Abrupt and persistent atmospheric circulation changes in the North Atlantic under La Niña conditions
Several recent studies have linked the exceptional North Atlantic and Eurasian atmospheric evolution during late February and March 2018 to the Sudden Stratospheric Warming (SSW) that took place a few weeks earlier. February 2018 was characterized by an abrupt transition from the positive to the neg...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2023-12-01
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| Series: | Weather and Climate Extremes |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2212094723000622 |
| _version_ | 1797385254884868096 |
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| author | Marina García-Burgos Iñigo Gómara Belén Rodríguez-Fonseca Juan Jesús González-Alemán Pablo Zurita-Gotor Blanca Ayarzagüena |
| author_facet | Marina García-Burgos Iñigo Gómara Belén Rodríguez-Fonseca Juan Jesús González-Alemán Pablo Zurita-Gotor Blanca Ayarzagüena |
| author_sort | Marina García-Burgos |
| collection | DOAJ |
| description | Several recent studies have linked the exceptional North Atlantic and Eurasian atmospheric evolution during late February and March 2018 to the Sudden Stratospheric Warming (SSW) that took place a few weeks earlier. February 2018 was characterized by an abrupt transition from the positive to the negative phase of the North Atlantic Oscillation (NAO) and a subsequent persistence of the negative NAO for several weeks. This paper investigates the contribution of atmospheric and oceanic phenomena to both the 2018 event and a set of 19 identified analogues (including the former) for the period 1959–2022. Evidence is given that La Niña conditions in the tropical Pacific and upstream North Atlantic cyclones play an important role as a trigger for these events. Ensuing two-way tropospheric-stratospheric coupling and eddy feedbacks provide extended-range persistence for negative NAO conditions. These results may help improve the prediction of such exceptional events. |
| first_indexed | 2024-03-08T21:51:36Z |
| format | Article |
| id | doaj.art-f456f18adcf144b6a3bc707e3d8fa85b |
| institution | Directory Open Access Journal |
| issn | 2212-0947 |
| language | English |
| last_indexed | 2024-03-08T21:51:36Z |
| publishDate | 2023-12-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Weather and Climate Extremes |
| spelling | doaj.art-f456f18adcf144b6a3bc707e3d8fa85b2023-12-20T07:34:22ZengElsevierWeather and Climate Extremes2212-09472023-12-0142100609Abrupt and persistent atmospheric circulation changes in the North Atlantic under La Niña conditionsMarina García-Burgos0Iñigo Gómara1Belén Rodríguez-Fonseca2Juan Jesús González-Alemán3Pablo Zurita-Gotor4Blanca Ayarzagüena5Departamento de Física de la Tierra y Astrofísica, Universidad Complutense de Madrid, 28040, Madrid, Spain; Corresponding author. Departamento de Física de la Tierra y Astrofísica, Facultad de CC. Físicas, Universidad Complutense de Madrid, Spain.Departamento de Matemática Aplicada, Universidad de Valladolid, 40005, Segovia, Spain; Departamento de Física de la Tierra y Astrofísica, Universidad Complutense de Madrid, 28040, Madrid, SpainDepartamento de Física de la Tierra y Astrofísica, Universidad Complutense de Madrid, 28040, Madrid, Spain; Instituto de Geociencias (IGEO), UCM-CSIC, 28040, Madrid, SpainDepartamento de Física de la Tierra y Astrofísica, Universidad Complutense de Madrid, 28040, Madrid, SpainDepartamento de Física de la Tierra y Astrofísica, Universidad Complutense de Madrid, 28040, Madrid, Spain; Instituto de Geociencias (IGEO), UCM-CSIC, 28040, Madrid, SpainDepartamento de Física de la Tierra y Astrofísica, Universidad Complutense de Madrid, 28040, Madrid, SpainSeveral recent studies have linked the exceptional North Atlantic and Eurasian atmospheric evolution during late February and March 2018 to the Sudden Stratospheric Warming (SSW) that took place a few weeks earlier. February 2018 was characterized by an abrupt transition from the positive to the negative phase of the North Atlantic Oscillation (NAO) and a subsequent persistence of the negative NAO for several weeks. This paper investigates the contribution of atmospheric and oceanic phenomena to both the 2018 event and a set of 19 identified analogues (including the former) for the period 1959–2022. Evidence is given that La Niña conditions in the tropical Pacific and upstream North Atlantic cyclones play an important role as a trigger for these events. Ensuing two-way tropospheric-stratospheric coupling and eddy feedbacks provide extended-range persistence for negative NAO conditions. These results may help improve the prediction of such exceptional events.http://www.sciencedirect.com/science/article/pii/S2212094723000622 |
| spellingShingle | Marina García-Burgos Iñigo Gómara Belén Rodríguez-Fonseca Juan Jesús González-Alemán Pablo Zurita-Gotor Blanca Ayarzagüena Abrupt and persistent atmospheric circulation changes in the North Atlantic under La Niña conditions Weather and Climate Extremes |
| title | Abrupt and persistent atmospheric circulation changes in the North Atlantic under La Niña conditions |
| title_full | Abrupt and persistent atmospheric circulation changes in the North Atlantic under La Niña conditions |
| title_fullStr | Abrupt and persistent atmospheric circulation changes in the North Atlantic under La Niña conditions |
| title_full_unstemmed | Abrupt and persistent atmospheric circulation changes in the North Atlantic under La Niña conditions |
| title_short | Abrupt and persistent atmospheric circulation changes in the North Atlantic under La Niña conditions |
| title_sort | abrupt and persistent atmospheric circulation changes in the north atlantic under la nina conditions |
| url | http://www.sciencedirect.com/science/article/pii/S2212094723000622 |
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