Characterization of aerosol hygroscopicity, mixing state, and CCN activity at a suburban site in the central North China Plain
<p>This study investigates aerosol hygroscopicity, mixing state, and cloud condensation nucleation as part of the Atmosphere–Aerosol–Boundary Layer–Cloud Interaction Joint Experiment performed in the summer of 2016 at Xingtai (XT), a suburban site located in the center of the North China P...
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2018-08-01
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| Series: | Atmospheric Chemistry and Physics |
| Online Access: | https://www.atmos-chem-phys.net/18/11739/2018/acp-18-11739-2018.pdf |
| id |
doaj-a85a357d51354334b38cee6872c92eb5 |
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| record_format |
Article |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
Y. Wang Z. Li Z. Li Y. Zhang W. Du W. Du F. Zhang H. Tan H. Xu T. Fan X. Jin X. Fan Z. Dong Q. Wang Y. Sun Y. Sun |
| spellingShingle |
Y. Wang Z. Li Z. Li Y. Zhang W. Du W. Du F. Zhang H. Tan H. Xu T. Fan X. Jin X. Fan Z. Dong Q. Wang Y. Sun Y. Sun Characterization of aerosol hygroscopicity, mixing state, and CCN activity at a suburban site in the central North China Plain Atmospheric Chemistry and Physics |
| author_facet |
Y. Wang Z. Li Z. Li Y. Zhang W. Du W. Du F. Zhang H. Tan H. Xu T. Fan X. Jin X. Fan Z. Dong Q. Wang Y. Sun Y. Sun |
| author_sort |
Y. Wang |
| title |
Characterization of aerosol hygroscopicity, mixing state, and CCN activity at a suburban site in the central North China Plain |
| title_short |
Characterization of aerosol hygroscopicity, mixing state, and CCN activity at a suburban site in the central North China Plain |
| title_full |
Characterization of aerosol hygroscopicity, mixing state, and CCN activity at a suburban site in the central North China Plain |
| title_fullStr |
Characterization of aerosol hygroscopicity, mixing state, and CCN activity at a suburban site in the central North China Plain |
| title_full_unstemmed |
Characterization of aerosol hygroscopicity, mixing state, and CCN activity at a suburban site in the central North China Plain |
| title_sort |
characterization of aerosol hygroscopicity, mixing state, and ccn activity at a suburban site in the central north china plain |
| publisher |
Copernicus Publications |
| series |
Atmospheric Chemistry and Physics |
| issn |
1680-7316 1680-7324 |
| publishDate |
2018-08-01 |
| description |
<p>This
study investigates aerosol hygroscopicity, mixing state, and cloud
condensation nucleation as part of the Atmosphere–Aerosol–Boundary
Layer–Cloud Interaction Joint Experiment performed in the summer of 2016 at
Xingtai (XT), a suburban site located in the center of the North China Plain
(NCP). In general, the probability density function (PDF) of the
hygroscopicity parameter (<i>κ</i>) for 40–200 nm particles had a unimodal
distribution, and mean <i>κ</i>-PDF patterns for different sizes were
similar, suggesting that the particles were highly aged and internally mixed
because of strong photochemical reactions. The <i>κ</i> calculated from the
hygroscopic growth factor in the daytime and at night suggests that
photochemical reactions largely enhanced the aerosol hygroscopicity. This
effect became weaker as the particle size increased. In addition, the aerosol
hygroscopicity was much larger at XT than at other sites in the NCP. This is
because new particle formation takes place much more frequently in the
central NCP, which is heavily polluted from industrial activities, than
elsewhere in the region. The evolution of the planetary boundary layer played
a dominant role in dictating aerosol mass concentration. Particle size was
the most important factor influencing the ability of aerosols to activate,
whereas the effect of chemical composition was secondary, especially when
supersaturation was high. Using a fixed value of <i>κ</i> = 0.31 to calculate
the cloud condensation nuclei number concentration in this region suffices.</p> |
| url |
https://www.atmos-chem-phys.net/18/11739/2018/acp-18-11739-2018.pdf |
| work_keys_str_mv |
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| _version_ |
1725102695780450304 |
| spelling |
doaj-a85a357d51354334b38cee6872c92eb52020-11-25T01:28:16ZengCopernicus PublicationsAtmospheric Chemistry and Physics1680-73161680-73242018-08-0118117391175210.5194/acp-18-11739-2018Characterization of aerosol hygroscopicity, mixing state, and CCN activity at a suburban site in the central North China PlainY. Wang0Z. Li1Z. Li2Y. Zhang3W. Du4W. Du5F. Zhang6H. Tan7H. Xu8T. Fan9X. Jin10X. Fan11Z. Dong12Q. Wang13Y. Sun14Y. Sun15State Key Laboratory of Earth Surface Processes and Resource Ecology, College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, ChinaState Key Laboratory of Earth Surface Processes and Resource Ecology, College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, ChinaDepartment of Atmospheric and Oceanic Sciences and ESSIC, University of Maryland, College Park, Maryland, USAState Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, ChinaState Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, ChinaCollege of Earth Sciences, University of Chinese Academy of Sciences, Beijing 100049, ChinaState Key Laboratory of Earth Surface Processes and Resource Ecology, College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, ChinaKey Laboratory of Regional Numerical Weather Prediction, Institute of Tropical and Marine Meteorology, China Meteorological Administration, Guangzhou 510080, ChinaShared Experimental Education Center, Sun Yat-sen University, Guangzhou 510275, ChinaState Key Laboratory of Earth Surface Processes and Resource Ecology, College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, ChinaState Key Laboratory of Earth Surface Processes and Resource Ecology, College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, ChinaState Key Laboratory of Earth Surface Processes and Resource Ecology, College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, ChinaState Key Laboratory of Earth Surface Processes and Resource Ecology, College of Global Change and Earth System Science, Beijing Normal University, Beijing 100875, ChinaCollaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters, Nanjing University of Information Science and Technology, Nanjing 210044, ChinaState Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, ChinaCollege of Earth Sciences, University of Chinese Academy of Sciences, Beijing 100049, China<p>This study investigates aerosol hygroscopicity, mixing state, and cloud condensation nucleation as part of the Atmosphere–Aerosol–Boundary Layer–Cloud Interaction Joint Experiment performed in the summer of 2016 at Xingtai (XT), a suburban site located in the center of the North China Plain (NCP). In general, the probability density function (PDF) of the hygroscopicity parameter (<i>κ</i>) for 40–200 nm particles had a unimodal distribution, and mean <i>κ</i>-PDF patterns for different sizes were similar, suggesting that the particles were highly aged and internally mixed because of strong photochemical reactions. The <i>κ</i> calculated from the hygroscopic growth factor in the daytime and at night suggests that photochemical reactions largely enhanced the aerosol hygroscopicity. This effect became weaker as the particle size increased. In addition, the aerosol hygroscopicity was much larger at XT than at other sites in the NCP. This is because new particle formation takes place much more frequently in the central NCP, which is heavily polluted from industrial activities, than elsewhere in the region. The evolution of the planetary boundary layer played a dominant role in dictating aerosol mass concentration. Particle size was the most important factor influencing the ability of aerosols to activate, whereas the effect of chemical composition was secondary, especially when supersaturation was high. Using a fixed value of <i>κ</i> = 0.31 to calculate the cloud condensation nuclei number concentration in this region suffices.</p>https://www.atmos-chem-phys.net/18/11739/2018/acp-18-11739-2018.pdf |