20OESS The volcanic eruption observed by the satellite microwave measurements and the MiRS retrieved temperature profiles: The Hunga Tonga-Hunga Ha’apai Volcanic Eruption case

The volcanic eruption which occurred on January 15, 2022 at Hunga Tonga-Hunga Ha’apai was the strongest since the 19^th century. Due to its unprecedented strength, its noticeable effects on the atmosphere could be expected. Satellite microwave brightness temperature observations were analyzed to study the effects of the eruption including those from the Advanced Technology Microwave Sounder (ATMS) on board the National Oceanic and Atmospheric Administration (NOAA)-20 and the Suomi-National Polar-orbiting Partnership (SNPP) satellites and from the Advanced Microwave Sounding Unit (AMSU)-A on board Meteorological operational satellites (MetOp)-B/MetOp-C. In addition, the atmospheric temperature profiles retrieved from NOAA Microwave Integrated Retrieval System (MiRS) using these microwave observations were also analyzed. The atmospheric perturbations impacted by the volcano eruption were clearly shown in the satellite microwave measured brightness temperatures and the MiRS retrieved atmospheric temperatures, and were indicative of an initial Lamb wave and trailing fast-traveling gravity waves, within the stratosphere. The presentation will discuss the analysis data sets and highlight the observed vertical and horizontal structures consistent with the aforementioned stratospheric waves.