 56:911–921. doi:10.1080/10473289.2006.10464506
Kim YP (2006) Air pollution in Seoul caused by aerosols. J Korea Soc Atmos Environ 22:535–553 (in Korean with English abstract)
Kim JY, Ghim YS (2002) Effects of the density of meteorological observations on the diagnostic wind fields and the performance of photochemical modeling in the greater Seoul area. Atmos Environ 36:201–212. doi:10.1016/S1352-2310(01)00443-5
Kim YP, Yeo MJ (2013) The trend of the concentrations of the criteria pollutants over Seoul. J Korea Soc Atmos Environ 29:369–377 (in Korean with English abstract)
Kim HS, Huh JB, Hopke PK, Holsen TM, Yi SM (2007a) Characteristics of the major chemical constituents of PM2.5 and smog events in Seoul, Korea in 2003 and 2004. Atmos Environ 41:6762–6770. doi:10.1016/j.atmosenv.2007.04.060
Kim S-W, Yoon S-C, Kim J, Kim S-Y (2007b) Seasonal and monthly variations of columnar aerosol optical properties over east Asia determined from multi-year MODIS, LIDAR, and AERONET sun/sky radiometer measurements. Atmos Environ 41:1634–1651. doi:10.1016/j.atmosenv.2006.10.044
Kim KH, Pandey SK, Nguyen HT, Chung SY, Cho SJ, Kim MY, Oh JM, Sunwoo Y (2010) Long-term behavior of particulate matters at urban roadside and background locations in Seoul, Korea. Transp Res Part D: Transp Environ 15:168–174. doi:10.1016/j.trd.2009.12.001
Kim BM, Seo J, Kim JY, Lee JY, Kim Y (2016a) Transported vs. local contributions from secondary and biomass burning sources to PM2.5. Atmos Environ 144:24–36
Kim H-S, Chung Y-S, Yoon M-B (2016b) An analysis on the impact of large-scale transports of dust pollution on air quality in East Asia as observed in central Korea in 2014. Air Qual Atmos Health 9:83–93. doi:10.1007/s11869-014-0312-5
Lee HW, Choi HJ, Lee SH, Kim YK, Jung WS (2008) The impact of topography and urban building parameterization on the photochemical ozone concentration of Seoul, Korea. Atmos Environ 42:4232–4246. doi:10.1016/j.atmosenv.2008.01.021
Lee S, Ho CH, Choi YS (2011) High-PM10 concentration episodes in Seoul, Korea: background sources and related meteorological conditions. Atmos Environ 45:7240–7247. doi:10.1016/j.atmosenv.2011.08.071
Lee S, Ho CH, Lee YG, Choi HJ, Song CK (2013) Influence of transboundary air pollutants from China on the high-PM10 episode in Seoul, Korea for the period October 16–20, 2008. Atmos Environ 77:430–439. doi:10.1016/j.atmosenv.2013.05.006
Liu XG, Li J, Qu Y, Han T, Hou L, Gu J, Chen C, Yang Y, Liu X, Yang T, Zhang Y, Tian H, Hu M (2013) Formation and evolution mechanism of regional haze: a case study in the megacity Beijing, China. Atmos Chem Phys 13:4501–4514. doi:10.5194/acp-13-4501-2013
Oh HR, Ho CH, Kim J, Chen D, Lee S, Choi YS, Chang LS, Song CK (2015) Long-range transport of air pollutants originating in China: a possible major cause of multi-day high-PM 10 episodes during cold season in Seoul, Korea. Atmos Environ 109:23–30
Park SM, Moon KJ, Park JS, Kim HJ, Ahn JY, Kim JS (2012) Chemical characteristics of ambient aerosol during Asian dusts and high PM episodes at Seoul intensive monitoring site in 2009. J Korea Soc Atmos Environ 28:282–293. doi:10.5572/KOSAE.2012.28.3.282 (in Korean with English abstract)
Seoul Metropolitan Government (2015) Seoul statistical yearbook. Seoul. Available at http://stat.seoul.go.kr/jsp3/stat.book.jsp?link=6&cot=009. Accessed 17 May 2017
Sharma AP, Kim K, Ahn J, Shon Z, Sohn J, Lee J, Ma C, Brown RJC (2014) Ambient particulate matter (PM10) concentrations in major urban areas of Korea during 1996–2010. Atmos Pollut Res 5:161–169. doi:10.5094/APR.2014.020
Shon ZH, Kim KH, Song SK, Jung K, Kim NJ, Lee JB (2012) Relationship between water-soluble ions in PM2.5 and their precursor gases in Seoul megacity. Atmos Environ 59:540–550. doi:10.1016/j.atmosenv.2012.04.033
The Seoul Institute (2013) Geographical Atlas of Seoul. The Seoul Research Data Service. Available at http://data.si.re.kr/node/51. Accessed 17 May 2017
Uno I, Sugimoto N, Shimizu A, Yumimoto K, Hara Y, Wang Z (2014) Record heavy PM 2.5 air pollution over China in January 2013: vertical and horizontal dimensions. SOLA 10:136–140
Wang LT, Wei Z, Yang J, Zhang Y, Zhang FF, Su J, Meng CC, Zhang Q (2014) The 2013 severe haze over southern Hebei, China: model evaluation, source apportionment, and policy implications. Atmos Chem Phys 14:3151–3173. doi:10.5194/acp-14-3151-2014
Yoo SH, Kwak SJ, Lee JS (2008) Using a choice experiment to measure the environmental costs of air pollution impacts in Seoul. J Environ Manag 86:308–318. doi:10.1016/j.jenvman.2006.12.008
Acknowledgments
This study was supported by the Korea Meteorological Administration Research and Development Program under Grant KMIPA 2015-2011 and the Basic Science Research Program through the National Research Foundation of Korea (NRF) founded by the Ministry of Science (2013R1A1A1006210).
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Heo, J., Park, JS., Kim, B.M. et al. Two notable features in PM10 data and analysis of their causes. Air Qual Atmos Health 10, 991–998 (2017). https://doi.org/10.1007/s11869-017-0488-6
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DOI: https://doi.org/10.1007/s11869-017-0488-6