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Optical monitoring of volcanic sulphur dioxide emissions - comparison between four different remote-sensing spectroscopic techniques

Weibring, Petter LU ; Swartling, Johannes LU ; Edner, Hans LU ; Svanberg, Sune LU ; Caltabiano, T; Condarelli, D; Pantani, L and Cecchi, G (2002) In Optics and Lasers in Engineering 37(2-3). p.267-284
Abstract
The emissions of sulphur dioxide from the Italian volcanoes Mt. Etna and Stromboli were studied in ship-borne underpasses of their plumes. Four different optical spectroscopy techniques were used and inter-compared. All techniques utilise the absorption signature of the gas in the wavelength region of around 300 nm. A differential absorption lidar was employed in active gas concentration assessment. In parallel, a differential optical absorption spectroscopy system (DOAS) provided spectrally resolved absorption spectra, In one configuration the DOAS used a vertically looking telescope and the absorption of the skylight was studied, while a different DOAS implementation utilised the sun disc as the light source in slant-angle, long-path... (More)
The emissions of sulphur dioxide from the Italian volcanoes Mt. Etna and Stromboli were studied in ship-borne underpasses of their plumes. Four different optical spectroscopy techniques were used and inter-compared. All techniques utilise the absorption signature of the gas in the wavelength region of around 300 nm. A differential absorption lidar was employed in active gas concentration assessment. In parallel, a differential optical absorption spectroscopy system (DOAS) provided spectrally resolved absorption spectra, In one configuration the DOAS used a vertically looking telescope and the absorption of the skylight was studied, while a different DOAS implementation utilised the sun disc as the light source in slant-angle, long-path absorption measurements. Parallel measurements with the customary correlation spectroscopy method were also performed. Path length Monte Carlo simulations of the down-welling radiation through the volcanic plume at different sun altitude and azimuth angles have been performed taking into account also the effects of other geometric parameters as the plume height and extension. The results are discussed with special emphasis on systematic effects due to scattering. (Less)
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author
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
correlation spectroscopy, DOAS, lidar
in
Optics and Lasers in Engineering
volume
37
issue
2-3
pages
267 - 284
publisher
Elsevier
external identifiers
  • wos:000173532500014
  • scopus:0036466890
ISSN
0143-8166
DOI
10.1016/S0143-8166(01)00084-7
language
English
LU publication?
yes
id
cc0e53eb-b383-4af8-af96-4f6079dda7db (old id 344073)
date added to LUP
2007-11-16 14:58:33
date last changed
2017-08-27 04:13:45
@article{cc0e53eb-b383-4af8-af96-4f6079dda7db,
  abstract     = {The emissions of sulphur dioxide from the Italian volcanoes Mt. Etna and Stromboli were studied in ship-borne underpasses of their plumes. Four different optical spectroscopy techniques were used and inter-compared. All techniques utilise the absorption signature of the gas in the wavelength region of around 300 nm. A differential absorption lidar was employed in active gas concentration assessment. In parallel, a differential optical absorption spectroscopy system (DOAS) provided spectrally resolved absorption spectra, In one configuration the DOAS used a vertically looking telescope and the absorption of the skylight was studied, while a different DOAS implementation utilised the sun disc as the light source in slant-angle, long-path absorption measurements. Parallel measurements with the customary correlation spectroscopy method were also performed. Path length Monte Carlo simulations of the down-welling radiation through the volcanic plume at different sun altitude and azimuth angles have been performed taking into account also the effects of other geometric parameters as the plume height and extension. The results are discussed with special emphasis on systematic effects due to scattering.},
  author       = {Weibring, Petter and Swartling, Johannes and Edner, Hans and Svanberg, Sune and Caltabiano, T and Condarelli, D and Pantani, L and Cecchi, G},
  issn         = {0143-8166},
  keyword      = {correlation spectroscopy,DOAS,lidar},
  language     = {eng},
  number       = {2-3},
  pages        = {267--284},
  publisher    = {Elsevier},
  series       = {Optics and Lasers in Engineering},
  title        = {Optical monitoring of volcanic sulphur dioxide emissions - comparison between four different remote-sensing spectroscopic techniques},
  url          = {http://dx.doi.org/10.1016/S0143-8166(01)00084-7},
  volume       = {37},
  year         = {2002},
}