European Summer Synoptic Circulations and Their Observed 2022 and Projected Influence on Hot Extremes and Dry Spells
Persistent URL: http://resolver.sub.uni-goettingen.de/purl?gldocs-11858/11308
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In 2022, western Europe experienced its hottest summer on record and widespread dry conditions, with substantial impacts on health, water and vegetation. We use a reanalysis to classify daily mean sea level pressure fields and to investigate the influence of synoptic circulations on the occurrence of temperature extremes and dry days. Summer 2022 featured an above‐normal occurrence of anticyclones extending from the British Isles to the Baltic countries, as well as enhanced easterly, southerly and low‐flow conditions which contributed to the observed extremes over southern and western Europe. While the hot summer of 2022 is only partially explained by circulation anomalies, such anomalies played a key role in the exceptional occurrence of dry days. The comparison with summer circulation anomalies projected by twenty global climate models moreover suggests that future circulation changes will further exacerbate hot and dry extremes over Europe.
European summer 2022 hot extremes have been enhanced by an anomalous occurrence of distinct circulation types over different subdomains
Predominant circulation anomalies also contributed to the exceptional number of dry days, as much as local, mostly thermodynamical effects
Such anomalous circulations will become more common, thus further worsening European hot and dry extremes
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Subjects:
hot summer 2022hot extremes
circulation types
circulation classification
climate change
atmospheric circulation