New measurements of OClO absorption cross-sections in the 325–435 nm region and their temperature dependence between 213 and 293 K

Kromminga, H; Orphal, J.; Spietz, Peter; Voigt, S.; Burrows, J. P.

doi:10.1016/s1010-6030(03)00071-6

Cited by 63 publications

(75 citation statements)

References 26 publications

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“…The spectroscopic analysis of the measured skylight spectra for the detection of O 3 , NO 2 , BrO, and OClO was based on differential optical absorption spectroscopy (DOAS) (for a recent overview see Platt and Stutz, 2008), and assisting radiative transfer (RT) calculations allowed the estimation of the integrated overhead (or total) column density of the targeted gases (Solomon et al, 1987b). McElroy et al (1999) were the first to exploit airborne nadir-scattered skylight measurements to study plumes of BrO in the lower troposphere during Arctic spring. Later airborne multi-axis DOAS measurements by Bruns et al (2004Bruns et al ( , 2006) over Europe and on major air traffic corridors by Dix et al (2009) within the CARIBIC project (http: //www.caribic-atmospheric.com/) were used to gain information on the distribution and photochemistry of pollutants and their products within the troposphere (e.g.…”

Section: Introductionmentioning

confidence: 99%

The novel HALO mini-DOAS instrument: inferring trace gas concentrations from airborne UV/visible limb spectroscopy under all skies using the scaling method

et al. 2017

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Abstract. We report on a novel six-channel optical spectrometer (further on called mini-DOAS instrument) for airborne nadir and limb measurements of atmospheric trace gases, liquid and solid water, and spectral radiances in the UV/vis and NIR spectral ranges. The spectrometer was developed for measurements from aboard the German High-Altitude and Long-Range (HALO) research aircraft during dedicated research missions. Here we report on the relevant instrumental details and the novel scaling method used to infer the mixing ratios of UV/vis absorbing trace gases from their absorption measured in limb geometry. The uncertainties of the scaling method are assessed in more detail than before for sample measurements of NO 2 and BrO. Some first results are reported along with complementary measurements and comparisons with model predictions for a selected HALO research flight from Cape Town to Antarctica, which was performed during the research mission ESMVal on 13 September 2012.

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Section: Introductionmentioning

confidence: 99%

The novel HALO mini-DOAS instrument: inferring trace gas concentrations from airborne UV/visible limb spectroscopy under all skies using the scaling method

et al. 2017

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“…Eisinger and Burrows, 1998;Khokar et al, 2005;Krotkov et al, 2006;Lee et al, 2008;Krueger et al, 1995Krueger et al, , 2008 Developed since the mid-seventies (Noxon, 1975;Perner et al, 1976;Platt et al, 1979), today DOAS is a well established spectroscopic method to determine trace gases in the atmosphere, among others also SO 2 . DOAS is typically applied in the UV-visible wavelength region and uses the narrow band absorption features of molecules for their identification; a detailed description can e.g.…”

Section: Introductionmentioning

confidence: 99%

Novel SO<sub>2</sub> spectral evaluation scheme using the 360–390 nm wavelength range

et al. 2010

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Abstract. Differential Optical Absorption Spectroscopy (DOAS) is a well established spectroscopic method to determine trace gases in the atmosphere. During the last decade, passive DOAS, which uses solar radiation scattered in the atmosphere as a light source, has become a standard tool to determine SO 2 column densities and emission fluxes from volcanoes and other large sources by ground based as well as satellite measurements. For the determination of SO 2 column densities, the structured absorption of the molecule in the 300-330 nm region (due to the A 1 B 1 ← X 1 A 1 transition) is used. However, there are several problems limiting the accuracy of the technique in this particular application. Here we propose to use an alternative wavelength region (360-390 nm) due to the spin-forbidden a 3 B 2 ← X 1 A 1 transition for the DOAS evaluation of SO 2 in conditions where high SO 2 column densities prevail. We show this range to have considerable advantages in such cases, in particular when the particle content of the plume is high and when measurements are performed at large distances from the area of interest.

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“…The DOAS fits of the measurements presented here are performed applying the cross sections by Kromminga et al (2003) at 213 K. Kromminga et al (2003) report band peaks about 8% smaller than leading to a constant offset in the slant column densities for OClO when applied in the modelling.…”

Section: Further Tests Of the Modelled Oclo Sensitivitymentioning

confidence: 97%

“…Solomon et al, 1987b). The fitting procedure, in a window from 365 to 389 nm, includes in addition to the OClO cross section (Kromminga et al, 2003) and a polynomial for the compensation of broad-band features, the nitrogen dioxide NO 2 (Vandaele et al, 2003), and the oxygen dimer O 4 (Hermans et al, 1999) absorption cross sections as well as a rotational Raman scattering cross section (Vountas et al, 1998). A solar irradiance measurement is chosen as the background spectrum.…”

Section: Sciamachymentioning

confidence: 99%

Evaluation of stratospheric chlorine chemistry for the Arctic spring 2005 using modelled and measured OClO column densities

et al. 2011

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Abstract. Chlorine dioxide, OClO, column amounts retrieved from measurements of the SCIAMACHY satellite instrument are presented and validated by comparison with simultaneous ground-based DOAS observations. In addition, the measurements are compared to model calculations taking into account the photochemical change along the light path.Although OClO does not participate directly in the destruction of ozone, its accurate measurement as well as modelling is crucial to understand the highly perturbed chlorine chemistry in the polar vortices. SCIAMACHY OClO slant columns retrieved during spring 2005 have been quantitatively validated by comparison with slant columns retrieved from measurements made in Ny-Ålesund (79 • N, 12 • E) and Summit (73 • N, 38 • W) as well qualitatively for Bremen (53 • N, 9 • E). Fair to good agreement is found depending on location as well as time of year.OClO slant column densities modelled with a set of stacked box models and considering the light path through the atmosphere are also included in this comparison. The model predictions differ significantly from the measured quantities. OClO amounts are underestimated for conditions of strong chlorine activation and at large solar zenith angles. Sensitivity studies for several parameters in the stacked box model have been performed and it is inferred that using the chemistry known to date, the observed OClO cannot be adequately reproduced within the range of uncertainties given for the various model parameters.

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New measurements of OClO absorption cross-sections in the 325–435 nm region and their temperature dependence between 213 and 293 K

Cited by 63 publications

References 26 publications

The novel HALO mini-DOAS instrument: inferring trace gas concentrations from airborne UV/visible limb spectroscopy under all skies using the scaling method

The novel HALO mini-DOAS instrument: inferring trace gas concentrations from airborne UV/visible limb spectroscopy under all skies using the scaling method

Novel SO<sub>2</sub> spectral evaluation scheme using the 360–390 nm wavelength range

Evaluation of stratospheric chlorine chemistry for the Arctic spring 2005 using modelled and measured OClO column densities

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New measurements of OClO absorption cross-sections in the 325–435 nm region and their temperature dependence between 213 and 293 K

Cited by 63 publications

References 26 publications

The novel HALO mini-DOAS instrument: inferring trace gas concentrations from airborne UV/visible limb spectroscopy under all skies using the scaling method

The novel HALO mini-DOAS instrument: inferring trace gas concentrations from airborne UV/visible limb spectroscopy under all skies using the scaling method

Novel SO&lt;sub&gt;2&lt;/sub&gt; spectral evaluation scheme using the 360–390 nm wavelength range

Evaluation of stratospheric chlorine chemistry for the Arctic spring 2005 using modelled and measured OClO column densities

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Novel SO<sub>2</sub> spectral evaluation scheme using the 360–390 nm wavelength range