Estimates of the North Atlantic Oscillation back to 1692 using a Paris-London westerly index
A westerly index for Europe is developed back to 1692 using newly recovered and corrected Mean Sea-level Pressure (MSLP) data from London and Paris. The index is compared against various instrumental and proxy indices of the North Atlantic Oscillation (NAO). In the winter, the Paris-London index dep...
Published in: | International Journal of Climatology |
---|---|
Main Authors: | , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
Published: |
2013
|
Subjects: | |
Online Access: | https://ueaeprints.uea.ac.uk/id/eprint/37832/ https://doi.org/10.1002/joc.3416 |
id |
ftuniveastangl:oai:ueaeprints.uea.ac.uk:37832 |
---|---|
record_format |
openpolar |
spelling |
ftuniveastangl:oai:ueaeprints.uea.ac.uk:37832 2023-06-06T11:57:04+02:00 Estimates of the North Atlantic Oscillation back to 1692 using a Paris-London westerly index Cornes, Richard C. Jones, Philip D. Briffa, Keith R. Osborn, Timothy J. 2013-01 https://ueaeprints.uea.ac.uk/id/eprint/37832/ https://doi.org/10.1002/joc.3416 unknown Cornes, Richard C., Jones, Philip D., Briffa, Keith R. and Osborn, Timothy J. (2013) Estimates of the North Atlantic Oscillation back to 1692 using a Paris-London westerly index. International Journal of Climatology, 33 (1). pp. 228-248. ISSN 1097-0088 doi:10.1002/joc.3416 Article PeerReviewed 2013 ftuniveastangl https://doi.org/10.1002/joc.3416 2023-04-13T22:31:40Z A westerly index for Europe is developed back to 1692 using newly recovered and corrected Mean Sea-level Pressure (MSLP) data from London and Paris. The index is compared against various instrumental and proxy indices of the North Atlantic Oscillation (NAO). In the winter, the Paris-London index depicts a spatial pattern of atmospheric circulation that is bi-modal, with centres of action that are shifted eastwards compared to the NAO. Owing to asymmetry in the NAO the Paris-London index provides a good depiction of positive NAO conditions as well as extreme negative phases of the NAO that arise from reversals of the pressure centres, but less extreme negative NAO conditions are associated with westerly index values approaching zero. The merit in using the Paris-London index lies with its consistency over time as a measure of westerly wind flow, which may not be the case with other proxy-based indices. In the summer, the Paris-London index bears a close relationship to the reconstructed high-summer NAO series of Folland et al. (2009) as well as the summer Luterbacher et al. (1999) NAO reconstruction. An important finding is that the summer NAO was highly variable during the early nineteenth century but was predominately positive on the decadal time scale during that period. Since circa 1970 the summer index has mostly been negative, indicating reduced westerlies and increased blocking conditions that are exceptional in the context of the last 250 years. Copyright © 2012 Royal Meteorological Society Article in Journal/Newspaper North Atlantic North Atlantic oscillation University of East Anglia: UEA Digital Repository Folland ENVELOPE(7.471,7.471,63.004,63.004) International Journal of Climatology 33 1 228 248 |
institution |
Open Polar |
collection |
University of East Anglia: UEA Digital Repository |
op_collection_id |
ftuniveastangl |
language |
unknown |
description |
A westerly index for Europe is developed back to 1692 using newly recovered and corrected Mean Sea-level Pressure (MSLP) data from London and Paris. The index is compared against various instrumental and proxy indices of the North Atlantic Oscillation (NAO). In the winter, the Paris-London index depicts a spatial pattern of atmospheric circulation that is bi-modal, with centres of action that are shifted eastwards compared to the NAO. Owing to asymmetry in the NAO the Paris-London index provides a good depiction of positive NAO conditions as well as extreme negative phases of the NAO that arise from reversals of the pressure centres, but less extreme negative NAO conditions are associated with westerly index values approaching zero. The merit in using the Paris-London index lies with its consistency over time as a measure of westerly wind flow, which may not be the case with other proxy-based indices. In the summer, the Paris-London index bears a close relationship to the reconstructed high-summer NAO series of Folland et al. (2009) as well as the summer Luterbacher et al. (1999) NAO reconstruction. An important finding is that the summer NAO was highly variable during the early nineteenth century but was predominately positive on the decadal time scale during that period. Since circa 1970 the summer index has mostly been negative, indicating reduced westerlies and increased blocking conditions that are exceptional in the context of the last 250 years. Copyright © 2012 Royal Meteorological Society |
format |
Article in Journal/Newspaper |
author |
Cornes, Richard C. Jones, Philip D. Briffa, Keith R. Osborn, Timothy J. |
spellingShingle |
Cornes, Richard C. Jones, Philip D. Briffa, Keith R. Osborn, Timothy J. Estimates of the North Atlantic Oscillation back to 1692 using a Paris-London westerly index |
author_facet |
Cornes, Richard C. Jones, Philip D. Briffa, Keith R. Osborn, Timothy J. |
author_sort |
Cornes, Richard C. |
title |
Estimates of the North Atlantic Oscillation back to 1692 using a Paris-London westerly index |
title_short |
Estimates of the North Atlantic Oscillation back to 1692 using a Paris-London westerly index |
title_full |
Estimates of the North Atlantic Oscillation back to 1692 using a Paris-London westerly index |
title_fullStr |
Estimates of the North Atlantic Oscillation back to 1692 using a Paris-London westerly index |
title_full_unstemmed |
Estimates of the North Atlantic Oscillation back to 1692 using a Paris-London westerly index |
title_sort |
estimates of the north atlantic oscillation back to 1692 using a paris-london westerly index |
publishDate |
2013 |
url |
https://ueaeprints.uea.ac.uk/id/eprint/37832/ https://doi.org/10.1002/joc.3416 |
long_lat |
ENVELOPE(7.471,7.471,63.004,63.004) |
geographic |
Folland |
geographic_facet |
Folland |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
Cornes, Richard C., Jones, Philip D., Briffa, Keith R. and Osborn, Timothy J. (2013) Estimates of the North Atlantic Oscillation back to 1692 using a Paris-London westerly index. International Journal of Climatology, 33 (1). pp. 228-248. ISSN 1097-0088 doi:10.1002/joc.3416 |
op_doi |
https://doi.org/10.1002/joc.3416 |
container_title |
International Journal of Climatology |
container_volume |
33 |
container_issue |
1 |
container_start_page |
228 |
op_container_end_page |
248 |
_version_ |
1767965025252671488 |