17 Feb 2021
17 Feb 2021
Observation and modeling of high-7Be events in Northern Europe associated with the instability of the Arctic polar vortex in early 2003
- 1Department of Physics and Astronomy DIFA, Alma Mater Studiorum University of Bologna, via Irnerio 46, 40126 Bologna (BO), Italy
- 2National Institute of Aerospace, 100 Exploration Way, Hampton, VA 23666, USA
- 3Department of Physics, University of Cordoba, Rabanales Campus, 14071 Cordoba, Spain
- 4Finnish Meteorological Institute, P.O. Box 503, FI-00101, Helsinki, Finland
- 5Faculty of Veterinary Medicine, University of Belgrade, Bulevar oslobođenja 18, 11000 Belgrade, Serbia
- 6Institute of Meteorology, Faculty of Physics, University of Belgrade, Studentski trg 18, 11000 Belgrade, Serbia
- 7Department of Chemistry “G. Ciamician”, Alma Mater Studiorum University of Bologna, via Selmi 2, 40126 Bologna (BO), Italy
- 1Department of Physics and Astronomy DIFA, Alma Mater Studiorum University of Bologna, via Irnerio 46, 40126 Bologna (BO), Italy
- 2National Institute of Aerospace, 100 Exploration Way, Hampton, VA 23666, USA
- 3Department of Physics, University of Cordoba, Rabanales Campus, 14071 Cordoba, Spain
- 4Finnish Meteorological Institute, P.O. Box 503, FI-00101, Helsinki, Finland
- 5Faculty of Veterinary Medicine, University of Belgrade, Bulevar oslobođenja 18, 11000 Belgrade, Serbia
- 6Institute of Meteorology, Faculty of Physics, University of Belgrade, Studentski trg 18, 11000 Belgrade, Serbia
- 7Department of Chemistry “G. Ciamician”, Alma Mater Studiorum University of Bologna, via Selmi 2, 40126 Bologna (BO), Italy
Abstract. Events of very high concentrations of 7Be cosmogenic radionuclide have been recorded in the subpolar regions of Europe during the cold season. With an aim to investigate the mechanisms responsible for those peak 7Be events, and in particular to verify if they are associated with the fast descent of stratospheric air masses occurring during sudden stratospheric warming (SSWs), we analyse 7Be observations at six sampling sites in Scandinavia during January–March 2003 when very high 7Be concentrations were observed and the Arctic vortex was relatively unstable as a consequence of several SSWs. We use the GEOS-Chem chemistry and transport model driven by the MERRA-2 meteorological reanalysis to simulate tropospheric 7Be over Northern Europe. We show that the model reasonably reproduces the temporal evolution of surface 7Be concentrations observed at the six sampling sites. Our analysis of model simulations, surface 7Be observations, as well as atmospheric soundings of ozone and temperature indicates that the 7Be peak observed in late February 2003 (between 20 and 28 February 2003) at the six sampling sites in Scandinavia was associated with downward transport of stratospheric vortex air originated during SSW that occurred a few days before the peak (18–21 February 2003).
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Erika Brattich et al.
Status: open (until 14 Apr 2021)
Erika Brattich et al.
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Observation and modeling of high-7Be events in Northern Europe associated with the instability of the Arctic polar vortex in early 2003 Brattich, Erika; Liu, Hongyu; Zhang, Bo; Hernández-Ceballos, Miguel Angel; Paatero, Jussi; Sarvan, Darko; Djurdjevic, Vladimir; Tositti, Laura; Ajtić, Jelena https://doi.org/10.5281/zenodo.4117521
Erika Brattich et al.
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