Recent changes in measured wind in the NE Atlantic and variability of correlation with NAO
International audience The paper deals with wind measurements, recorded since the 1950s, at twelve meteorological stations along a transect near the westernmost European border, between 64° and 44° N. Extreme wind speed tends to decrease sharply near the northern boundary (at Reykjavick), near the m...
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Format: | Article in Journal/Newspaper |
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Online Access: | https://hal.science/hal-00553202 https://hal.science/hal-00553202/document https://hal.science/hal-00553202/file/Pirazzoli_et_al.pdf https://doi.org/10.5194/angeo-28-1923-2010 |
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ftunivparis1:oai:HAL:hal-00553202v1 2024-02-11T10:05:16+01:00 Recent changes in measured wind in the NE Atlantic and variability of correlation with NAO Pirazzoli, Paolo Tomasin, A. Ullmann, Albin Laboratoire de géographie physique : Environnements Quaternaires et Actuels (LGP) Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS) Department of Applied Mathematics University of Ca’ Foscari Venice, Italy Centre de Recherches de Climatologie (CRC) Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS) 2010-10-25 https://hal.science/hal-00553202 https://hal.science/hal-00553202/document https://hal.science/hal-00553202/file/Pirazzoli_et_al.pdf https://doi.org/10.5194/angeo-28-1923-2010 en eng HAL CCSD European Geosciences Union info:eu-repo/semantics/altIdentifier/doi/10.5194/angeo-28-1923-2010 hal-00553202 https://hal.science/hal-00553202 https://hal.science/hal-00553202/document https://hal.science/hal-00553202/file/Pirazzoli_et_al.pdf doi:10.5194/angeo-28-1923-2010 info:eu-repo/semantics/OpenAccess ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00553202 Annales Geophysicae, 2010, 28, pp.1923-1934. ⟨10.5194/angeo-28-1923-2010⟩ Atmospheric dynamics Climatology General circulation [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDE.MCG]Environmental Sciences/Global Changes info:eu-repo/semantics/article Journal articles 2010 ftunivparis1 https://doi.org/10.5194/angeo-28-1923-2010 2024-01-23T23:37:05Z International audience The paper deals with wind measurements, recorded since the 1950s, at twelve meteorological stations along a transect near the westernmost European border, between 64° and 44° N. Extreme wind speed tends to decrease sharply near the northern boundary (at Reykjavick), near the middle of the study area (at Shannon and Valentia) and near the southern boundary (at Brest and Cap Ferret), to increase at Thorshavn, with less significant trends at the other stations. Average wind speeds confirm the above tendencies, with an additional increasing speed at Lerwick, Kirkwall, Malin Head, Belle-Ile and Cap Ferret. To compare changes in wind activity, the data have been subdivided into three periods: until 1975, 1976–1992 and 1993–2008. Frequencies have been computed also for the “winter” (October to March) period, per quadrants, and for occurrences exceeding the speed of 15ms−1. At Reykjavick a recent increase in the frequency of strong winds has occurred from various directions. Between 62° N (Thorshavn) and 59° N (Kirkwall) strong wind has been increasing since 1975. Minor changes can be observed at Stornoway, whereas at Malin Head the greatest increase for southerlies and westerlies is observed during the 1976–1992 period. At Belmullet, the frequency of strong southerlies has almost doubled since 1992, while at Shannon and Valentia it remains quite low. Finally at Brest and Belle-Ile, westerlies are predominant among winds >15ms−1. Important changes in time and latitude appear in the correlation with the NAO (North Atlantic Oscillation) index. The highest correlation coefficients, calculated with monthly or seasonal means between the early 1950s and 1975, are observed from between 58° N (Stornoway) and Iceland, whereas low positive coefficients are reported more south. During the period 1976–1992, when increasing NAO index is predominant, positive correlation improves southwards as far as 54° (Belmullet) with some improvement also at Shannon and Valentia, while it remains low or even negative ... Article in Journal/Newspaper Iceland North Atlantic North Atlantic oscillation Thorshavn Université Paris 1 Panthéon-Sorbonne: HAL Belle Ile ENVELOPE(-109.102,-109.102,62.684,62.684) Thorshavn ENVELOPE(71.083,71.083,-68.683,-68.683) Annales Geophysicae 28 10 1923 1934 |
institution |
Open Polar |
collection |
Université Paris 1 Panthéon-Sorbonne: HAL |
op_collection_id |
ftunivparis1 |
language |
English |
topic |
Atmospheric dynamics Climatology General circulation [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDE.MCG]Environmental Sciences/Global Changes |
spellingShingle |
