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dc.contributor.author
Dätwyler, Christoph
dc.contributor.author
Neukom, Raphael
dc.contributor.author
Abram, Nerilie J.
dc.contributor.author
Gallant, Ailie J. E.
dc.contributor.author
Grosjean, Martin
dc.contributor.author
Jacques-Coper, Martín
dc.contributor.author
Karoly, David J.
dc.contributor.author
Villalba, Ricardo
dc.date.available
2018-08-28T22:09:30Z
dc.date.issued
2017-11
dc.identifier.citation
Dätwyler, Christoph; Neukom, Raphael; Abram, Nerilie J.; Gallant, Ailie J. E.; Grosjean, Martin; et al.; Teleconnection stationarity, variability and trends of the Southern Annular Mode (SAM) during the last millennium; Springer; Climate Dynamics; 51; 5-6; 11-2017; 2321-2339
dc.identifier.issn
0930-7575
dc.identifier.uri
http://hdl.handle.net/11336/57464
dc.description.abstract
The Southern Annular Mode (SAM) is the leading mode of atmospheric interannual variability in the Southern Hemisphere (SH) extra-tropics. Here, we assess the stationarity of SAM spatial correlations with instrumental and paleoclimate proxy data for the past millennium. The instrumental period shows that temporal non-stationarities in SAM teleconnections are not consistent across the SH land areas. This suggests that the influence of the SAM index is modulated by regional effects. However, within key-regions with good proxy data coverage (South America, Tasmania, New Zealand), teleconnections are mostly stationary over the instrumental period. Using different stationarity criteria for proxy record selection, we provide new austral summer and annual mean SAM index reconstructions over the last millennium. Our summer SAM reconstructions are very robust to changes in proxy record selection and the selection of the calibration period, particularly on the multi-decadal timescale. In contrast, the weaker performance and lower agreement in the annual mean SAM reconstructions point towards changing teleconnection patterns that may be particularly important outside the summer months. Our results clearly portend that the temporal stationarity of the proxy-climate relationships should be taken into account in the design of comprehensive regional and hemispherical climate reconstructions. The summer SAM reconstructions show no significant relationship to solar, greenhouse gas and volcanic forcing, with the exception of an extremely strong negative anomaly following the AD 1257 Samalas eruption. Furthermore, reconstructed pre-industrial summer SAM trends are very similar to trends obtained by model control simulations. We find that recent trends in the summer SAM lie outside the 5–95% range of pre-industrial natural variability.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Springer
dc.rights
info:eu-repo/semantics/openAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
Climate Change
dc.subject
Climate Reconstruction
dc.subject
Holocene
dc.subject
Paleoclimate
dc.subject
Southern Hemisphere
dc.subject.classification
Meteorología y Ciencias Atmosféricas
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Ciencias de la Tierra y relacionadas con el Medio Ambiente
dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
dc.title
Teleconnection stationarity, variability and trends of the Southern Annular Mode (SAM) during the last millennium
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2018-08-21T19:12:25Z
dc.journal.volume
51
dc.journal.number
5-6
dc.journal.pagination
2321-2339
dc.journal.pais
Alemania
dc.journal.ciudad
Berlin
dc.description.fil
Fil: Dätwyler, Christoph. University of Bern. Centre for Climate
Change Research. Institute of Geography and Oeschger ; Suiza
dc.description.fil
Fil: Neukom, Raphael. University of Bern. Centre for Climate
Change Research. Institute of Geography and Oeschger ; Suiza
dc.description.fil
Fil: Abram, Nerilie J.. Australian National University; Australia
dc.description.fil
Fil: Gallant, Ailie J. E.. Monash University; Australia
dc.description.fil
Fil: Grosjean, Martin. University of Bern. Centre for Climate
Change Research. Institute of Geography and Oeschger ; Suiza
dc.description.fil
Fil: Jacques-Coper, Martín. Universidad de Concepción; Chile
dc.description.fil
Fil: Karoly, David J.. University of Melbourne; Australia
dc.description.fil
Fil: Villalba, Ricardo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Provincia de Mendoza. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales. Universidad Nacional de Cuyo. Instituto Argentino de Nivología, Glaciología y Ciencias Ambientales; Argentina
dc.journal.title
Climate Dynamics
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/http://link.springer.com/10.1007/s00382-017-4015-0
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1007/s00382-017-4015-0
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