Preprints
https://doi.org/10.5194/amt-2023-267
https://doi.org/10.5194/amt-2023-267
05 Apr 2024
 | 05 Apr 2024
Status: this preprint is currently under review for the journal AMT.

Using OMPS-LP color ratio to extract stratospheric aerosol particle median radius and concentration with application to two volcanic eruptions

Yi Wang, Mark Schoeberl, and Ghassan Taha

Abstract. We derive stratospheric aerosol microphysical parameters from Ozone Mapping Profiler Suite Limb Profiler (OMPS-LP) satellite measurements using aerosol extinction coefficient ratios at two wavelengths (the color ratio), which is sensitive to the particle radius, and concentration. We estimate various sources of uncertainty in this technique including extinction coefficient measurement error, sensitivity to the size distribution width assumption, and the OMPS-LP algorithm phase function error. We apply our algorithm to extinction coefficient measurements made by the Stratospheric Aerosol and Gas Experiment on the International Space Station (SAGE III/ISS) to verify our approach and find that our results are in good agreement. Our results also compare favorably to balloon borne particle size measurements and concentrations under ambient condition and 2019 Raikoke volcanic eruption assuming a log-normal particle size distribution width of 1.6. We also estimate the changes in aerosol median radius and concentration following the 2019 Raikoke and 2022 Hunga Tonga-Hunga Ha’apai volcanic eruptions and the result is consistent with other retrievals published in the literature.

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Yi Wang, Mark Schoeberl, and Ghassan Taha

Status: open (until 16 Jul 2024)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on amt-2023-267', Larry Thomason, 30 Apr 2024 reply
    • CC2: 'Reply on CC1', Travis N. Knepp, 01 May 2024 reply
    • CC3: 'Reply on CC1', Mark Schoeberl, 04 May 2024 reply
      • CC4: 'Reply on CC3', Larry Thomason, 06 May 2024 reply
  • CC5: 'Comment on amt-2023-267', Travis N. Knepp, 06 May 2024 reply
    • CC6: 'Reply on CC5', Yi Wang, 07 May 2024 reply
      • CC7: 'Reply on CC6', Travis N. Knepp, 07 May 2024 reply
  • CC8: 'Comment on amt-2023-267', Mahesh Kovilakam, 09 May 2024 reply
  • RC1: 'Comment on amt-2023-267', Anonymous Referee #1, 17 Jun 2024 reply
  • RC2: 'Comment on amt-2023-267', Anonymous Referee #2, 21 Jun 2024 reply
Yi Wang, Mark Schoeberl, and Ghassan Taha
Yi Wang, Mark Schoeberl, and Ghassan Taha

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Short summary
The OMPS-LP satellite instrument assesses aerosol scattering in the atmospheric limb. Using a dual-wavelength extinction coefficient algorithm, we extract stratospheric aerosol vertical profiles from OMPS-LP data. Our study addresses uncertainties and validates these profiles against in-situ balloon data and SAGE-III/ISS retrievals. Investigating the Raikoke and Hunga Tonga-Hunga Ha'apai eruptions, we analyze the evolution of aerosol size and concentration, confirming our method's reliability.