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- W4229692541 abstract "<strong class=journal-contentHeaderColor>Abstract.</strong> Events of very high concentrations of <span class=inline-formula><sup>7</sup></span>Be cosmogenic radionuclide have been recorded at low-elevation surface stations in the subpolar regions of Europe during the cold season. With an aim to investigate the mechanisms responsible for those peak <span class=inline-formula><sup>7</sup></span>Be events, and in particular to verify if they are associated with the fast descent of stratospheric air masses occurring during sudden stratospheric warming (SSW) events, we analyze <span class=inline-formula><sup>7</sup></span>Be observations at six sampling sites in Fennoscandia during JanuaryâMarch 2003 when very high <span class=inline-formula><sup>7</sup></span>Be concentrations were observed and the Arctic vortex was relatively unstable as a consequence of several SSW events. We use the GEOS-Chem chemistry and transport model driven by the MERRA-2 meteorological reanalysis to simulate tropospheric <span class=inline-formula><sup>7</sup></span>Be over northern Europe. We show that the model reasonably reproduces the temporal evolution of surface <span class=inline-formula><sup>7</sup></span>Be concentrations observed at the six sampling sites. Our analysis of model simulations, surface <span class=inline-formula><sup>7</sup></span>Be observations, atmospheric soundings of ozone and temperature and surface ozone measurements indicates that the <span class=inline-formula><sup>7</sup></span>Be peak observed in late February 2003 (between 20 and 28 February 2003) at the six sampling sites in Fennoscandia was associated with downward transport of stratospheric vortex air that originated during an SSW that occurred a few days earlier (between 18 and 21 February 2003)." @default.
- W4229692541 created "2022-05-11" @default.
- W4229692541 creator A5068255176 @default.
- W4229692541 date "2021-06-10" @default.
- W4229692541 modified "2023-10-18" @default.
- W4229692541 title "Reply on RC1" @default.
- W4229692541 doi "https://doi.org/10.5194/acp-2020-1121-ac1" @default.
- W4229692541 hasPublicationYear "2021" @default.
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