22 Feb 2023
 | 22 Feb 2023
Status: this preprint is currently under review for the journal AMT.

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

Yi Wang, Mark Schoeberl, Ghassan Taha, Daniel Zawada, and Adam Bourassa

Abstract. We develop an algorithm that uses the aerosol extinction at two wavelengths (color ratio) to derive the size and number density for stratospheric aerosols. We apply our algorithm to Ozone Mapping Profiler Suite Limb Profiler (OMPS-LP) L2 and Stratospheric Aerosol and Gas Experiment (SAGE) data. We show that the color ratio between two wavelengths (e.g. 510 nm/869 nm) is insensitive to aerosol concentration and thus can be used to derive aerosol size assuming a log-normal size distribution. With the size and the extinction, we can compute a number density consistent with both wavelengths. Our results compare favorably to balloon borne particle size and concentration measurements. Our results are also consistent with SAGE solar occultation measurements. Finally, we show the background distribution of stratospheric aerosols and the changes in those distributions during the Reikoke and Hunga Tonga-Hunga Ha’apai volcanic eruptions. We also show the evolution of the size and number density of aerosols following both of those eruptions.

Yi Wang et al.

Status: open (until 22 Apr 2023)

Comment types: AC – author | RC – referee | CC – community | EC – editor | CEC – chief editor | : Report abuse
  • CC1: 'Comment on amt-2023-36', Pasquale Sellitto, 25 Feb 2023 reply
  • CC2: 'Comment on amt-2023-36', Travis N. Knepp, 06 Mar 2023 reply
  • CC3: 'Comment on amt-2023-36', Peter F. Bernath, 18 Mar 2023 reply

Yi Wang et al.

Yi Wang et al.


Total article views: 386 (including HTML, PDF, and XML)
HTML PDF XML Total BibTeX EndNote
284 90 12 386 3 3
  • HTML: 284
  • PDF: 90
  • XML: 12
  • Total: 386
  • BibTeX: 3
  • EndNote: 3
Views and downloads (calculated since 22 Feb 2023)
Cumulative views and downloads (calculated since 22 Feb 2023)

Viewed (geographical distribution)

Total article views: 389 (including HTML, PDF, and XML) Thereof 389 with geography defined and 0 with unknown origin.
Country # Views %
  • 1
Latest update: 24 Mar 2023
Short summary
The OMPS-LP satellite instrument measures aerosol scattering properties across the atmospheric limb. Adopting an algorithm that uses extinction at two wavelengths, we retrieve vertical profiles of particle size and concentration. We demonstrate that these profiles are consistent with in-situ balloon and SAGE-III/ISS satellite measurements. We also show how aerosol size and concentration evolve during Reikoke and Hunga Tonga-Hunga Ha'apai eruptions.