Vertical Change in Extinction and Atmospheric Particle Size in the Boundary Layers over Beijing: Balloon-borne Measurement
Aerosol size and number concentration were observed in the atmospheric boundary layer over Beijing (from near the ground to 1,200 m) on March 15 (a clear day) and 16 (a dusty day), 2005. The results were further compared with lidar measurements in order to understand the dependency of extinction on...
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| Format: | Article |
| Language: | English |
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Springer
2010-12-01
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| Series: | Asian Journal of Atmospheric Environment |
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| Online Access: | http://asianjae.org/_common/do.php?a=full&b=11&bidx=1588&aidx=19983 |
| _version_ | 1797762313278717952 |
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| author | Bin Chen Guang-Yu Shi Maromu Yamada Dai-Zhou Zhang Masahiko Hayashi Yasunobu Iwasaka |
| author_facet | Bin Chen Guang-Yu Shi Maromu Yamada Dai-Zhou Zhang Masahiko Hayashi Yasunobu Iwasaka |
| author_sort | Bin Chen |
| collection | DOAJ |
| description | Aerosol size and number concentration were observed in the atmospheric boundary layer over Beijing (from near the ground to 1,200 m) on March 15 (a clear day) and 16 (a dusty day), 2005. The results were further compared with lidar measurements in order to understand the dependency of extinction on the particle size distribution and their vertical changes. The boundary layer atmosphere was composed of several sub-layers, and a dry air layer appeared between 400 and 1,000 m under the influence of dust event. In this dry air layer, the concentration of the fine-mode particles (diameter smaller than 1.0 μm) was slightly lower than the value on the clear day, while the concentration of coarse-mode particles (diameter larger than 1.0 μm) was remarkably higher than that on the clear day. This situation was attributed to the inflow of an air mass containing large amounts of Asian dust particles and a smaller amount of fine-mode particles.
The results strongly suggest that the fine-mode particles affect light extinction even in the dusty atmosphere. However, quantitatively the relation between extinction and particle concentration is not satisfied under the dusty atmospheric conditions since laser beam attenuates in the atmosphere with high concentration of particles. Laser beam attenuation effect becomes larger in the relation between extinction and coarse particle content comparing the relation between extinction and fine particle content. To clarify this problem technically, future in situ measurements such as balloon-borne lidar are suggested. Here extinction was measured at 532 nm wavelength. Measurements of extinction at other wavelengths are desired in the future. |
| first_indexed | 2024-03-12T19:25:32Z |
| format | Article |
| id | doaj.art-4166449d5f6b42c29bdb75b0f689aa04 |
| institution | Directory Open Access Journal |
| issn | 1976-6912 2287-1160 |
| language | English |
| last_indexed | 2024-03-12T19:25:32Z |
| publishDate | 2010-12-01 |
| publisher | Springer |
| record_format | Article |
| series | Asian Journal of Atmospheric Environment |
| spelling | doaj.art-4166449d5f6b42c29bdb75b0f689aa042023-08-02T04:53:12ZengSpringerAsian Journal of Atmospheric Environment1976-69122287-11602010-12-014314114910.5572/ajae.2010.4.3.141Vertical Change in Extinction and Atmospheric Particle Size in the Boundary Layers over Beijing: Balloon-borne MeasurementBin Chen0Guang-Yu Shi1Maromu Yamada2Dai-Zhou Zhang3Masahiko Hayashi4Yasunobu Iwasaka5State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, ChinaState Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics (LASG), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, ChinaCenter for Innovation, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, JapanFaculty of Environmental and Symbiotic Sciences, Prefectural University of Kumamoto, 3-1-100 Tsukide, Kumamoto 862-8502, JapanDepartment of Earth System Science, Graduate School of Science, Fukuoka University, 8-19-1 Nanakuma, Jonan-ku, Fukuoka 814-0180, JapanFrontier Science Organization, Kanazawa University, Kakuma-machi, Kanazawa 920-1192, JapanAerosol size and number concentration were observed in the atmospheric boundary layer over Beijing (from near the ground to 1,200 m) on March 15 (a clear day) and 16 (a dusty day), 2005. The results were further compared with lidar measurements in order to understand the dependency of extinction on the particle size distribution and their vertical changes. The boundary layer atmosphere was composed of several sub-layers, and a dry air layer appeared between 400 and 1,000 m under the influence of dust event. In this dry air layer, the concentration of the fine-mode particles (diameter smaller than 1.0 μm) was slightly lower than the value on the clear day, while the concentration of coarse-mode particles (diameter larger than 1.0 μm) was remarkably higher than that on the clear day. This situation was attributed to the inflow of an air mass containing large amounts of Asian dust particles and a smaller amount of fine-mode particles. The results strongly suggest that the fine-mode particles affect light extinction even in the dusty atmosphere. However, quantitatively the relation between extinction and particle concentration is not satisfied under the dusty atmospheric conditions since laser beam attenuates in the atmosphere with high concentration of particles. Laser beam attenuation effect becomes larger in the relation between extinction and coarse particle content comparing the relation between extinction and fine particle content. To clarify this problem technically, future in situ measurements such as balloon-borne lidar are suggested. Here extinction was measured at 532 nm wavelength. Measurements of extinction at other wavelengths are desired in the future.http://asianjae.org/_common/do.php?a=full&b=11&bidx=1588&aidx=19983extinctionvertical distribution of aerosolparticle sizeboundary layervisibility |
| spellingShingle | Bin Chen Guang-Yu Shi Maromu Yamada Dai-Zhou Zhang Masahiko Hayashi Yasunobu Iwasaka Vertical Change in Extinction and Atmospheric Particle Size in the Boundary Layers over Beijing: Balloon-borne Measurement Asian Journal of Atmospheric Environment extinction vertical distribution of aerosol particle size boundary layer visibility |
| title | Vertical Change in Extinction and Atmospheric Particle Size in the Boundary Layers over Beijing: Balloon-borne Measurement |
| title_full | Vertical Change in Extinction and Atmospheric Particle Size in the Boundary Layers over Beijing: Balloon-borne Measurement |
| title_fullStr | Vertical Change in Extinction and Atmospheric Particle Size in the Boundary Layers over Beijing: Balloon-borne Measurement |
| title_full_unstemmed | Vertical Change in Extinction and Atmospheric Particle Size in the Boundary Layers over Beijing: Balloon-borne Measurement |
| title_short | Vertical Change in Extinction and Atmospheric Particle Size in the Boundary Layers over Beijing: Balloon-borne Measurement |
| title_sort | vertical change in extinction and atmospheric particle size in the boundary layers over beijing balloon borne measurement |
| topic | extinction vertical distribution of aerosol particle size boundary layer visibility |
| url | http://asianjae.org/_common/do.php?a=full&b=11&bidx=1588&aidx=19983 |
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