Precipitation extremes in Ukraine from 1979 to 2019: climatology, large-scale flow conditions, and moisture sources

Agayar, Ellina; Aemisegger, Franziska; Armon, Moshe; Scherrmann, Alexander; Wernli, Heini

doi:https://doi.org/10.5194/nhess-24-2441-2024

Articles | Volume 24, issue 7

https://doi.org/10.5194/nhess-24-2441-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

https://doi.org/10.5194/nhess-24-2441-2024

© Author(s) 2024. This work is distributed under
the Creative Commons Attribution 4.0 License.

Articles | Volume 24, issue 7

Research article

|

18 Jul 2024

Research article |

| 18 Jul 2024

Precipitation extremes in Ukraine from 1979 to 2019: climatology, large-scale flow conditions, and moisture sources

Ellina Agayar, Franziska Aemisegger, Moshe Armon, Alexander Scherrmann, and Heini Wernli

Supplement

https://doi.org/10.5194/nhess-24-2441-2024-supplement

Data sets

ERA5 hourly data on pressure levels from 1940 to present H. Hersbach, et al. https://doi.org/10.24381/cds.bd0915c6

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Short summary

This study presents the results of a climatological investigation of extreme precipitation events (EPEs) in Ukraine for the period 1979–2019. During all seasons EPEs are associated with pronounced upper-level potential vorticity (PV) anomalies. In addition, we find distinct seasonal and regional differences in moisture sources. Several extreme precipitation cases demonstrate the importance of these processes, complemented by a detailed synoptic analysis.