Spatial and temporal variability of convective instability in the south of Western Siberia, determined on the basis of the total totals index (ERA5 reanalysis)

Konstantin N. Pustovalov; Valentina P. Gorbatenko; Olga E. Nechepurenko; Petr M. Nagorskiy; Maria V. Oglezneva

doi:10.1117/12.2603446

15 December 2021 Spatial and temporal variability of convective instability in the south of Western Siberia, determined on the basis of the total totals index (ERA5 reanalysis)

Konstantin N. Pustovalov, Valentina P. Gorbatenko, Olga E. Nechepurenko, Petr M. Nagorskiy, Maria V. Oglezneva

Author Affiliations +

Proceedings Volume 11916, 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics; 119166P (2021) https://doi.org/10.1117/12.2603446
Event: 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 2021, Moscow, Russian Federation

Abstract

The spatial and temporal variability of convective instability in the south of Western Siberia during the summer months of 1990–2019 was analyzed using Total Totals index values computed from ERA5 (ECMWF) data. For a 30-year period and specific decades, the spatial variability of the mean Total Totals values calculated for high atmospheric instability (by values above the 75th percentile) has been estimated. Centers with maximum values of the Total Totals index were localized for the 6, 9, and 12 UTC that approximately correspond to the beginning, maximum, and end of active convection under intra-mass conditions. The intra-decadal variability of the atmospheric convective potential was evaluated based on the Total Totals index over Western Siberia. Under changing climate conditions, the areas with the greatest changes in convective potential were identified.

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Konstantin N. Pustovalov, Valentina P. Gorbatenko, Olga E. Nechepurenko, Petr M. Nagorskiy, and Maria V. Oglezneva "Spatial and temporal variability of convective instability in the south of Western Siberia, determined on the basis of the total totals index (ERA5 reanalysis)", Proc. SPIE 11916, 27th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics, 119166P (15 December 2021); https://doi.org/10.1117/12.2603446

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