Multiwavelength fluorescence lidar observations of smoke plumes
<p>A five-channel fluorescence lidar was developed for the study of atmospheric aerosol. The fluorescence spectrum induced by 355 nm laser emission is analyzed in five spectral intervals using interference filters. Central wavelengths and the widths of these five interference filters are, resp...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Copernicus Publications
2023-04-01
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| Series: | Atmospheric Measurement Techniques |
| Online Access: | https://amt.copernicus.org/articles/16/2055/2023/amt-16-2055-2023.pdf |
| _version_ | 1797844781997490176 |
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| author | I. Veselovskii N. Kasianik M. Korenskii Q. Hu P. Goloub T. Podvin D. Liu |
| author_facet | I. Veselovskii N. Kasianik M. Korenskii Q. Hu P. Goloub T. Podvin D. Liu |
| author_sort | I. Veselovskii |
| collection | DOAJ |
| description | <p>A five-channel fluorescence lidar was developed for the study of atmospheric
aerosol. The fluorescence spectrum induced by 355 nm laser emission is
analyzed in five spectral intervals using interference filters. Central
wavelengths and the widths of these five interference filters are,
respectively, as follows: 438 and 29, 472 and 32, 513 and 29, 560 and 40, and 614 and 54 nm. The relative
calibration of these channels has been performed using a tungsten–halogen
lamp with a color temperature of 2800 K. This new lidar system was operated during summer–autumn 2022, when strong forest fires occurred in the Moscow
region and generated a series of smoke plumes analyzed in this study. Our
results demonstrate that, for urban aerosol, the maximal fluorescence
backscattering is observed in a 472 nm channel. For the smoke, the maximum is
shifted toward longer wavelengths, and the fluorescence backscattering
coefficients in 472, 513 and 560 nm channels have comparable values.
Thus, from the analysis of the ratios of fluorescence backscattering in
available channels, we show that it is possible to identify smoke layers.
The particle classification based on single-channel fluorescence capacity
(ratio of the fluorescence backscattering to the elastic one) has limitations
at high relative humidity (RH). The fluorescence capacity indeed
decreases when water uptake of particles enhances the elastic scattering.
However, the spectral variation of fluorescence backscattering does not
exhibit any dependence on RH and can be therefore applied to aerosol
identification.</p> |
| first_indexed | 2024-04-09T17:27:56Z |
| format | Article |
| id | doaj.art-29bdb8b1c7fb4c2fbe3dcf21185dc242 |
| institution | Directory Open Access Journal |
| issn | 1867-1381 1867-8548 |
| language | English |
| last_indexed | 2024-04-09T17:27:56Z |
| publishDate | 2023-04-01 |
| publisher | Copernicus Publications |
| record_format | Article |
| series | Atmospheric Measurement Techniques |
| spelling | doaj.art-29bdb8b1c7fb4c2fbe3dcf21185dc2422023-04-18T09:13:19ZengCopernicus PublicationsAtmospheric Measurement Techniques1867-13811867-85482023-04-01162055206510.5194/amt-16-2055-2023Multiwavelength fluorescence lidar observations of smoke plumesI. Veselovskii0N. Kasianik1M. Korenskii2Q. Hu3P. Goloub4T. Podvin5D. Liu6Prokhorov General Physics Institute, Russian Academy of Sciences, Moscow, RussiaProkhorov General Physics Institute, Russian Academy of Sciences, Moscow, RussiaProkhorov General Physics Institute, Russian Academy of Sciences, Moscow, RussiaUMR 8518 – LOA – Laboratoire d'Optique Atmosphérique, Univ. Lille, CNRS, 59650 Lille, FranceUMR 8518 – LOA – Laboratoire d'Optique Atmosphérique, Univ. Lille, CNRS, 59650 Lille, FranceUMR 8518 – LOA – Laboratoire d'Optique Atmosphérique, Univ. Lille, CNRS, 59650 Lille, FranceState Key Laboratory of Modern Optical Instrumentation, College of Optical Science and Engineering: International Research Center for Advanced Photonics, Zhejiang University, Hangzhou 310027, China<p>A five-channel fluorescence lidar was developed for the study of atmospheric aerosol. The fluorescence spectrum induced by 355 nm laser emission is analyzed in five spectral intervals using interference filters. Central wavelengths and the widths of these five interference filters are, respectively, as follows: 438 and 29, 472 and 32, 513 and 29, 560 and 40, and 614 and 54 nm. The relative calibration of these channels has been performed using a tungsten–halogen lamp with a color temperature of 2800 K. This new lidar system was operated during summer–autumn 2022, when strong forest fires occurred in the Moscow region and generated a series of smoke plumes analyzed in this study. Our results demonstrate that, for urban aerosol, the maximal fluorescence backscattering is observed in a 472 nm channel. For the smoke, the maximum is shifted toward longer wavelengths, and the fluorescence backscattering coefficients in 472, 513 and 560 nm channels have comparable values. Thus, from the analysis of the ratios of fluorescence backscattering in available channels, we show that it is possible to identify smoke layers. The particle classification based on single-channel fluorescence capacity (ratio of the fluorescence backscattering to the elastic one) has limitations at high relative humidity (RH). The fluorescence capacity indeed decreases when water uptake of particles enhances the elastic scattering. However, the spectral variation of fluorescence backscattering does not exhibit any dependence on RH and can be therefore applied to aerosol identification.</p>https://amt.copernicus.org/articles/16/2055/2023/amt-16-2055-2023.pdf |
| spellingShingle | I. Veselovskii N. Kasianik M. Korenskii Q. Hu P. Goloub T. Podvin D. Liu Multiwavelength fluorescence lidar observations of smoke plumes Atmospheric Measurement Techniques |
| title | Multiwavelength fluorescence lidar observations of smoke plumes |
| title_full | Multiwavelength fluorescence lidar observations of smoke plumes |
| title_fullStr | Multiwavelength fluorescence lidar observations of smoke plumes |
| title_full_unstemmed | Multiwavelength fluorescence lidar observations of smoke plumes |
| title_short | Multiwavelength fluorescence lidar observations of smoke plumes |
| title_sort | multiwavelength fluorescence lidar observations of smoke plumes |
| url | https://amt.copernicus.org/articles/16/2055/2023/amt-16-2055-2023.pdf |
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