Implications of Winter NAO Flavors on Present and Future European Climate
The North Atlantic Oscillation (NAO), a basic variability mode in the Northern Hemisphere, undergoes changes in its temporal and spatial characteristics, with significant implications on European climate. In this paper, different NAO flavors are distinguished for winter in simulations of a Coupled A...
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ftmdpi:oai:mdpi.com:/2225-1154/8/1/13/ 2023-08-20T04:08:16+02:00 Implications of Winter NAO Flavors on Present and Future European Climate Efi Rousi Henning W. Rust Uwe Ulbrich Christina Anagnostopoulou agris 2020-01-14 application/pdf https://doi.org/10.3390/cli8010013 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/cli8010013 https://creativecommons.org/licenses/by/4.0/ Climate; Volume 8; Issue 1; Pages: 13 North Atlantic Oscillation NAO flavors temperature precipitation Self-Organizing Maps ECHAM5 Text 2020 ftmdpi https://doi.org/10.3390/cli8010013 2023-07-31T22:59:54Z The North Atlantic Oscillation (NAO), a basic variability mode in the Northern Hemisphere, undergoes changes in its temporal and spatial characteristics, with significant implications on European climate. In this paper, different NAO flavors are distinguished for winter in simulations of a Coupled Atmosphere-Ocean GCM, using Self-Organizing Maps, a topology preserving clustering algorithm. These flavors refer to various sub-forms of the NAO pattern, reflecting the range of positions occupied by its action centers, the Icelandic Low and the Azores High. After having defined the NAO flavors, composites of winter temperature and precipitation over Europe are created for each one of them. The results reveal significant differences between NAO flavors in terms of their effects on the European climate. Generally, the eastwardly shifted NAO patterns induce a stronger than average influence on European temperatures. In contrast, the effects of NAO flavors on European precipitation anomalies are less coherent, with various areas responding differently. These results confirm that not only the temporal, but also the spatial variability of NAO is important in regulating European climate. Text North Atlantic North Atlantic oscillation MDPI Open Access Publishing Climate 8 1 13 |
institution |
Open Polar |
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MDPI Open Access Publishing |
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ftmdpi |
language |
English |
topic |
North Atlantic Oscillation NAO flavors temperature precipitation Self-Organizing Maps ECHAM5 |
spellingShingle |
North Atlantic Oscillation NAO flavors temperature precipitation Self-Organizing Maps ECHAM5 Efi Rousi Henning W. Rust Uwe Ulbrich Christina Anagnostopoulou Implications of Winter NAO Flavors on Present and Future European Climate |
topic_facet |
North Atlantic Oscillation NAO flavors temperature precipitation Self-Organizing Maps ECHAM5 |
description |
The North Atlantic Oscillation (NAO), a basic variability mode in the Northern Hemisphere, undergoes changes in its temporal and spatial characteristics, with significant implications on European climate. In this paper, different NAO flavors are distinguished for winter in simulations of a Coupled Atmosphere-Ocean GCM, using Self-Organizing Maps, a topology preserving clustering algorithm. These flavors refer to various sub-forms of the NAO pattern, reflecting the range of positions occupied by its action centers, the Icelandic Low and the Azores High. After having defined the NAO flavors, composites of winter temperature and precipitation over Europe are created for each one of them. The results reveal significant differences between NAO flavors in terms of their effects on the European climate. Generally, the eastwardly shifted NAO patterns induce a stronger than average influence on European temperatures. In contrast, the effects of NAO flavors on European precipitation anomalies are less coherent, with various areas responding differently. These results confirm that not only the temporal, but also the spatial variability of NAO is important in regulating European climate. |
format |
Text |
author |
Efi Rousi Henning W. Rust Uwe Ulbrich Christina Anagnostopoulou |
author_facet |
Efi Rousi Henning W. Rust Uwe Ulbrich Christina Anagnostopoulou |
author_sort |
Efi Rousi |
title |
Implications of Winter NAO Flavors on Present and Future European Climate |
title_short |
Implications of Winter NAO Flavors on Present and Future European Climate |
title_full |
Implications of Winter NAO Flavors on Present and Future European Climate |
title_fullStr |
Implications of Winter NAO Flavors on Present and Future European Climate |
title_full_unstemmed |
Implications of Winter NAO Flavors on Present and Future European Climate |
title_sort |
implications of winter nao flavors on present and future european climate |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2020 |
url |
https://doi.org/10.3390/cli8010013 |
op_coverage |
agris |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_source |
Climate; Volume 8; Issue 1; Pages: 13 |
op_relation |
https://dx.doi.org/10.3390/cli8010013 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/cli8010013 |
container_title |
Climate |
container_volume |
8 |
container_issue |
1 |
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13 |
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1774720430391689216 |