Ground-Based MAX-DOAS Measurements of Tropospheric Aerosols, NO<sub>2,</sub> and HCHO Distributions in the Urban Environment of Shanghai, China
Aerosol extinction profiles at 550 nm were retrieved by applying multi-axis differential optical absorption spectroscopy (MAX-DOAS) and lookup table. Then the tropospheric NO<sub>2</sub> and HCHO vertical column densities were retrieved using a two-step method from 28 July to 5 August of...
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MDPI AG
2022-04-01
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| Series: | Remote Sensing |
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| Online Access: | https://www.mdpi.com/2072-4292/14/7/1726 |
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| author | Haoyue Wang Wanlin Wei Huizheng Che Xiao Tang Jianchun Bian Ke Yu Weiguo Wang |
| author_facet | Haoyue Wang Wanlin Wei Huizheng Che Xiao Tang Jianchun Bian Ke Yu Weiguo Wang |
| author_sort | Haoyue Wang |
| collection | DOAJ |
| description | Aerosol extinction profiles at 550 nm were retrieved by applying multi-axis differential optical absorption spectroscopy (MAX-DOAS) and lookup table. Then the tropospheric NO<sub>2</sub> and HCHO vertical column densities were retrieved using a two-step method from 28 July to 5 August of 2015 in Shanghai. The retrieved results were compared with the satellite products, and then their diurnal variation was observed. A consistency check was performed before the inversion to obtain a correction factor. Based on the sensitivity of geometric angles to oxygen dimer air mass factor (O<sub>4</sub> AMF, AMF is the ratio of the slanted column density to the vertical column density), the parameterization scheme of geometric angles in the lookup table is optimized. The results show that the aerosol increased significantly in the afternoon. The diurnal variation of tropospheric NO<sub>2</sub> and HCHO vertical column densities (VCDs) are bimodal and unimodal patterns respectively, and their values are higher than those of GOME-2 and OMI satellite products. A process of aerosol reduction and recovery are related to ground particulates and meteorological elements. The chemical sensitivity of local ozone production also has a clear diurnal variation. |
| first_indexed | 2024-03-09T11:27:58Z |
| format | Article |
| id | doaj.art-dbf2d11c6c5f4990809d01ae6e6ae347 |
| institution | Directory Open Access Journal |
| issn | 2072-4292 |
| language | English |
| last_indexed | 2024-03-09T11:27:58Z |
| publishDate | 2022-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Remote Sensing |
| spelling | doaj.art-dbf2d11c6c5f4990809d01ae6e6ae3472023-11-30T23:58:07ZengMDPI AGRemote Sensing2072-42922022-04-01147172610.3390/rs14071726Ground-Based MAX-DOAS Measurements of Tropospheric Aerosols, NO<sub>2,</sub> and HCHO Distributions in the Urban Environment of Shanghai, ChinaHaoyue Wang0Wanlin Wei1Huizheng Che2Xiao Tang3Jianchun Bian4Ke Yu5Weiguo Wang6Department of Atmospheric Sciences, Yunnan University, Kunming 650500, ChinaDepartment of Atmospheric Sciences, Yunnan University, Kunming 650500, ChinaState Key Laboratory of Severe Weather (LASW), Chinese Academy of Meteorological Sciences (CAMS), Beijing 100081, ChinaState Key Laboratory of Atmospheric Boundary Layer Physics and Atmospheric Chemistry (LAPC), Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, ChinaKey Laboratory of Middle Atmosphere and Global Environment Observation, Institute of Atmospheric Physics, Chinese Academy of Sciences, Beijing 100029, ChinaYunnan Meteorological Information Center, Kunming 650032, ChinaDepartment of Atmospheric Sciences, Yunnan University, Kunming 650500, ChinaAerosol extinction profiles at 550 nm were retrieved by applying multi-axis differential optical absorption spectroscopy (MAX-DOAS) and lookup table. Then the tropospheric NO<sub>2</sub> and HCHO vertical column densities were retrieved using a two-step method from 28 July to 5 August of 2015 in Shanghai. The retrieved results were compared with the satellite products, and then their diurnal variation was observed. A consistency check was performed before the inversion to obtain a correction factor. Based on the sensitivity of geometric angles to oxygen dimer air mass factor (O<sub>4</sub> AMF, AMF is the ratio of the slanted column density to the vertical column density), the parameterization scheme of geometric angles in the lookup table is optimized. The results show that the aerosol increased significantly in the afternoon. The diurnal variation of tropospheric NO<sub>2</sub> and HCHO vertical column densities (VCDs) are bimodal and unimodal patterns respectively, and their values are higher than those of GOME-2 and OMI satellite products. A process of aerosol reduction and recovery are related to ground particulates and meteorological elements. The chemical sensitivity of local ozone production also has a clear diurnal variation.https://www.mdpi.com/2072-4292/14/7/1726multi-axisdifferential optical absorption spectroscopylookup tableaerosol extinction coefficient profiletropospheric vertical column densities |
| spellingShingle | Haoyue Wang Wanlin Wei Huizheng Che Xiao Tang Jianchun Bian Ke Yu Weiguo Wang Ground-Based MAX-DOAS Measurements of Tropospheric Aerosols, NO<sub>2,</sub> and HCHO Distributions in the Urban Environment of Shanghai, China Remote Sensing multi-axis differential optical absorption spectroscopy lookup table aerosol extinction coefficient profile tropospheric vertical column densities |
| title | Ground-Based MAX-DOAS Measurements of Tropospheric Aerosols, NO<sub>2,</sub> and HCHO Distributions in the Urban Environment of Shanghai, China |
| title_full | Ground-Based MAX-DOAS Measurements of Tropospheric Aerosols, NO<sub>2,</sub> and HCHO Distributions in the Urban Environment of Shanghai, China |
| title_fullStr | Ground-Based MAX-DOAS Measurements of Tropospheric Aerosols, NO<sub>2,</sub> and HCHO Distributions in the Urban Environment of Shanghai, China |
| title_full_unstemmed | Ground-Based MAX-DOAS Measurements of Tropospheric Aerosols, NO<sub>2,</sub> and HCHO Distributions in the Urban Environment of Shanghai, China |
| title_short | Ground-Based MAX-DOAS Measurements of Tropospheric Aerosols, NO<sub>2,</sub> and HCHO Distributions in the Urban Environment of Shanghai, China |
| title_sort | ground based max doas measurements of tropospheric aerosols no sub 2 sub and hcho distributions in the urban environment of shanghai china |
| topic | multi-axis differential optical absorption spectroscopy lookup table aerosol extinction coefficient profile tropospheric vertical column densities |
| url | https://www.mdpi.com/2072-4292/14/7/1726 |
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