Three-dimensional analysis reveals diverse heat wave types in Europe
In: Communications Earth & Environment, Jg. 5 (2024), Heft 1, S. 1-8
Online
academicJournal
Zugriff:
Abstract Heat waves are among the most studied atmospheric hazards but commonly investigated near-surface temperature patterns provide only limited insight into their complex structure. Here we propose and evaluate a novel approach to the analysis of heat waves as three-dimensional (3D) phenomena, employing the ERA5 reanalysis in three European regions during 1979–2022. Four types of heat waves based on their vertical cross sections of temperature anomalies are introduced: near-surface, lower-tropospheric, higher-tropospheric, and omnipresent. The individual heat wave types differ in length, predominant occurrence within summer, and soil moisture preconditioning. While near-surface heat waves may persist for more than 2 weeks, those located mainly in higher troposphere are shortest (5 days at most). This demonstrates that warm advection must be accompanied by a downward propagation of positive temperature anomalies through air subsidence and diabatic heating to maintain long-lasting heat waves. We also show that soil-moisture preconditioning is crucial for near-surface heat waves only, thus pointing to different driving mechanisms for the individual 3D heat wave types.
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Three-dimensional analysis reveals diverse heat wave types in Europe
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Autor/in / Beteiligte Person: | Lhotka, Ondřej ; Kyselý, Jan |
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Zeitschrift: | Communications Earth & Environment, Jg. 5 (2024), Heft 1, S. 1-8 |
Veröffentlichung: | Nature Portfolio, 2024 |
Medientyp: | academicJournal |
ISSN: | 2662-4435 (print) |
DOI: | 10.1038/s43247-024-01497-2 |
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