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Geometric estimation of volcanic eruption column height from GOES-R near-limb imagery-Part 1: Methodology

Horváth, Ákos; Carr, James L.; Girina, Olga A.; Wu, Dong L.; Bril, Alexey A.; Mazurov, Alexey A.; Melnikov, Dmitry V.; Hoshyaripour, Gholam Ali ORCID iD icon 1; Buehler, Stefan A.
1 Institut für Meteorologie und Klimaforschung (IMK), Karlsruher Institut für Technologie (KIT)

Abstract:

A geometric technique is introduced to estimate the height of volcanic eruption columns using the generally discarded near-limb portion of geostationary imagery. Such oblique observations facilitate a height-by-angle estimation method by offering close-to-orthogonal side views of eruption columns protruding from the Earth ellipsoid. Coverage is restricted to daytime point estimates in the immediate vicinity of the vent, which nevertheless can provide complementary constraints on source conditions for the modeling of near-field plume evolution. The technique is best suited to strong eruption columns with minimal tilting in the radial direction. For weak eruptions with severely bent plumes or eruptions with expanded umbrella clouds the radial tilt/expansion has to be corrected for either visually or using ancillary wind profiles. Validation on a large set of mountain peaks indicates a typical height uncertainty of ±500 m for near-vertical eruption columns, which compares favorably with the accuracy of the common temperature method.


Verlagsausgabe §
DOI: 10.5445/IR/1000137081
Veröffentlicht am 25.11.2021
Originalveröffentlichung
DOI: 10.5194/acp-21-12189-2021
Scopus
Zitationen: 12
Dimensions
Zitationen: 14
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung Troposphärenforschung (IMKTRO)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1680-7316, 1680-7324
KITopen-ID: 1000137081
HGF-Programm 12.11.32 (POF IV, LK 01) Advancing atmospheric and Earth system models
Erschienen in Atmospheric Chemistry and Physics
Verlag European Geosciences Union (EGU)
Band 21
Heft 16
Seiten 12189-12206
Vorab online veröffentlicht am 16.08.2021
Nachgewiesen in Dimensions
Scopus
Web of Science
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