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Linking Gulf Stream air–sea interactions to the exceptional blocking episode in February 2019: a Lagrangian perspective

Wenta, Marta ORCID iD icon 1; Grams, Christian M. 1; Papritz, Lukas; Federer, Marc
1 Institut für Meteorologie und Klimaforschung Troposphärenforschung (IMKTRO), Karlsruher Institut für Technologie (KIT)

Abstract:

The development of atmospheric blocks over the North Atlantic–European region can lead to extreme weather events like heat waves or cold air outbreaks. Despite their potential severe impact on surface weather, the correct prediction of blocking lifecycles remains a key challenge in cur-
rent numerical weather prediction (NWP) models. Increasing evidence suggests that latent heat release in cyclones, the advection of cold air (cold air outbreaks, CAOs) from the Arctic over the North Atlantic, and associated air–sea interactions over the Gulf Stream are key processes contribut-
ing to the onset, maintenance, and persistence of such flow regimes. To better understand the mechanism connecting air-sea interactions over the Gulf Stream with changes in the large-scale flow, we focus on an episode between 20 and 27 February 2019, when a quasi-stationary upper-level ridge was established over western Europe accompanied by an intensified storm track in the northwestern North Atlantic. During that time, a record-breaking winter warm spell occurred over western Europe bringing temperatures above 20$^◦$C to the United Kingdom, the Netherlands, and northern France. ... mehr


Verlagsausgabe §
DOI: 10.5445/IR/1000169222
Veröffentlicht am 18.03.2024
Originalveröffentlichung
DOI: 10.5194/wcd-5-181-2024
Scopus
Zitationen: 3
Dimensions
Zitationen: 5
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Meteorologie und Klimaforschung Troposphärenforschung (IMKTRO)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2024
Sprache Englisch
Identifikator ISSN: 2698-4016, 2698-4008
KITopen-ID: 1000169222
HGF-Programm 12.11.34 (POF IV, LK 01) Improved predictions from weather to climate scales
Erschienen in Weather and Climate Dynamics
Verlag Copernicus Publications
Band 5
Heft 1
Seiten 181–209
Vorab online veröffentlicht am 08.02.2024
Nachgewiesen in Scopus
Dimensions
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