Investigation of the Implications of “Haze Special Law” on Air Quality in South Korea
In this work, the air pollution index in three cities (Seoul, Busan, and Daegu) in South Korea was studied using multifractal detrended fluctuation analysis (MF-DFA). Hurst, Renyi, and Holder exponents were used to analyze the characteristics of the concentration time series of PM2.5 and NO2. The re...
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| Format: | Article |
| Language: | English |
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Wiley
2020-01-01
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| Series: | Complexity |
| Online Access: | http://dx.doi.org/10.1155/2020/6193016 |
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| author | Jian Wang Junseok Kim Wei Shao |
| author_facet | Jian Wang Junseok Kim Wei Shao |
| author_sort | Jian Wang |
| collection | DOAJ |
| description | In this work, the air pollution index in three cities (Seoul, Busan, and Daegu) in South Korea was studied using multifractal detrended fluctuation analysis (MF-DFA). Hurst, Renyi, and Holder exponents were used to analyze the characteristics of the concentration time series of PM2.5 and NO2. The results showed that multifractality exists in each season interval and the multifractal degree of PM2.5 is stronger than that of NO2. To investigate the effects of the implementation of the “haze special law” on February 15, 2019, we analyzed the time series of PM2.5 during the time periods from February 15, 2018, to December 16, 2018, and February 15, 2019, to December 16, 2019. We found that the multifractal spectrum width after the implementation of the law was narrower than that before the law for all the cities, which shows that the enactment of the law has played a role in improving the efficiency of air pollution control in South Korea. We also conclude that the major effects of the law will be particularly visible in larger cities. To study the main causes of multifractality, the shuffled and phase-randomized series were analyzed using MF-DFA, and the results demonstrated that the fat-tailed distribution resulted in the multifractality of the time series before and after the implementation of the “haze special law” in Seoul and Daegu, whereas long-range correlation resulted in multifractality of the series before and after the implementation of the law in Busan. |
| format | Article |
| id | doaj-art-588cf57c546f4b15bd3172064d48c8fb |
| institution | Kabale University |
| issn | 1076-2787 1099-0526 |
| language | English |
| publishDate | 2020-01-01 |
| publisher | Wiley |
| record_format | Article |
| series | Complexity |
| spelling | doaj-art-588cf57c546f4b15bd3172064d48c8fb2025-02-03T01:01:32ZengWileyComplexity1076-27871099-05262020-01-01202010.1155/2020/61930166193016Investigation of the Implications of “Haze Special Law” on Air Quality in South KoreaJian Wang0Junseok Kim1Wei Shao2Department of Mathematics, Korea University, Seoul 02841, Republic of KoreaDepartment of Mathematics, Korea University, Seoul 02841, Republic of KoreaDepartment of Economics, Korea University, Seoul 02841, Republic of KoreaIn this work, the air pollution index in three cities (Seoul, Busan, and Daegu) in South Korea was studied using multifractal detrended fluctuation analysis (MF-DFA). Hurst, Renyi, and Holder exponents were used to analyze the characteristics of the concentration time series of PM2.5 and NO2. The results showed that multifractality exists in each season interval and the multifractal degree of PM2.5 is stronger than that of NO2. To investigate the effects of the implementation of the “haze special law” on February 15, 2019, we analyzed the time series of PM2.5 during the time periods from February 15, 2018, to December 16, 2018, and February 15, 2019, to December 16, 2019. We found that the multifractal spectrum width after the implementation of the law was narrower than that before the law for all the cities, which shows that the enactment of the law has played a role in improving the efficiency of air pollution control in South Korea. We also conclude that the major effects of the law will be particularly visible in larger cities. To study the main causes of multifractality, the shuffled and phase-randomized series were analyzed using MF-DFA, and the results demonstrated that the fat-tailed distribution resulted in the multifractality of the time series before and after the implementation of the “haze special law” in Seoul and Daegu, whereas long-range correlation resulted in multifractality of the series before and after the implementation of the law in Busan.http://dx.doi.org/10.1155/2020/6193016 |
| spellingShingle | Jian Wang Junseok Kim Wei Shao Investigation of the Implications of “Haze Special Law” on Air Quality in South Korea Complexity |
| title | Investigation of the Implications of “Haze Special Law” on Air Quality in South Korea |
| title_full | Investigation of the Implications of “Haze Special Law” on Air Quality in South Korea |
| title_fullStr | Investigation of the Implications of “Haze Special Law” on Air Quality in South Korea |
| title_full_unstemmed | Investigation of the Implications of “Haze Special Law” on Air Quality in South Korea |
| title_short | Investigation of the Implications of “Haze Special Law” on Air Quality in South Korea |
| title_sort | investigation of the implications of haze special law on air quality in south korea |
| url | http://dx.doi.org/10.1155/2020/6193016 |
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