Spatial-temporal variability of temperature stratification of the lower atmosphere layer during the development of abnormally early thunderstorms and squalls

Zhukova, Vera A.; Krasnenko, N. P.; Loginov, Sergei V.; Nagorskiy, Petr M.; Pustovalov, Konstantin N.; Rakov, Alexander S.

doi:10.1117/12.2575557

26th International Symposium on Atmospheric and Ocean Optics, Atmospheric Physics 2020

DOI: 10.1117/12.2575557

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Spatial-temporal variability of temperature stratification of the lower atmosphere layer during the development of abnormally early thunderstorms and squalls

Vera A. Zhukova¹,

N. P. Krasnenko²,

Sergei V. Loginov³

et al.

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2021

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The spatial and temporal variability of convective instability in the south of Western Siberia according to ERA5 reanalysis data

Pustovalov¹,

Gorbatenko²,

Nagorskii³

et al. 2021

Вестник КРАУНЦ. Физико-Математические Науки

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Представлены результаты сравнительного анализа пространственно-временной изменчивости конвективной неустойчивости на юге Западной Сибири по данным индексов неустойчивости K-Index и Total Totals, полученных из реанализа ERA5. Показано, что по значениям обоих индексов максимум конвективной неустойчивости над югом Западной Сибири приходится на Кулундинскую равнину и пойму верхнего течения р. Иртыш. Кроме того, высокие значения индексов наблюдаются над юго-востоком Урала и северо-востоком Васюганской равнины. Северная граница со значениями KIQ1 ≥ 30 ◦C и TTQ1 ≥ 50 ◦C, указывающими на вероятность образования гроз 70%, простирается до 62◦ и 61◦ с.ш. соответственно. За период 1990–2019 гг. в динамике среднегодовых значений KIQ1, в целом по территории, преобладает положительный тренд, а в динамике TTQ1 на большей части территории значимые изменения отсутствуют, однако отмечается цикличность с периодом ∼ 10 лет. A comparative analysis of the spatio-temporal variability of convective instability in the south of Western Siberia according to the K-Index and Total Totals index obtained from the ERA5 reanalysis is presented. Related to both indices, the Kulunda plain and the upper Irtysh River floodplain have the highest level of convective instability in the south of Western Siberia. In addition, high index values are observed over the southeastern Urals and the northeastern Vasyugan plain. The northern boundary extends to 62◦ and 61◦ N, respectively, with KIQ1 ≥ 30 ◦C and TTQ1 ≥ 50 ◦C, indicating a thunderstorm probability greater than 70%. The dynamics of annual average KIQ1 values for the territory as a whole are dominated by a positive trend for the period 1990–2019, and there are no significant changes in TTQ1 dynamics for most of the territory, but there is cyclicality with a period of ∼ 10 years.

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The spatial and temporal variability of convective instability in the south of Western Siberia according to ERA5 reanalysis data

Pustovalov¹,

Gorbatenko²,

Nagorskii³

et al. 2021

Вестник КРАУНЦ. Физико-Математические Науки

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Spatial-temporal variability of temperature stratification of the lower atmosphere layer during the development of abnormally early thunderstorms and squalls

Cited by 1 publication

References 2 publications

The spatial and temporal variability of convective instability in the south of Western Siberia according to ERA5 reanalysis data

The spatial and temporal variability of convective instability in the south of Western Siberia according to ERA5 reanalysis data

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