Automated determination of the dates of sudden stratospheric warming

Nikolai M. Gavrilov; Matvey M. Efimov

doi:10.1117/12.2603313

15 December 2021 Automated determination of the dates of sudden stratospheric warming

Nikolai M. Gavrilov, Matvey M. Efimov

Proceedings Volume 11916, 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics; 119167T (2021) https://doi.org/10.1117/12.2603313
Event: 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 2021, Moscow, Russian Federation

Abstract

For automated searches for sudden stratospheric warming (SSW) events, their beginning/ending dates are defined as extremes of the first-order time derivative simultaneous with zero values of the second-order time derivative of temperature and zonal wind. The dates of the fastest changes in temperature and zonal wind differ not more than two days for SSW searching the JRA-55 database. The SSW dates correspond, within the limits of the uncertainties, to those obtained with other standard methods. Frequently, before SSW developments, increases in the heat fluxes directed to the North Pole occur, which can heat the polar stratosphere.

Citation Download Citation

Nikolai M. Gavrilov and Matvey M. Efimov "Automated determination of the dates of sudden stratospheric warming", Proc. SPIE 11916, 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 119167T (15 December 2021); https://doi.org/10.1117/12.2603313

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