The impact of particulate pollution control on aerosol hygroscopicity and CCN activity in North China
Air quality has greatly improved in China owing to the strict control policy enforced during the last decade. This study investigated the impact of particulate pollution control on aerosol hygroscopicity and cloud condensation nuclei (CCN) activity in North China based on several data sources. The m...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | Environmental Research Letters |
| Subjects: | |
| Online Access: | https://doi.org/10.1088/1748-9326/acde91 |
| _version_ | 1827869751827759104 |
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| author | Yuxiang Wang Yuying Wang Xiaorui Song Yi Shang Yunxiang Zhou Xin Huang Zhanqing Li |
| author_facet | Yuxiang Wang Yuying Wang Xiaorui Song Yi Shang Yunxiang Zhou Xin Huang Zhanqing Li |
| author_sort | Yuxiang Wang |
| collection | DOAJ |
| description | Air quality has greatly improved in China owing to the strict control policy enforced during the last decade. This study investigated the impact of particulate pollution control on aerosol hygroscopicity and cloud condensation nuclei (CCN) activity in North China based on several data sources. The mass concentration of particles with an aerodynamic diameter smaller than 2.5 µ m (PM _2.5 ) decreased by one third from the summer of 2014 to the summer of 2020 in Xinzhou (XZ). The mass fractions of aerosol chemical components in PM _2.5 also clearly changed, showing an increase in hydrophilic inorganics and a decrease in hydrophobic organics and black carbon from 2014 to 2020. Measurements of the particle number size distribution in XZ indicate that the occurrence frequency of new particle formation (NPF) events decreased significantly from 2014 to 2020, leading to a reduction in the generation of daytime ultrafine particles. The weakened NPF and increasing influence of morning and evening peak emissions modified the diurnal variations of the number concentration of condensation nuclei ( N _CN ) and CCN ( N _CCN ). The aerosol activation ratio was always higher in the summer of 2014 than in the summer of 2020. These results demonstrate that particulate pollution control can decrease N _CN and N _CCN but enhance aerosol hygroscopicity and activation ability. |
| first_indexed | 2024-03-12T15:48:34Z |
| format | Article |
| id | doaj.art-0bf314d9d81445e1932148be9cc4929c |
| institution | Directory Open Access Journal |
| issn | 1748-9326 |
| language | English |
| last_indexed | 2024-03-12T15:48:34Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | Environmental Research Letters |
| spelling | doaj.art-0bf314d9d81445e1932148be9cc4929c2023-08-09T15:18:12ZengIOP PublishingEnvironmental Research Letters1748-93262023-01-0118707402810.1088/1748-9326/acde91The impact of particulate pollution control on aerosol hygroscopicity and CCN activity in North ChinaYuxiang Wang0Yuying Wang1https://orcid.org/0000-0001-9762-8563Xiaorui Song2Yi Shang3Yunxiang Zhou4Xin Huang5Zhanqing Li6Key Laboratory for Aerosol‐Cloud Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science & Technology , Nanjing 210044, People’s Republic of ChinaKey Laboratory for Aerosol‐Cloud Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science & Technology , Nanjing 210044, People’s Republic of China; State Key Laboratory of Remote Sensing Science, College of Global Change and Earth System Science, Beijing Normal University , Beijing 100875, People’s Republic of ChinaKey Laboratory for Aerosol‐Cloud Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science & Technology , Nanjing 210044, People’s Republic of ChinaKey Laboratory for Aerosol‐Cloud Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science & Technology , Nanjing 210044, People’s Republic of ChinaKey Laboratory for Aerosol‐Cloud Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science & Technology , Nanjing 210044, People’s Republic of ChinaKey Laboratory for Aerosol‐Cloud Precipitation of China Meteorological Administration, School of Atmospheric Physics, Nanjing University of Information Science & Technology , Nanjing 210044, People’s Republic of ChinaEarth System Science Interdisciplinary Center and Department of Atmospheric and Oceanic Science, University of Maryland , College Park, MD, United States of AmericaAir quality has greatly improved in China owing to the strict control policy enforced during the last decade. This study investigated the impact of particulate pollution control on aerosol hygroscopicity and cloud condensation nuclei (CCN) activity in North China based on several data sources. The mass concentration of particles with an aerodynamic diameter smaller than 2.5 µ m (PM _2.5 ) decreased by one third from the summer of 2014 to the summer of 2020 in Xinzhou (XZ). The mass fractions of aerosol chemical components in PM _2.5 also clearly changed, showing an increase in hydrophilic inorganics and a decrease in hydrophobic organics and black carbon from 2014 to 2020. Measurements of the particle number size distribution in XZ indicate that the occurrence frequency of new particle formation (NPF) events decreased significantly from 2014 to 2020, leading to a reduction in the generation of daytime ultrafine particles. The weakened NPF and increasing influence of morning and evening peak emissions modified the diurnal variations of the number concentration of condensation nuclei ( N _CN ) and CCN ( N _CCN ). The aerosol activation ratio was always higher in the summer of 2014 than in the summer of 2020. These results demonstrate that particulate pollution control can decrease N _CN and N _CCN but enhance aerosol hygroscopicity and activation ability.https://doi.org/10.1088/1748-9326/acde91North ChinaCCNaerosol hygroscopicityactivation ability |
| spellingShingle | Yuxiang Wang Yuying Wang Xiaorui Song Yi Shang Yunxiang Zhou Xin Huang Zhanqing Li The impact of particulate pollution control on aerosol hygroscopicity and CCN activity in North China Environmental Research Letters North China CCN aerosol hygroscopicity activation ability |
| title | The impact of particulate pollution control on aerosol hygroscopicity and CCN activity in North China |
| title_full | The impact of particulate pollution control on aerosol hygroscopicity and CCN activity in North China |
| title_fullStr | The impact of particulate pollution control on aerosol hygroscopicity and CCN activity in North China |
| title_full_unstemmed | The impact of particulate pollution control on aerosol hygroscopicity and CCN activity in North China |
| title_short | The impact of particulate pollution control on aerosol hygroscopicity and CCN activity in North China |
| title_sort | impact of particulate pollution control on aerosol hygroscopicity and ccn activity in north china |
| topic | North China CCN aerosol hygroscopicity activation ability |
| url | https://doi.org/10.1088/1748-9326/acde91 |
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