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  Aerosol characterization within the fresh and aged stratospheric plume from the Hunga Tonga eruption 15 January 2022

Kloss, C., Renard, J.-B., Baron, A., Knepp, T., Berthet, G., Legras, B., Sellitto, P., Carboni, E., Siddans, R., Bègue, N., Jégou, F., Venkataraman, S., Piketh, S., Duflot, V., Payen, G. (2023): Aerosol characterization within the fresh and aged stratospheric plume from the Hunga Tonga eruption 15 January 2022, XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG) (Berlin 2023).
https://doi.org/10.57757/IUGG23-0464

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Datensatz-Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5015953 Versions-Permalink: https://gfzpublic.gfz-potsdam.de/pubman/item/item_5015953_2
Genre: Konferenzbeitrag

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 Urheber:
Kloss, Corinna1, Autor
Renard, Jean-Baptiste1, Autor
Baron, Alexandre1, Autor
Knepp, Travis1, Autor
Berthet, Gwenaël1, Autor
Legras, Bernard1, Autor
Sellitto, Pasquale1, Autor
Carboni, Elisa1, Autor
Siddans, Richard1, Autor
Bègue, Nelson1, Autor
Jégou, Fabrice1, Autor
Venkataraman, Sivakumar1, Autor
Piketh, Stuart1, Autor
Duflot, Valentin1, Autor
Payen, Guillaume1, Autor
Affiliations:
1IUGG 2023, General Assemblies, 1 General, International Union of Geodesy and Geophysics (IUGG), External Organizations, ou_5011304              

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Schlagwörter: -
 Zusammenfassung: The Hunga Tonga eruption on January 14th and 15th 2022 injected water, a variety of gases and aerosols into the Upper Troposphere and Lower Stratosphere up to altitude of ~50 km. Space-borne observations show that the eruption had the strongest impact on the stratospheric Aerosol Optical Depth since the Pinatubo eruption in 1991. We performed two measurement campaigns using weather balloons with the Light Optical Aerosol Counter (LOAC, version 1.5) within the fresh (~1 week post eruption, on Reunion island 21°S) and aged (~8 months post eruption, in South Africa 24°S) stratospheric Hunga Tonga plume. Within this talk, I will present aerosol size distribution and typology information based on LOAC in situ measurements, in the context of collocated ground-based aerosol lidar profiles recorded at OPAR (Observatoire de Physique de l'Atmosphère à La Réunion) and global space-borne observations. Plume peak altitudes have decreased by 2-3 km between the two in situ measurement campaigns. LOAC observations point to exclusively small aerosol particles (<1 µm in diameter) within the fresh stratospheric plume (22-23 km altitude) and a significant increase in particle size for the aged, descended plume (~20 km altitude). This points to freshly nucleated aerosol particles within the fresh plume and growing particles (e.g. coagulation processes) within the aged plume. While satellite observations only identify sulfate particles, LOAC typology information show indications of a small absorbing component for particles < 0.5 µm, which potentially points to small fractured sulfur coated ash particles.

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Sprache(n): eng - Englisch
 Datum: 2023
 Publikationsstatus: Final veröffentlicht
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.57757/IUGG23-0464
 Art des Abschluß: -

Veranstaltung

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Titel: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Veranstaltungsort: Berlin
Start-/Enddatum: 2023-07-11 - 2023-07-20

Entscheidung

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Quelle 1

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Titel: XXVIII General Assembly of the International Union of Geodesy and Geophysics (IUGG)
Genre der Quelle: Konferenzband
 Urheber:
Affiliations:
Ort, Verlag, Ausgabe: Potsdam : GFZ German Research Centre for Geosciences
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