Multispectral analysis of Northern Hemisphere temperature record over the last five millennia

Aiming to describe spatio-temporal climate variability on decadal-to-centennial time scales and longer, we analyzed a data set of 26 proxy records extending back 1,000–5,000 years; all records chosen were calibrated to yield temperatures. The seven irregularly sampled series in the data set were int...

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Published in:Climate Dynamics
Main Authors: TARICCO, Carla, MANCUSO, SALVATORE, ALESSIO, Silvia Maria, F. C. Ljungqvist, M. Ghil
Other Authors: C. Taricco, S. Mancuso, F.C. Ljungqvist, S. Alessio
Format: Article in Journal/Newspaper
Language:English
Published: 2014
Subjects:
Online Access:http://hdl.handle.net/2318/157488
https://doi.org/10.1007/s00382-014-2331-1
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spelling ftunivtorino:oai:iris.unito.it:2318/157488 2023-10-29T02:36:45+01:00 Multispectral analysis of Northern Hemisphere temperature record over the last five millennia TARICCO, Carla MANCUSO, SALVATORE ALESSIO, Silvia Maria F. C. Ljungqvist M. Ghil C. Taricco S. Mancuso F.C. Ljungqvist S. Alessio M. Ghil 2014 http://hdl.handle.net/2318/157488 https://doi.org/10.1007/s00382-014-2331-1 eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000354712500005 firstpage:1 lastpage:22 numberofpages:22 journal:CLIMATE DYNAMICS http://hdl.handle.net/2318/157488 doi:10.1007/s00382-014-2331-1 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84929998602 info:eu-repo/semantics/closedAccess paleoclimate temperature proxy records info:eu-repo/semantics/article 2014 ftunivtorino https://doi.org/10.1007/s00382-014-2331-1 2023-10-03T22:22:06Z Aiming to describe spatio-temporal climate variability on decadal-to-centennial time scales and longer, we analyzed a data set of 26 proxy records extending back 1,000–5,000 years; all records chosen were calibrated to yield temperatures. The seven irregularly sampled series in the data set were interpolated to a regular grid by optimized methods and then two advanced spectral methods—namely singular-spectrum analysis (SSA) and the continuous wavelet transform—were applied to individual series to separate significant oscillations from the high noise background. This univariate analysis identified several common periods across many of the 26 proxy records: a millennial trend, as well as oscillations of about 100 and 200 years, and a broad peak in the 40–70-year band. To study common NH oscillations, we then applied Multichannel SSA. Temperature variations on time scales longer than 600 years appear in our analysis as a dominant trend component, which shows climate features consistent with the Medieval Warm Period and the Little Ice Age. Statistically significant NH-wide peaks appear at 330, 250 and 110 years, as well as in a broad 50–80-year band. Strong variability centers in several bands are located around the North Atlantic basin and are in phase opposition between Greenland and Western Europe. Article in Journal/Newspaper Greenland North Atlantic Università degli studi di Torino: AperTo (Archivio Istituzionale ad Accesso Aperto) Climate Dynamics 45 1-2 83 104
institution Open Polar
collection Università degli studi di Torino: AperTo (Archivio Istituzionale ad Accesso Aperto)
op_collection_id ftunivtorino
language English
topic paleoclimate
temperature proxy records
spellingShingle paleoclimate
temperature proxy records
TARICCO, Carla
MANCUSO, SALVATORE
ALESSIO, Silvia Maria
F. C. Ljungqvist
M. Ghil
Multispectral analysis of Northern Hemisphere temperature record over the last five millennia
topic_facet paleoclimate
temperature proxy records
description Aiming to describe spatio-temporal climate variability on decadal-to-centennial time scales and longer, we analyzed a data set of 26 proxy records extending back 1,000–5,000 years; all records chosen were calibrated to yield temperatures. The seven irregularly sampled series in the data set were interpolated to a regular grid by optimized methods and then two advanced spectral methods—namely singular-spectrum analysis (SSA) and the continuous wavelet transform—were applied to individual series to separate significant oscillations from the high noise background. This univariate analysis identified several common periods across many of the 26 proxy records: a millennial trend, as well as oscillations of about 100 and 200 years, and a broad peak in the 40–70-year band. To study common NH oscillations, we then applied Multichannel SSA. Temperature variations on time scales longer than 600 years appear in our analysis as a dominant trend component, which shows climate features consistent with the Medieval Warm Period and the Little Ice Age. Statistically significant NH-wide peaks appear at 330, 250 and 110 years, as well as in a broad 50–80-year band. Strong variability centers in several bands are located around the North Atlantic basin and are in phase opposition between Greenland and Western Europe.
author2 C. Taricco
S. Mancuso
F.C. Ljungqvist
S. Alessio
M. Ghil
format Article in Journal/Newspaper
author TARICCO, Carla
MANCUSO, SALVATORE
ALESSIO, Silvia Maria
F. C. Ljungqvist
M. Ghil
author_facet TARICCO, Carla
MANCUSO, SALVATORE
ALESSIO, Silvia Maria
F. C. Ljungqvist
M. Ghil
author_sort TARICCO, Carla
title Multispectral analysis of Northern Hemisphere temperature record over the last five millennia
title_short Multispectral analysis of Northern Hemisphere temperature record over the last five millennia
title_full Multispectral analysis of Northern Hemisphere temperature record over the last five millennia
title_fullStr Multispectral analysis of Northern Hemisphere temperature record over the last five millennia
title_full_unstemmed Multispectral analysis of Northern Hemisphere temperature record over the last five millennia
title_sort multispectral analysis of northern hemisphere temperature record over the last five millennia
publishDate 2014
url http://hdl.handle.net/2318/157488
https://doi.org/10.1007/s00382-014-2331-1
genre Greenland
North Atlantic
genre_facet Greenland
North Atlantic
op_relation info:eu-repo/semantics/altIdentifier/wos/WOS:000354712500005
firstpage:1
lastpage:22
numberofpages:22
journal:CLIMATE DYNAMICS
http://hdl.handle.net/2318/157488
doi:10.1007/s00382-014-2331-1
info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-84929998602
op_rights info:eu-repo/semantics/closedAccess
op_doi https://doi.org/10.1007/s00382-014-2331-1
container_title Climate Dynamics
container_volume 45
container_issue 1-2
container_start_page 83
op_container_end_page 104
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