Connecting North Atlantic SST Variability to European Heat Events over the Past Decades
The occurrence of European heat events has increased during the last two decades. European heat events are responsible for social, economic and environmental damage and are projected to increase in magnitude, frequency and duration under global warming, strengthening the interest about the contribut...
Published in: | Tellus A: Dynamic Meteorology and Oceanography |
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Stockholm University Press
2023
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ftoceanrep:oai:oceanrep.geomar.de:59487 2024-02-11T10:04:25+01:00 Connecting North Atlantic SST Variability to European Heat Events over the Past Decades Krüger, Julian Kjellsson, Joakim Kedzierski, Robin P. Claus, Martin 2023-11-20 text https://oceanrep.geomar.de/id/eprint/59487/ https://oceanrep.geomar.de/id/eprint/59487/1/Kr%C3%BCger_Tellus_a_2023.pdf https://a.tellusjournals.se/articles/10.16993/tellusa.3235 https://doi.org/10.16993/tellusa.3235 en eng Stockholm University Press https://oceanrep.geomar.de/id/eprint/59487/1/Kr%C3%BCger_Tellus_a_2023.pdf Krüger, J. , Kjellsson, J. , Kedzierski, R. P. and Claus, M. (2023) Connecting North Atlantic SST Variability to European Heat Events over the Past Decades. Open Access Tellus A: Dynamic meteorology and oceanography, 75 (1). pp. 358-374. DOI 10.16993/tellusa.3235 <https://doi.org/10.16993/tellusa.3235>. doi:10.16993/tellusa.3235 cc_by_4.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2023 ftoceanrep https://doi.org/10.16993/tellusa.3235 2024-01-15T00:28:03Z The occurrence of European heat events has increased during the last two decades. European heat events are responsible for social, economic and environmental damage and are projected to increase in magnitude, frequency and duration under global warming, strengthening the interest about the contribution of different mechanisms. Using the ERA5 reanalysis product, we go beyond case studies relating European heat events with cold North Atlantic sea surface temperatures (SSTs), and perform a systematic approach with a composite analysis to investigate the link between North Atlantic SSTs in a domain south of Greenland and the 2m air temperature (T2m) over central Europe. Composites of different North Atlantic SST states show that events with a negative tendency of North Atlantic SSTs are often followed by positive European T2m anomalies during summers when the North Atlantic SSTs are persistently low for several months. Enhanced lower–tropospheric baroclinicity in the North Atlantic is followed during these events by a slantwise ascent and an enhanced upper–tropospheric waveguide, promoting a downstream development of an European ridge. A combination of a wave number 3 pattern and regionally confined Rossby wave activity contribute to a trough–ridge pattern in the North Atlantic–European sector. A composite of European heat events further confirms the lagged statistical relationship between cold North Atlantic SSTs with a negative tendency and positive European T2m anomalies. A negative tendency of North Atlantic SSTs precedes 15 of 18 European heat events, and cold North Atlantic SST conditions are present during 14 of 18 European heat events. Article in Journal/Newspaper Greenland North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Greenland Tellus A: Dynamic Meteorology and Oceanography 75 1 |
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Open Polar |
collection |
OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
op_collection_id |
ftoceanrep |
language |
English |
description |
The occurrence of European heat events has increased during the last two decades. European heat events are responsible for social, economic and environmental damage and are projected to increase in magnitude, frequency and duration under global warming, strengthening the interest about the contribution of different mechanisms. Using the ERA5 reanalysis product, we go beyond case studies relating European heat events with cold North Atlantic sea surface temperatures (SSTs), and perform a systematic approach with a composite analysis to investigate the link between North Atlantic SSTs in a domain south of Greenland and the 2m air temperature (T2m) over central Europe. Composites of different North Atlantic SST states show that events with a negative tendency of North Atlantic SSTs are often followed by positive European T2m anomalies during summers when the North Atlantic SSTs are persistently low for several months. Enhanced lower–tropospheric baroclinicity in the North Atlantic is followed during these events by a slantwise ascent and an enhanced upper–tropospheric waveguide, promoting a downstream development of an European ridge. A combination of a wave number 3 pattern and regionally confined Rossby wave activity contribute to a trough–ridge pattern in the North Atlantic–European sector. A composite of European heat events further confirms the lagged statistical relationship between cold North Atlantic SSTs with a negative tendency and positive European T2m anomalies. A negative tendency of North Atlantic SSTs precedes 15 of 18 European heat events, and cold North Atlantic SST conditions are present during 14 of 18 European heat events. |
format |
Article in Journal/Newspaper |
author |
Krüger, Julian Kjellsson, Joakim Kedzierski, Robin P. Claus, Martin |
spellingShingle |
Krüger, Julian Kjellsson, Joakim Kedzierski, Robin P. Claus, Martin Connecting North Atlantic SST Variability to European Heat Events over the Past Decades |
author_facet |
Krüger, Julian Kjellsson, Joakim Kedzierski, Robin P. Claus, Martin |
author_sort |
Krüger, Julian |
title |
Connecting North Atlantic SST Variability to European Heat Events over the Past Decades |
title_short |
Connecting North Atlantic SST Variability to European Heat Events over the Past Decades |
title_full |
Connecting North Atlantic SST Variability to European Heat Events over the Past Decades |
title_fullStr |
Connecting North Atlantic SST Variability to European Heat Events over the Past Decades |
title_full_unstemmed |
Connecting North Atlantic SST Variability to European Heat Events over the Past Decades |
title_sort |
connecting north atlantic sst variability to european heat events over the past decades |
publisher |
Stockholm University Press |
publishDate |
2023 |
url |
https://oceanrep.geomar.de/id/eprint/59487/ https://oceanrep.geomar.de/id/eprint/59487/1/Kr%C3%BCger_Tellus_a_2023.pdf https://a.tellusjournals.se/articles/10.16993/tellusa.3235 https://doi.org/10.16993/tellusa.3235 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland North Atlantic |
genre_facet |
Greenland North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/59487/1/Kr%C3%BCger_Tellus_a_2023.pdf Krüger, J. , Kjellsson, J. , Kedzierski, R. P. and Claus, M. (2023) Connecting North Atlantic SST Variability to European Heat Events over the Past Decades. Open Access Tellus A: Dynamic meteorology and oceanography, 75 (1). pp. 358-374. DOI 10.16993/tellusa.3235 <https://doi.org/10.16993/tellusa.3235>. doi:10.16993/tellusa.3235 |
op_rights |
cc_by_4.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.16993/tellusa.3235 |
container_title |
Tellus A: Dynamic Meteorology and Oceanography |
container_volume |
75 |
container_issue |
1 |
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1790601017440600064 |