Differential Optical Absorption Spectroscopy (DOAS) Measurements of Ozone in the 280–290 nm Wavelength Region

Abstract

The differential absorption structure of the ozone spectrum between 250 and 330 nm has been investigated in order to determine the optimal wavelength region to be utilized for active differential optical absorption spectroscopy (DOAS) measurements. Considering aspects of atmospheric attenuation and interference from other species as well as the magnitude of the differential absorption cross section, an interval around 283 nm was found to be a good candidate for this application. This result was also verified during 12 months of continuous ozone monitoring in an urban environment.

Differential optical absorption spectroscopy (DOAS) system for urban atmospheric pollution monitoring

“…Haze can occasionally scatter sunlight into the receiving telescope but this effect can be compensated for in the retroreflector concept; the lamp is blocked while the scattered sunlight is measured and this signal can then be subtracted from the measurements. The atmospheric turbulence makes it necessary to measure all wavelengths simultaneously or to freeze the atmosphere by measuring the spectrum quickly enough.1 8 The first approach is implemented with photodiode or CCD arrays, and has the big advantage of good light economy. Disadvantages are the sensitivity variations between different pixels and also within each pixel.…”

Retrieval of stratospheric O3 and NO2 profiles from Odin Optical Spectrograph and Infrared Imager System (OSIRIS) limb‐scattered sunlight measurements

“…Different atmospheric species leave their absorption “fingerprints” in the spectra, from which concentrations can be retrieved. DOAS has been used in ground‐based and satellite applications, for both active and passive instruments [i.e., Axelsson et al , 1990; Platt , 1994; Burrows et al , 1999; Pfeilsticker et al , 2001]. The application of DOAS to scattered sunlight limb radiances is described in detail below.…”

High Repetition Rate Mid-Infrared Differential Absorption Lidar for Atmospheric Pollution Detection

“…It is widely used in multiple fields including atmospheric, agricultural and industrial gas detection. At present, great progress has been made in the visible and ultraviolet spectral regions DIALs, which can determine and quantify the concentration of various gases in the atmosphere [4][5][6][7][8]. Ultraviolet DIAL uses Dye laser or Raman laser.…”