The regional nature of nitrate-dominant haze pollution during autumn over the Pearl River Delta area
China has experienced severe haze and visibility degradation problems in recent years because of rapid urbanization and industrialization. In this study, daily atmospheric fine-aerosol samples were concurrently collected at three sites over the Pearl River Delta (PRD) region during 1–29 October 2014...
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| Format: | Article |
| Language: | English |
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KeAi Communications Co., Ltd.
2020-05-01
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| Series: | Atmospheric and Oceanic Science Letters |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/16742834.2020.1740055 |
| _version_ | 1818939589295865856 |
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| author | Junchen GUO Shengzhen ZHOU Xi SUN Minjuan HUANG Hanying DONG Ming CHANG Qi FAN Shaojia FAN Xuemei WANG |
| author_facet | Junchen GUO Shengzhen ZHOU Xi SUN Minjuan HUANG Hanying DONG Ming CHANG Qi FAN Shaojia FAN Xuemei WANG |
| author_sort | Junchen GUO |
| collection | DOAJ |
| description | China has experienced severe haze and visibility degradation problems in recent years because of rapid urbanization and industrialization. In this study, daily atmospheric fine-aerosol samples were concurrently collected at three sites over the Pearl River Delta (PRD) region during 1–29 October 2014. PM2.5 samples were analyzed for organic carbon and elemental carbon using a thermal/optical carbon analyzer. Major water-soluble inorganic ions including F−, Cl−, NO3−, SO42−, Na+, NH4+, K+, Mg2+, and Ca2+ were analyzed by ion chromatography. The results show that the temporal variations of PM2.5 concentration at the three sites were highly parallel, with particle pollution events simultaneously observed during 13–19 October (EP1) and 23–27 October (EP2), suggesting that pollution events in the PRD region are usually regional. This can most likely be attributed to the significant influences of synoptic conditions, which regionally facilitate or block diffusion of air pollutants. The chemical compositions of PM2.5 at the three sites were also found to be similar, dominated by organics and sulfates. The results indicate that accumulation of traffic emissions seems to play important roles in particle pollution for the PRD region, leading in this case to elevated nitrate contributions during both EP1 and EP2 at the three sites. Moreover, the authors found that locally emitted aerosols from biomass burning only markedly influenced the air condition at one site, Nanhai, during EP1, while regionally transported biomass burning aerosols from eastern and northern Guangdong Province influenced all three sampling sites when the PRD was dominated by polluted air from these directions during EP2. |
| first_indexed | 2024-12-20T06:26:09Z |
| format | Article |
| id | doaj.art-9e53abde780f4c449e185eddb273039a |
| institution | Directory Open Access Journal |
| issn | 1674-2834 2376-6123 |
| language | English |
| last_indexed | 2024-12-20T06:26:09Z |
| publishDate | 2020-05-01 |
| publisher | KeAi Communications Co., Ltd. |
| record_format | Article |
| series | Atmospheric and Oceanic Science Letters |
| spelling | doaj.art-9e53abde780f4c449e185eddb273039a2022-12-21T19:50:18ZengKeAi Communications Co., Ltd.Atmospheric and Oceanic Science Letters1674-28342376-61232020-05-0113325225910.1080/16742834.2020.17400551740055The regional nature of nitrate-dominant haze pollution during autumn over the Pearl River Delta areaJunchen GUO0Shengzhen ZHOU1Xi SUN2Minjuan HUANG3Hanying DONG4Ming CHANG5Qi FAN6Shaojia FAN7Xuemei WANG8Sun Yat-sen UniversitySun Yat-sen UniversitySun Yat-sen UniversitySun Yat-sen UniversitySun Yat-sen UniversityJinan UniversitySun Yat-sen UniversitySun Yat-sen UniversityJinan UniversityChina has experienced severe haze and visibility degradation problems in recent years because of rapid urbanization and industrialization. In this study, daily atmospheric fine-aerosol samples were concurrently collected at three sites over the Pearl River Delta (PRD) region during 1–29 October 2014. PM2.5 samples were analyzed for organic carbon and elemental carbon using a thermal/optical carbon analyzer. Major water-soluble inorganic ions including F−, Cl−, NO3−, SO42−, Na+, NH4+, K+, Mg2+, and Ca2+ were analyzed by ion chromatography. The results show that the temporal variations of PM2.5 concentration at the three sites were highly parallel, with particle pollution events simultaneously observed during 13–19 October (EP1) and 23–27 October (EP2), suggesting that pollution events in the PRD region are usually regional. This can most likely be attributed to the significant influences of synoptic conditions, which regionally facilitate or block diffusion of air pollutants. The chemical compositions of PM2.5 at the three sites were also found to be similar, dominated by organics and sulfates. The results indicate that accumulation of traffic emissions seems to play important roles in particle pollution for the PRD region, leading in this case to elevated nitrate contributions during both EP1 and EP2 at the three sites. Moreover, the authors found that locally emitted aerosols from biomass burning only markedly influenced the air condition at one site, Nanhai, during EP1, while regionally transported biomass burning aerosols from eastern and northern Guangdong Province influenced all three sampling sites when the PRD was dominated by polluted air from these directions during EP2.http://dx.doi.org/10.1080/16742834.2020.1740055hazechemical componentsnitratebiomass burningpearl river delta region |
| spellingShingle | Junchen GUO Shengzhen ZHOU Xi SUN Minjuan HUANG Hanying DONG Ming CHANG Qi FAN Shaojia FAN Xuemei WANG The regional nature of nitrate-dominant haze pollution during autumn over the Pearl River Delta area Atmospheric and Oceanic Science Letters haze chemical components nitrate biomass burning pearl river delta region |
| title | The regional nature of nitrate-dominant haze pollution during autumn over the Pearl River Delta area |
| title_full | The regional nature of nitrate-dominant haze pollution during autumn over the Pearl River Delta area |
| title_fullStr | The regional nature of nitrate-dominant haze pollution during autumn over the Pearl River Delta area |
| title_full_unstemmed | The regional nature of nitrate-dominant haze pollution during autumn over the Pearl River Delta area |
| title_short | The regional nature of nitrate-dominant haze pollution during autumn over the Pearl River Delta area |
| title_sort | regional nature of nitrate dominant haze pollution during autumn over the pearl river delta area |
| topic | haze chemical components nitrate biomass burning pearl river delta region |
| url | http://dx.doi.org/10.1080/16742834.2020.1740055 |
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