Atmospheric dynamics Climatology General circulation [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDE.MCG]Environmental Sciences/Global Changes Pirazzoli, Paolo Tomasin, A. Ullmann, Albin Recent changes in measured wind in the NE Atlantic and variability of correlation with NAO |
topic_facet |
Atmospheric dynamics Climatology General circulation [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology [SDU.OCEAN]Sciences of the Universe [physics]/Ocean Atmosphere [SDE.MCG]Environmental Sciences/Global Changes |
description |
International audience The paper deals with wind measurements, recorded since the 1950s, at twelve meteorological stations along a transect near the westernmost European border, between 64° and 44° N. Extreme wind speed tends to decrease sharply near the northern boundary (at Reykjavick), near the middle of the study area (at Shannon and Valentia) and near the southern boundary (at Brest and Cap Ferret), to increase at Thorshavn, with less significant trends at the other stations. Average wind speeds confirm the above tendencies, with an additional increasing speed at Lerwick, Kirkwall, Malin Head, Belle-Ile and Cap Ferret. To compare changes in wind activity, the data have been subdivided into three periods: until 1975, 1976–1992 and 1993–2008. Frequencies have been computed also for the “winter” (October to March) period, per quadrants, and for occurrences exceeding the speed of 15ms−1. At Reykjavick a recent increase in the frequency of strong winds has occurred from various directions. Between 62° N (Thorshavn) and 59° N (Kirkwall) strong wind has been increasing since 1975. Minor changes can be observed at Stornoway, whereas at Malin Head the greatest increase for southerlies and westerlies is observed during the 1976–1992 period. At Belmullet, the frequency of strong southerlies has almost doubled since 1992, while at Shannon and Valentia it remains quite low. Finally at Brest and Belle-Ile, westerlies are predominant among winds >15ms−1. Important changes in time and latitude appear in the correlation with the NAO (North Atlantic Oscillation) index. The highest correlation coefficients, calculated with monthly or seasonal means between the early 1950s and 1975, are observed from between 58° N (Stornoway) and Iceland, whereas low positive coefficients are reported more south. During the period 1976–1992, when increasing NAO index is predominant, positive correlation improves southwards as far as 54° (Belmullet) with some improvement also at Shannon and Valentia, while it remains low or even negative ... |
author2 |
Laboratoire de géographie physique : Environnements Quaternaires et Actuels (LGP) Université Paris 1 Panthéon-Sorbonne (UP1)-Université Paris-Est Créteil Val-de-Marne - Paris 12 (UPEC UP12)-Centre National de la Recherche Scientifique (CNRS) Department of Applied Mathematics University of Ca’ Foscari Venice, Italy Centre de Recherches de Climatologie (CRC) Université de Bourgogne (UB)-Centre National de la Recherche Scientifique (CNRS) |
format |
Article in Journal/Newspaper |
author |
Pirazzoli, Paolo Tomasin, A. Ullmann, Albin |
author_facet |
Pirazzoli, Paolo Tomasin, A. Ullmann, Albin |
author_sort |
Pirazzoli, Paolo |
title |
Recent changes in measured wind in the NE Atlantic and variability of correlation with NAO |
title_short |
Recent changes in measured wind in the NE Atlantic and variability of correlation with NAO |
title_full |
Recent changes in measured wind in the NE Atlantic and variability of correlation with NAO |
title_fullStr |
Recent changes in measured wind in the NE Atlantic and variability of correlation with NAO |
title_full_unstemmed |
Recent changes in measured wind in the NE Atlantic and variability of correlation with NAO |
title_sort |
recent changes in measured wind in the ne atlantic and variability of correlation with nao |
publisher |
HAL CCSD |
publishDate |
2010 |
url |
https://hal.science/hal-00553202 https://hal.science/hal-00553202/document https://hal.science/hal-00553202/file/Pirazzoli_et_al.pdf https://doi.org/10.5194/angeo-28-1923-2010 |
long_lat |
ENVELOPE(-109.102,-109.102,62.684,62.684) ENVELOPE(71.083,71.083,-68.683,-68.683) |
geographic |
Belle Ile Thorshavn |
geographic_facet |
Belle Ile Thorshavn |
genre |
Iceland North Atlantic North Atlantic oscillation Thorshavn |
genre_facet |
Iceland North Atlantic North Atlantic oscillation Thorshavn |
op_source |
ISSN: 0992-7689 EISSN: 1432-0576 Annales Geophysicae https://hal.science/hal-00553202 Annales Geophysicae, 2010, 28, pp.1923-1934. ⟨10.5194/angeo-28-1923-2010⟩ |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.5194/angeo-28-1923-2010 hal-00553202 https://hal.science/hal-00553202 https://hal.science/hal-00553202/document https://hal.science/hal-00553202/file/Pirazzoli_et_al.pdf doi:10.5194/angeo-28-1923-2010 |
op_rights |
info:eu-repo/semantics/OpenAccess |
op_doi |
https://doi.org/10.5194/angeo-28-1923-2010 |
container_title |
Annales Geophysicae |
container_volume |
28 |
container_issue |
10 |
container_start_page |
1923 |
op_container_end_page |
1934 |
_version_ |
1790602203054997504 |