Original paper
Heavy Vb‑cyclone precipitation: a transfer entropy application showcase
Krug, Amelie; Pothapakula, Praveen Kumar; Primo, Cristina; Ahrens, Bodo
Meteorologische Zeitschrift Vol. 30 No. 3 (2021), p. 279 - 284
46 references
published: Jul 8, 2021
published online: Apr 12, 2021
manuscript accepted: Mar 1, 2021
manuscript revision received: Feb 27, 2021
manuscript revision requested: Feb 22, 2021
manuscript received: Dec 30, 2020
Open Access (paper may be downloaded free of charge)
Abstract
Several past summer floods in Central Europe were associated with so-called Vb‑cyclones propagating from the Mediterranean Sea north-eastward to Central Europe. This study illustrates the usefulness of the parametric transfer entropy measure TE‑linear in investigating heavy Vb‑cyclone precipitation events in the Odra catchment (Poland). With the application of the TE‑linear approach, we confirm the impact of the Mediterranean Sea on precipitation intensification. Moreover, we also detect significant information exchange to Vb‑cyclone precipitation from evaporation over the European continent along the typical Vb‑cyclone pathway. Thus, the Mediterranean Sea could enhance the Vb‑cyclone precipitation by pre-moistening continental moisture source regions that contribute to precipitation downstream in the investigated catchments. Overall, the transfer entropy approach with the measure TE‑linear proved to be computationally effective and complementary to traditional methods such as Lagrangian and Eulerian diagnostics.
Keywords
Vb‑cyclones • heavy precipitation events • transfer entropy • Odra • Poland • twentieth century reanalysis