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  • Barrow_Utqiagvik; Barrow, Alaska, USA; International Polar Year (2007-2008); IPY; MULT; Multiple investigations; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; SPP1158  (1)
  • atmospheric spectroscopy  (1)
  • infrared  (1)
  • 1
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    Aircraft and satellite derived arctic BrO profiles of the tropospheric column (2012)
    PANGAEA
    In:  Supplement to: Choi, Su-Jin; Wang, Yujie; Salawitch, Ross J; Canty, T; Joiner, J; Zeng, T; Kurosu, T P; Chance, K; Richter, Astrid; Huey, L G; Liao, Jingjuan; Neuman, J A; Nowak, J B; Dibb, J E; Weinheimer, A J; Diskin, G S; Ryerson, T B; da Silva, A; Curry, J; Kinnison, D; Tilmes, S; Levelt, P F (2012): Analysis of satellite-derived Arctic tropospheric BrO columns in conjunction with aircraft measurements during ARCTAS and ARCPAC. Atmospheric Chemistry and Physics, 12(3), 1255-1285, https://doi.org/10.5194/acp-12-1255-2012
    Details
    Publication Date: 2023-12-13
    Description: We derive tropospheric column BrO during the ARCTAS and ARCPAC field campaigns in spring 2008 using retrievals of total column BrO from the satellite UV nadir sensors OMI and GOME-2 using a radiative transfer model and stratospheric column BrO from a photochemical simulation. We conduct a comprehensive comparison of satellite-derived tropospheric BrO column to aircraft in-situ observations of BrO and related species. The aircraft profiles reveal that tropospheric BrO, when present during April 2008, was distributed over a broad range of altitudes rather than being confined to the planetary boundary layer (PBL). Perturbations to the total column resulting from tropospheric BrO are the same magnitude as perturbations due to longitudinal variations in the stratospheric component, so proper accounting of the stratospheric signal is essential for accurate determination of satellite-derived tropospheric BrO. We find reasonably good agreement between satellite-derived tropospheric BrO and columns found using aircraft in-situ BrO profiles, particularly when satellite radiances were obtained over bright surfaces (albedo 〉0.7), for solar zenith angle 〈80° and clear sky conditions. The rapid activation of BrO due to surface processes (the bromine explosion) is apparent in both the OMI and GOME-2 based tropospheric columns. The wide orbital swath of OMI allows examination of the evolution of tropospheric BrO on about hourly time intervals near the pole. Low surface pressure, strong wind, and high PBL height are associated with an observed BrO activation event, supporting the notion of bromine activation by high winds over snow.
    Keywords: Barrow_Utqiagvik; Barrow, Alaska, USA; International Polar Year (2007-2008); IPY; MULT; Multiple investigations; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas; SPP1158
    Type: Dataset
    Format: application/zip, 4 datasets
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 2
    Electronic Resource
    Electronic Resource
    Intercomparison of measurements of stratospheric hydrogen fluoride (1990)
    Springer
    Journal of atmospheric chemistry 10 (1990), S. 219-236 
    Details
    ISSN: 1573-0662
    Keywords: Hydrogen fluoride ; HF ; stratosphere ; intercomparisons ; infrared
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract Observations of the vertical profile of hydrogen fluoride (HF) vapor in the stratosphere and of the vertical column amounts of HF above certain altitudes were made using a variety of spectroscopic instruments in the 1982 and 1983 Balloon Intercomparison Campaigns. Both emission instruments working in the far infrared spectral region and absorption instruments using solar occultation in the 2.5μm region were employed. No systematic differences were seen in results from the two spectral regions. A mean profile from 20–45 km is presented, with uncertainties ranging from 20% to 50%. Total columns measured from ground and from 12 km are consistent with the profile if the mixing ratio for HF is small in the tropophere and low stratosphere.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00054857
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    Balloon Intercomparison Campaigns: Results of remote sensing measurements of HCl (1990)
    Springer
    Journal of atmospheric chemistry 10 (1990), S. 237-272 
    Details
    ISSN: 1573-0662
    Keywords: stratospheric composition ; HCl ; remote sensing ; atmospheric spectroscopy
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Geosciences
    Notes: Abstract All of the techniques used to measure stratospheric HCl during the two BIC campaigns involved high resolution infrared spectroscopy. The balloon-borne instruments included five different spectrometers, three operating in the solar absorption mode and two in emission (at distinctly different wavelengths). Ground-based and aircraft correlative measurements were made close to the balloon locations, again by near-infrared spectroscopy. Within this set of results, comparisons between different techniques (absorption vs emission) viewing the same airmass (i.e., on the same gondola) were possible, as were comparisons between the same technique used on different gondolas spaced closely in time and location. The final results yield a mean profile of concentration of HC1 between 18 and 40 km altitude; an envelope of ±15% centered on this profile encompasses all of the results within one standard deviation of their individual mean values. The absolute accuracy of the final profile is estimated to be no worse than 10%. It is concluded also that the measurement techniques for HCl have reached a level of performance where a precision of 10% to 15% can be confidently expected.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00054858
    Location Call Number Limitation Availability
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    Paper (German National Licenses)
    Fulltext
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