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...
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ftdoajarticles:oai:doaj.org/article:dc225187b60240e9b991467d9dcbc688 2024-01-21T10:06:42+01:00 Connecting North Atlantic SST Variability to European Heat Events over the Past Decades Julian Krüger Joakim Kjellsson Robin Pilch Kedzierski Martin Claus 2023-11-01T00:00:00Z https://doi.org/10.16993/tellusa.3235 https://doaj.org/article/dc225187b60240e9b991467d9dcbc688 EN eng Stockholm University Press https://account.a.tellusjournals.se/index.php/su-j-tadmo/article/view/3235 https://doaj.org/toc/1600-0870 1600-0870 doi:10.16993/tellusa.3235 https://doaj.org/article/dc225187b60240e9b991467d9dcbc688 Tellus: Series A, Dynamic Meteorology and Oceanography, Vol 75, Iss 1, Pp 358–374-358–374 (2023) north atlantic sst european heat events trough–ridge pattern thermodynamical mechanisms planetary waves rossby wave packets Oceanography GC1-1581 Meteorology. Climatology QC851-999 article 2023 ftdoajarticles https://doi.org/10.16993/tellusa.3235 2023-12-24T01:40:24Z 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 Directory of Open Access Journals: DOAJ Articles Greenland Tellus A: Dynamic Meteorology and Oceanography 75 1 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
north atlantic sst european heat events trough–ridge pattern thermodynamical mechanisms planetary waves rossby wave packets Oceanography GC1-1581 Meteorology. Climatology QC851-999 |
spellingShingle |
north atlantic sst european heat events trough–ridge pattern thermodynamical mechanisms planetary waves rossby wave packets Oceanography GC1-1581 Meteorology. Climatology QC851-999 Julian Krüger Joakim Kjellsson Robin Pilch Kedzierski Martin Claus Connecting North Atlantic SST Variability to European Heat Events over the Past Decades |
topic_facet |
north atlantic sst european heat events trough–ridge pattern thermodynamical mechanisms planetary waves rossby wave packets Oceanography GC1-1581 Meteorology. Climatology QC851-999 |
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 |
Julian Krüger Joakim Kjellsson Robin Pilch Kedzierski Martin Claus |
author_facet |
Julian Krüger Joakim Kjellsson Robin Pilch Kedzierski Martin Claus |
author_sort |
Julian Krüger |
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://doi.org/10.16993/tellusa.3235 https://doaj.org/article/dc225187b60240e9b991467d9dcbc688 |
geographic |
Greenland |
geographic_facet |
Greenland |
genre |
Greenland North Atlantic |
genre_facet |
Greenland North Atlantic |
op_source |
Tellus: Series A, Dynamic Meteorology and Oceanography, Vol 75, Iss 1, Pp 358–374-358–374 (2023) |
op_relation |
https://account.a.tellusjournals.se/index.php/su-j-tadmo/article/view/3235 https://doaj.org/toc/1600-0870 1600-0870 doi:10.16993/tellusa.3235 https://doaj.org/article/dc225187b60240e9b991467d9dcbc688 |
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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1788697190590316544 |