Gravity wave signatures in mesospheric/lower thermospheric winds caused by Hunga Tonga-Hunga Ha‘apai volcanic eruption identified by CONDOR and the Nordic Meteor Radar Cluster
- 1University Bern, Institute of Applied Physics & Oeschger Center for Climate Change Research, Microwave Physics, Bern, Switzerland (gunter.stober@unibe.ch)
- 2Sodankylä Geophysical Observatory, University of Oulu, Finland
- 3Center for Space and Atmospheric Research and Department of Physical Sciences, Embry-Riddle Aeronautical University, Daytona Beach, Florida, USA
- 4National Institute of Polar Research, Tachikawa, Japan
- 5The Graduate University for Advanced Studies (SOKENDAI), Tokyo, Japan
- 6Tromsø Geophysical Observatory UiT - The Arctic University of Norway, Tromsø, Norway
- 7Institute for Space-Earth Environmental Research, Nagoya University, Japan
- 8University of Leicester, Leicester, UK
- 9Swedish Institute of Space Physics (IRF), Kiruna, Sweden
- 10British Antarctic Survey, UK
- 11University of Bath, Bath, UK
Gravity waves are a major source of the middle atmospheric short-term variability. The Hunga Tonga-Hunga Ha‘apai volcanic eruption provided a unique opportunity to study gravity wave propagation around the globe from a well-defined source. The eruption triggered several atmospheric signatures including a lamb wave (troposphere/stratosphere/mesosphere) and a package of gravity waves. Here we present results of gravity wave signatures found in mesospheric winds leveraging multi-static meteor radar networks such as the Nordic Meteor Radar Cluster and CONDOR. We were able to identify the eastward and westward propagating gravity waves. Furthermore, it was possible to estimate the intrinsic wave properties such as a horizontal wavelength of approximately 1600-2000 km and an intrinsic phase speed of 200 m/s.
How to cite: Stober, G., Liu, A., Kozlovsky, A., Qiao, Z., Tsutsumi, M., Gulbrandsen, N., Nozawa, S., Lester, M., Belova, E., Kero, J., and Mitchell, N.: Gravity wave signatures in mesospheric/lower thermospheric winds caused by Hunga Tonga-Hunga Ha‘apai volcanic eruption identified by CONDOR and the Nordic Meteor Radar Cluster , EGU General Assembly 2023, Vienna, Austria, 24–28 Apr 2023, EGU23-12882, https://doi.org/10.5194/egusphere-egu23-12882, 2023.
