EGU21-5223
https://doi.org/10.5194/egusphere-egu21-5223
EGU General Assembly 2021
© Author(s) 2021. This work is distributed under
the Creative Commons Attribution 4.0 License.

Stratospheric aerosol enhancement and decay after Raikoke eruption in July 2019 as observed from Tbilisi, Georgia and Halle, Belgium using ground-based twilight sky brightness spectral measurements.

Nina Mateshvili1, Didier Fussen1, Iuri Mateshvili2, Filip Vanhellemont1, Christine Bingen1, Tamar Paatashvili2, Erkki Kyrölä3, Charles Robert1, and Emmanuel Dekemper1
Nina Mateshvili et al.
  • 1Royal Belgian Institute for Space Aeronomy, Brussels, Belgium (ninam@aeronomie.be)
  • 2E.Kharadze Georgian National Astrophysical Observatory, Georgia
  • 3Finnish Meteorological Institute, Helsinki, Finland

Twilight sky brightness spectral measurements are an inexpensive and effective way to observe enhancements of stratospheric aerosols. In this work, we present our observations of the volcanic cloud produced by the eruption of Raikoke volcano (Kuril Islands, 48°N, 153°E) above two distinct sites in South Caucasus and Western Europe, respectively: Tbilisi, Georgia (41° 43’ N, 44° 47° E) and Halle, Belgium (50° 44′ N, 4° 14′ E).

We present our dataset, which describes the evolution of the stratospheric aerosol in the period July 2019-December 2020. Stratospheric aerosol vertical extinction profiles were retrieved at 780 nm from spectral measurements of twilight sky brightness above both sites.

The first aerosols originating from Raikoke  were observed in the beginning of July above Halle and in August above Georgia. The layer maximum was mostly observed at 17 km above Georgia and at 10-17 km above Belgium until April-May 2020. Later, the volcanic cloud was observed sporadically until the end of 2020.

How to cite: Mateshvili, N., Fussen, D., Mateshvili, I., Vanhellemont, F., Bingen, C., Paatashvili, T., Kyrölä, E., Robert, C., and Dekemper, E.: Stratospheric aerosol enhancement and decay after Raikoke eruption in July 2019 as observed from Tbilisi, Georgia and Halle, Belgium using ground-based twilight sky brightness spectral measurements., EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-5223, https://doi.org/10.5194/egusphere-egu21-5223, 2021.

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