This title appears in the Scientific Report :
2023
Aerosol characterization within the fresh and aged stratospheric plume from the Hunga Tonga eruption 15 January 2022
Aerosol characterization within the fresh and aged stratospheric plume from the Hunga Tonga eruption 15 January 2022
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...
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Personal Name(s): | Kloss, Corinna (Corresponding author) |
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Renard, Jean-Baptiste / Baron, Alexandre / Knepp, Travis / Berthet, Gwenaël / Legras, Bernard / Sellitto, Pasquale / Carboni, Elisa / Siddans, Richard / Bègue, Nelson / Jégou, Fabrice / Venkataraman, Sivakumar / Piketh, Stuart / Duflot, Valentin / Payen, Guillaume | |
Contributing Institute: |
Stratosphäre; IEK-7 |
Imprint: |
2023
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Conference: | International Union of Geodesy and Geophysics, Berlin (Fed Rep Germany), 2023-07-11 - 2023-07-20 |
Document Type: |
Conference Presentation |
Research Program: |
Climate Feedbacks |
Publikationsportal JuSER |
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. |