Comparison of the imaginary parts of the atmospheric refractive index structure parameter and aerosol flux based on different measurement methods
<p>The complexity of aerosol particle properties and the diversity of characterizations make aerosol vertical transport flux measurements and analysis difficult. Although there are different methods, such as aerosol particle number concentration flux and aerosol mass flux based on the eddy cov...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2024-04-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | https://amt.copernicus.org/articles/17/2089/2024/amt-17-2089-2024.pdf |
| _version_ | 1797205913201803264 |
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| author | R. Yuan H. Zhang J. Hua H. Liu P. Wu X. Zhu J. Sun |
| author_facet | R. Yuan H. Zhang J. Hua H. Liu P. Wu X. Zhu J. Sun |
| author_sort | R. Yuan |
| collection | DOAJ |
| description | <p>The complexity of aerosol particle properties and the diversity of characterizations make aerosol vertical transport flux measurements and analysis difficult. Although there are different methods, such as aerosol particle number concentration flux and aerosol mass flux based on the eddy covariance principle as well as aerosol mass flux measurements based on the light-propagated large-aperture scintillation principle, there is a lack of mutual validation among the different methods. In this paper, a comparison of aerosol mass flux measurements based on the eddy covariance principle and aerosol mass flux measurements based on the light-propagated large-aperture scintillation principle is carried out. The key idea of aerosol mass flux measurements based on the light-propagated large-aperture scintillation principle is the determination of the imaginary part of the atmospheric equivalent refractive index structure parameter (AERISP). In this paper, we first compare the AERISPs measured by two different methods and then compare the aerosol mass vertical transport fluxes obtained by different methods. The experiments were conducted on the campus of the University of Science and Technology of China (USTC). A light propagation experiment was carried out between two tall buildings to obtain the imaginary and real parts of the AERISPs for the whole path, which in turn can be used to obtain the aerosol vertical transport flux. An updated visibility meter is installed on the meteorological tower in the middle of the light path, which is utilized to obtain the single-point visibility, which is then converted to the imaginary part of the atmospheric equivalent refractive index (AERI). The imaginary parts of the AERISP were obtained via spectral analysis with visibility data. The results show that the imaginary parts of the AERISPs obtained by different methods are in good agreement. The imaginary part of the AERI measured by the visibility meter and the vertical wind speed obtained by the ultrasonic anemometer were used for covariance calculations to obtain the aerosol vertical transport flux. The trends in aerosol vertical transport fluxes obtained by the different methods are consistent, and there are differences in some details, which may be caused by the inhomogeneity in the vertical transport of aerosol fluxes. The experimental results also showed that urban green land is a sink area for aerosol particles.</p> |
| first_indexed | 2024-04-24T08:58:40Z |
| format | Article |
| id | doaj.art-798e0a492bbb4f5d83d43b70d277983a |
| institution | Directory Open Access Journal |
| issn | 1867-1381 1867-8548 |
| language | English |
| last_indexed | 2024-04-24T08:58:40Z |
| publishDate | 2024-04-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Measurement Techniques |
| spelling | doaj.art-798e0a492bbb4f5d83d43b70d277983a2024-04-16T04:48:21ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482024-04-01172089210210.5194/amt-17-2089-2024Comparison of the imaginary parts of the atmospheric refractive index structure parameter and aerosol flux based on different measurement methodsR. Yuan0H. Zhang1J. Hua2H. Liu3P. Wu4X. Zhu5J. Sun6School of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, PR ChinaLaboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871, PR ChinaChina Meteorological Administration Xiong'an Atmospheric Boundary Layer Key Laboratory, Xiong'an New Area 071800, PR ChinaSchool of Mathematics and Physics, Anhui Jianzhu University, Hefei 230601, PR ChinaSchool of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, PR ChinaSchool of Earth and Space Sciences, University of Science and Technology of China, Hefei 230026, PR ChinaSchool of Atmospheric Sciences, Nanjing University, Nanjing 210093, PR China<p>The complexity of aerosol particle properties and the diversity of characterizations make aerosol vertical transport flux measurements and analysis difficult. Although there are different methods, such as aerosol particle number concentration flux and aerosol mass flux based on the eddy covariance principle as well as aerosol mass flux measurements based on the light-propagated large-aperture scintillation principle, there is a lack of mutual validation among the different methods. In this paper, a comparison of aerosol mass flux measurements based on the eddy covariance principle and aerosol mass flux measurements based on the light-propagated large-aperture scintillation principle is carried out. The key idea of aerosol mass flux measurements based on the light-propagated large-aperture scintillation principle is the determination of the imaginary part of the atmospheric equivalent refractive index structure parameter (AERISP). In this paper, we first compare the AERISPs measured by two different methods and then compare the aerosol mass vertical transport fluxes obtained by different methods. The experiments were conducted on the campus of the University of Science and Technology of China (USTC). A light propagation experiment was carried out between two tall buildings to obtain the imaginary and real parts of the AERISPs for the whole path, which in turn can be used to obtain the aerosol vertical transport flux. An updated visibility meter is installed on the meteorological tower in the middle of the light path, which is utilized to obtain the single-point visibility, which is then converted to the imaginary part of the atmospheric equivalent refractive index (AERI). The imaginary parts of the AERISP were obtained via spectral analysis with visibility data. The results show that the imaginary parts of the AERISPs obtained by different methods are in good agreement. The imaginary part of the AERI measured by the visibility meter and the vertical wind speed obtained by the ultrasonic anemometer were used for covariance calculations to obtain the aerosol vertical transport flux. The trends in aerosol vertical transport fluxes obtained by the different methods are consistent, and there are differences in some details, which may be caused by the inhomogeneity in the vertical transport of aerosol fluxes. The experimental results also showed that urban green land is a sink area for aerosol particles.</p>https://amt.copernicus.org/articles/17/2089/2024/amt-17-2089-2024.pdf |
| spellingShingle | R. Yuan H. Zhang J. Hua H. Liu P. Wu X. Zhu J. Sun Comparison of the imaginary parts of the atmospheric refractive index structure parameter and aerosol flux based on different measurement methods Atmospheric Measurement Techniques |
| title | Comparison of the imaginary parts of the atmospheric refractive index structure parameter and aerosol flux based on different measurement methods |
| title_full | Comparison of the imaginary parts of the atmospheric refractive index structure parameter and aerosol flux based on different measurement methods |
| title_fullStr | Comparison of the imaginary parts of the atmospheric refractive index structure parameter and aerosol flux based on different measurement methods |
| title_full_unstemmed | Comparison of the imaginary parts of the atmospheric refractive index structure parameter and aerosol flux based on different measurement methods |
| title_short | Comparison of the imaginary parts of the atmospheric refractive index structure parameter and aerosol flux based on different measurement methods |
| title_sort | comparison of the imaginary parts of the atmospheric refractive index structure parameter and aerosol flux based on different measurement methods |
| url | https://amt.copernicus.org/articles/17/2089/2024/amt-17-2089-2024.pdf |
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