Multiwavelength fluorescence lidar observations of smoke plumes

Veselovskii, Igor; Kasianik, Nikita; Korenskii, Mikhail; Hu, Qiaoyun; Goloub, Philippe; Podvin, Thierry; Liu, Dong

Type de document :

Article dans une revue scientifique: Article original

DOI :

10.5194/amt-16-2055-2023

URL permanente :

http://hdl.handle.net/20.500.12210/102507

Titre :

Multiwavelength fluorescence lidar observations of smoke plumes

Auteur(s) :

Veselovskii, Igor [Auteur]
A. M. Prokhorov General Physics Institute [GPI]
Kasianik, Nikita [Auteur]
A. M. Prokhorov General Physics Institute [GPI]
Korenskii, Mikhail [Auteur]
A. M. Prokhorov General Physics Institute [GPI]
Hu, Qiaoyun [Auteur]

Laboratoire d’Optique Atmosphérique - UMR 8518 [LOA]
Goloub, Philippe [Auteur]

Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518
Podvin, Thierry [Auteur]
Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518
Liu, Dong [Auteur]
Zhejiang Gongshang University [Hangzhou] [ZJSU]

Titre de la revue :

Atmospheric Measurement Techniques

Nom court de la revue :

Atmos. Meas. Tech.

Numéro :

Pagination :

Date de publication :

2023-05-12

ISSN :

1867-1381

Discipline(s) HAL :

Planète et Univers [physics]/Océan, Atmosphère

Résumé en anglais : [en]

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 ...
Lire la suite >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.Lire moins >

Langue :

Anglais

Audience :

Internationale

Vulgarisation :

Non

Établissement(s) :

Université de Lille
CNRS

Collections :

Laboratoire d'Optique Atmosphérique (LOA) - UMR 8518

Date de dépôt :

2024-01-16T22:59:13Z
2024-02-12T10:33:14Z

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Numéro de version	Lien	Date de modification
2	20.500.12210/102507*	2024-02-12T10:28:40Z
1	20.500.12210/102507.1	2024-01-16T22:59:13Z

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