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Identifying gravity waves launched by the Hunga Tonga-Hunga Ha′apai volcanic eruption in mesosphere/lower-Thermosphere winds derived from CONDOR and the Nordic Meteor Radar Cluster

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posted on 2023-09-21, 07:56 authored by G Stober, A Liu, A Kozlovsky, Z Qiao, W Krochin, G Shi, J Kero, M Tsutsumi, N Gulbrandsen, S Nozawa, M Lester, K Baumgarten, E Belova, N Mitchell
The Hunga Tonga-Hunga Ha′apai volcano eruption was a unique event that caused many atmospheric phenomena around the globe. In this study, we investigate the atmospheric gravity waves in the mesosphere/lower-Thermosphere (MLT) launched by the volcanic explosion in the Pacific, leveraging multistatic meteor radar observations from the Chilean Observation Network De Meteor Radars (CONDOR) and the Nordic Meteor Radar Cluster in Fennoscandia. MLT winds are computed using a recently developed 3DVAR+DIV algorithm. We found eastward-and westward-Traveling gravity waves in the CONDOR zonal and meridional wind measurements, which arrived 12 and 48ĝ€¯h after the eruption, and we found one in the Nordic Meteor Radar Cluster that arrived 27.5ĝ€¯h after the volcanic detonation. We obtained observed phase speeds for the eastward great circle path at both locations of about 250ĝ€¯mĝ€¯s-1, and they were 170-150ĝ€¯mĝ€¯s-1 for the opposite propagation direction. The intrinsic phase speed was estimated to be 200-212ĝ€¯mĝ€¯s-1. Furthermore, we identified a potential lamb wave signature in the MLT winds using 5ĝ€¯min resolved 3DVAR+DIV retrievals.

Funding

200021-200517/1

MRI: Acquisition of A Meteor Radar for the Andes Lidar Observatory

Directorate for Geosciences

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A Consolidated Grant Proposal for Solar and Planetary Science at the University of Leicester, 2022 - 2025

Science and Technology Facilities Council

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Coupling between upper and middle atmosphere in the polar region using a multi-beam LIDAR and multiple instruments

Japan Society for the Promotion of Science

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History

Citation

Stober, G., Liu, A., Kozlovsky, A., Qiao, Z., Krochin, W., Shi, G., Kero, J., Tsutsumi, M., Gulbrandsen, N., Nozawa, S., Lester, M., Baumgarten, K., Belova, E., and Mitchell, N.: Identifying gravity waves launched by the Hunga Tonga–Hunga Ha′apai volcanic eruption in mesosphere/lower-thermosphere winds derived from CONDOR and the Nordic Meteor Radar Cluster, Ann. Geophys., 41, 197–208, https://doi.org/10.5194/angeo-41-197-2023, 2023.

Author affiliation

Department of Physics & Astronomy, University of Leicester

Version

  • VoR (Version of Record)

Published in

Annales Geophysicae

Volume

41

Issue

1

Pagination

197 - 208

Publisher

Copernicus GmbH

issn

0992-7689

eissn

1432-0576

Acceptance date

2023-03-07

Copyright date

2023

Available date

2023-09-21

Language

en

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