Preprints
https://doi.org/10.5194/acp-2021-156
https://doi.org/10.5194/acp-2021-156

  23 Mar 2021

23 Mar 2021

Review status: this preprint is currently under review for the journal ACP.

Geometric estimation of volcanic eruption column height from GOES-R near-limb imagery – Part 2: Case studies

Ákos Horváth1, Olga A. Girina2, James L. Carr3, Dong L. Wu4, Alexey A. Bril5, Alexey A. Mazurov5, Dmitry V. Melnikov2, Gholam Ali Hoshyaripour6, and Stefan A. Buehler1 Ákos Horváth et al.
  • 1Meteorological Institute, Universität Hamburg, Hamburg, Germany
  • 2Institute of Volcanology and Seismology, Far East Branch of the Russian Academy of Sciences (IVS FEB RAS), Petropavlovsk-Kamchatsky, Russia
  • 3Carr Astronautics, Greenbelt, MD, USA
  • 4NASA Goddard Space Flight Center, Greenbelt, MD, USA
  • 5Space Research Institute of the Russian Academy of Sciences (SRI RAS), Moscow, Russia
  • 6Institute of Meteorology and Climate Research, Karlsruhe Institute of Technology (KIT), Karlsruhe, Germany

Abstract. In a companion paper (Horváth et al., 2021), we introduced a new technique to estimate volcanic eruption column height from extremely oblique near-limb geostationary views. The current paper demonstrates and validates the technique in a number of recent eruptions, ranging from ones with weak columnar plumes to subplinian events with massive umbrella clouds and overshooting tops that penetrate the stratosphere. Due to its purely geometric nature, the new method is shown to be unaffected by the limitations of the traditional brightness temperature method, such as height underestimation in subpixel and semitransparent plumes, ambiguous solutions near the tropopause temperature inversion, or the lack of solutions in undercooled plumes. The side view height estimates were in good agreement with plume heights derived from ground-based video and satellite stereo observations, suggesting they can be a useful complementary to established techniques.

Ákos Horváth et al.

Status: open (until 23 Jun 2021)

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  • RC1: 'Comment on acp-2021-156', Anonymous Referee #1, 07 Jun 2021 reply

Ákos Horváth et al.

Ákos Horváth et al.

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Short summary
We demonstrate the side view plume height estimation technique described in Part 1 on seven volcanic eruptions from 2019 and 2020, including the 2019 Raikoke eruption. We explore the strengths and limitations of the new technique in comparison to height estimation from brightness temperatures, stereo observations, and ground-based video footage.
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