Influences of a Quasi-stationary Front on Particulate Matter in the Low-latitude Plateau Region in China
Abstract By utilizing observation and reanalysis data and statistical methods to comprehensively assess the main characteristics of particulate matter (PM) on the low-latitude plateau (LoLaP) of southwestern China, this study analyzed the influence of the Kunming quasi-stationary front (KMQSF) on th...
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| Format: | Article |
| Language: | English |
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Springer
2020-09-01
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| Series: | Aerosol and Air Quality Research |
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| Online Access: | https://doi.org/10.4209/aaqr.2020.03.0125 |
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| author | Wenxuan Fan Jian Wu Xiaopeng Li Fangyuan Yang Bing Chen Jun Guo |
| author_facet | Wenxuan Fan Jian Wu Xiaopeng Li Fangyuan Yang Bing Chen Jun Guo |
| author_sort | Wenxuan Fan |
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| description | Abstract By utilizing observation and reanalysis data and statistical methods to comprehensively assess the main characteristics of particulate matter (PM) on the low-latitude plateau (LoLaP) of southwestern China, this study analyzed the influence of the Kunming quasi-stationary front (KMQSF) on the PM concentration during winter in this region. We found that the location and intensity of the KMQSF significantly affected the distribution pattern of the PM and induced high concentrations in some areas during a typical pollution event in 2016. Furthermore, we investigated all of the KMQSF synoptic weather that occurred from 2014 till 2019 and categorized it into nine types, which produced different pollution patterns. When the KMQSF moved westward from the center of the LoLaP, the easterly wind transported PM to the western part of the region, which led to an increase in the mean daily PM10 and PM2.5 concentrations in Kunming, a capital city in that area; simultaneously, however, the PM10 and PM2.5 levels remained high in Guiyang, a capital city in the eastern part of the LoLaP. When the KMQSF gradually retreated from the western to the eastern part of the LoLaP, the PM in Kunming dropped as the westerly wind increased in strength, whereas the PM in Guiyang continued to rise as the planetary boundary layer (PBL) height (PBLH) and boundary layer dissipation (BLD) rate decreased. When the KMQSF disappeared, temperature inversion, a shallow PBL and weak BLD across the entire region caused pollutants to accumulate, resulting in the highest mean daily PM10 and PM2.5 concentrations for both cities. |
| format | Article |
| id | doaj-art-31c40253cc594b1689b7600fa1be5608 |
| institution | Kabale University |
| issn | 1680-8584 2071-1409 |
| language | English |
| publishDate | 2020-09-01 |
| publisher | Springer |
| record_format | Article |
| series | Aerosol and Air Quality Research |
| spelling | doaj-art-31c40253cc594b1689b7600fa1be56082025-02-09T12:20:44ZengSpringerAerosol and Air Quality Research1680-85842071-14092020-09-0121111910.4209/aaqr.2020.03.0125Influences of a Quasi-stationary Front on Particulate Matter in the Low-latitude Plateau Region in ChinaWenxuan Fan0Jian Wu1Xiaopeng Li2Fangyuan Yang3Bing Chen4Jun Guo5Key Laboratory of Atmospheric Environment and Processes in the Boundary Layer over the Low-Latitude Plateau Region, Department of Atmospheric Science, Yunnan UniversityKey Laboratory of Atmospheric Environment and Processes in the Boundary Layer over the Low-Latitude Plateau Region, Department of Atmospheric Science, Yunnan UniversityMeteorological Observatory of KunmingMeteorological Observatory of KunmingKey Laboratory of Atmospheric Environment and Processes in the Boundary Layer over the Low-Latitude Plateau Region, Department of Atmospheric Science, Yunnan UniversityJiangsu Climate CenterAbstract By utilizing observation and reanalysis data and statistical methods to comprehensively assess the main characteristics of particulate matter (PM) on the low-latitude plateau (LoLaP) of southwestern China, this study analyzed the influence of the Kunming quasi-stationary front (KMQSF) on the PM concentration during winter in this region. We found that the location and intensity of the KMQSF significantly affected the distribution pattern of the PM and induced high concentrations in some areas during a typical pollution event in 2016. Furthermore, we investigated all of the KMQSF synoptic weather that occurred from 2014 till 2019 and categorized it into nine types, which produced different pollution patterns. When the KMQSF moved westward from the center of the LoLaP, the easterly wind transported PM to the western part of the region, which led to an increase in the mean daily PM10 and PM2.5 concentrations in Kunming, a capital city in that area; simultaneously, however, the PM10 and PM2.5 levels remained high in Guiyang, a capital city in the eastern part of the LoLaP. When the KMQSF gradually retreated from the western to the eastern part of the LoLaP, the PM in Kunming dropped as the westerly wind increased in strength, whereas the PM in Guiyang continued to rise as the planetary boundary layer (PBL) height (PBLH) and boundary layer dissipation (BLD) rate decreased. When the KMQSF disappeared, temperature inversion, a shallow PBL and weak BLD across the entire region caused pollutants to accumulate, resulting in the highest mean daily PM10 and PM2.5 concentrations for both cities.https://doi.org/10.4209/aaqr.2020.03.0125Particulate matterKunming quasi-stationary frontPlanetary boundary layerAtmospheric stabilityLow-latitude plateau region |
| spellingShingle | Wenxuan Fan Jian Wu Xiaopeng Li Fangyuan Yang Bing Chen Jun Guo Influences of a Quasi-stationary Front on Particulate Matter in the Low-latitude Plateau Region in China Aerosol and Air Quality Research Particulate matter Kunming quasi-stationary front Planetary boundary layer Atmospheric stability Low-latitude plateau region |
| title | Influences of a Quasi-stationary Front on Particulate Matter in the Low-latitude Plateau Region in China |
| title_full | Influences of a Quasi-stationary Front on Particulate Matter in the Low-latitude Plateau Region in China |
| title_fullStr | Influences of a Quasi-stationary Front on Particulate Matter in the Low-latitude Plateau Region in China |
| title_full_unstemmed | Influences of a Quasi-stationary Front on Particulate Matter in the Low-latitude Plateau Region in China |
| title_short | Influences of a Quasi-stationary Front on Particulate Matter in the Low-latitude Plateau Region in China |
| title_sort | influences of a quasi stationary front on particulate matter in the low latitude plateau region in china |
| topic | Particulate matter Kunming quasi-stationary front Planetary boundary layer Atmospheric stability Low-latitude plateau region |
| url | https://doi.org/10.4209/aaqr.2020.03.0125 |
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