Stability of weather regimes during the last millennium from climate simulations
The variability of the extra-tropical atmospheric circulation and its potential dependence on external forcings have been debated topics in climate modeling and observation communities. A recent reconstruction of the North Atlantic Oscillation Index has argued that the Medieval Warm Period period yi...
Main Authors: | , , , , , |
---|---|
Format: | Text |
Language: | English |
Published: |
2012
|
Subjects: | |
Online Access: | http://www.documentation.ird.fr/hor/fdi:010055869 |
id |
ftird:oai:ird.fr:fdi:010055869 |
---|---|
record_format |
openpolar |
spelling |
ftird:oai:ird.fr:fdi:010055869 2023-05-15T17:30:38+02:00 Stability of weather regimes during the last millennium from climate simulations Yiou, P. Servonnat, J. Yoshimori, M. Swingedouw, D. Khodri, Myriam Abe-Ouchi, A. 2012 http://www.documentation.ird.fr/hor/fdi:010055869 EN eng http://www.documentation.ird.fr/hor/fdi:010055869 oai:ird.fr:fdi:010055869 Yiou P., Servonnat J., Yoshimori M., Swingedouw D., Khodri Myriam, Abe-Ouchi A. Stability of weather regimes during the last millennium from climate simulations. Geophysical Research Letters, 2012, 39, p. L08703. text 2012 ftird 2020-08-21T06:55:30Z The variability of the extra-tropical atmospheric circulation and its potential dependence on external forcings have been debated topics in climate modeling and observation communities. A recent reconstruction of the North Atlantic Oscillation Index has argued that the Medieval Warm Period period yielded a persistent positive phase of this index in contrast with an oscillating mode during the Little Ice Age. This paper tests whether this feature can be obtained, in millennium simulations from three different climate models. We examine the daily atmospheric dynamics that drives the main modes of extra-tropical variability. We find that the transition from a Medieval Warm Period to a Little Ice Age in the North Atlantic does not imply changes in patterns or frequency of weather regimes, although the mean surface temperature change is significant. This implies that the interpretation of proxy records in terms of atmospheric variability should be revised in order to take into account the structure of daily meteorological patterns, and/or climate models are too constrained to infer large changes of atmospheric variability. Citation: Yiou, P., J. Servonnat, M. Yoshimori, D. Swingedouw, M. Khodri, and A. Abe-Ouchi (2012), Stability of weather regimes during the last millennium from climate simulations, Geophys. Res. Lett., 39, L08703, doi:10.1029/2012GL051310. Text North Atlantic North Atlantic oscillation IRD (Institute de recherche pour le développement): Horizon |
institution |
Open Polar |
collection |
IRD (Institute de recherche pour le développement): Horizon |
op_collection_id |
ftird |
language |
English |
description |
The variability of the extra-tropical atmospheric circulation and its potential dependence on external forcings have been debated topics in climate modeling and observation communities. A recent reconstruction of the North Atlantic Oscillation Index has argued that the Medieval Warm Period period yielded a persistent positive phase of this index in contrast with an oscillating mode during the Little Ice Age. This paper tests whether this feature can be obtained, in millennium simulations from three different climate models. We examine the daily atmospheric dynamics that drives the main modes of extra-tropical variability. We find that the transition from a Medieval Warm Period to a Little Ice Age in the North Atlantic does not imply changes in patterns or frequency of weather regimes, although the mean surface temperature change is significant. This implies that the interpretation of proxy records in terms of atmospheric variability should be revised in order to take into account the structure of daily meteorological patterns, and/or climate models are too constrained to infer large changes of atmospheric variability. Citation: Yiou, P., J. Servonnat, M. Yoshimori, D. Swingedouw, M. Khodri, and A. Abe-Ouchi (2012), Stability of weather regimes during the last millennium from climate simulations, Geophys. Res. Lett., 39, L08703, doi:10.1029/2012GL051310. |
format |
Text |
author |
Yiou, P. Servonnat, J. Yoshimori, M. Swingedouw, D. Khodri, Myriam Abe-Ouchi, A. |
spellingShingle |
Yiou, P. Servonnat, J. Yoshimori, M. Swingedouw, D. Khodri, Myriam Abe-Ouchi, A. Stability of weather regimes during the last millennium from climate simulations |
author_facet |
Yiou, P. Servonnat, J. Yoshimori, M. Swingedouw, D. Khodri, Myriam Abe-Ouchi, A. |
author_sort |
Yiou, P. |
title |
Stability of weather regimes during the last millennium from climate simulations |
title_short |
Stability of weather regimes during the last millennium from climate simulations |
title_full |
Stability of weather regimes during the last millennium from climate simulations |
title_fullStr |
Stability of weather regimes during the last millennium from climate simulations |
title_full_unstemmed |
Stability of weather regimes during the last millennium from climate simulations |
title_sort |
stability of weather regimes during the last millennium from climate simulations |
publishDate |
2012 |
url |
http://www.documentation.ird.fr/hor/fdi:010055869 |
genre |
North Atlantic North Atlantic oscillation |
genre_facet |
North Atlantic North Atlantic oscillation |
op_relation |
http://www.documentation.ird.fr/hor/fdi:010055869 oai:ird.fr:fdi:010055869 Yiou P., Servonnat J., Yoshimori M., Swingedouw D., Khodri Myriam, Abe-Ouchi A. Stability of weather regimes during the last millennium from climate simulations. Geophysical Research Letters, 2012, 39, p. L08703. |
_version_ |
1766127499514740736 |