110 years of temperature observations at Orcadas Antarctic Station: multidecadal variability
There is growing evidence of significant changes in components of the Antarctic climate system, an important issue given the influence Antarctica has on global climate. It is important to infer to what extent these regional changes could be attributed to human-induced processes and to what extent to...
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ftconicet:oai:ri.conicet.gov.ar:11336/44173 2023-10-09T21:44:51+02:00 110 years of temperature observations at Orcadas Antarctic Station: multidecadal variability Zitto, Miguel Eduardo Barrucand, Mariana Graciela Piotrkowski, Rosa Canziani, Pablo Osvaldo application/pdf http://hdl.handle.net/11336/44173 eng eng John Wiley & Sons Ltd info:eu-repo/semantics/altIdentifier/doi/10.1002/joc.4384 info:eu-repo/semantics/altIdentifier/url/https://rmets.onlinelibrary.wiley.com/doi/abs/10.1002/joc.4384 http://hdl.handle.net/11336/44173 Zitto, Miguel Eduardo; Barrucand, Mariana Graciela; Piotrkowski, Rosa; Canziani, Pablo Osvaldo; 110 years of temperature observations at Orcadas Antarctic Station: multidecadal variability; John Wiley & Sons Ltd; International Journal of Climatology; 36; 2; 6-2015; 809-823 0899-8418 1097-0088 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Antarctica Climate Change Surface Temperature Multidecadal Variability Wavelet Transform Temperature Trend https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1002/joc.4384 2023-09-24T19:18:32Z There is growing evidence of significant changes in components of the Antarctic climate system, an important issue given the influence Antarctica has on global climate. It is important to infer to what extent these regional changes could be attributed to human-induced processes and to what extent to natural variability. Standard methods, such as linear trend estimates or piecewise linear trends can be inadequate since they may result in erratic, non-systematic results, particularly if different scales of variability are present in each record and various records are to be compared. The Orcadas Antarctic Station (Agentina), with daily surface meteorological observations since April 1903, provides Antarctica´s longest observational record. This study analyzes the Orcadas seasonal surface temperature variability. Multidecadal variability and short term trends are studied to provide an improved assessment of climate evolution and necessary information for the determination of mechanisms driving regional/local change. A combined method using Wavelet Transform (WT), non-linear statistical model approaches and derivative of fits is developed. This methodology is also applied for validation and comparison to the Gomez ice core oxygen isotope record for the 1857-2006 and 1903-2006 time intervals. Significant quasi 50-year and quasi 20-year variability bands were obtained, both for the quarterly and seasonal Orcadas temperature records, with warming (cooling) periods detected between 1903-1912, 1927- 1961 and 1972-2004 (1912-1927 and 1962-1972). If seasons are considered, the only one with a fairly sustained warming is summer, where actual cooling is observed only at the beginning, prior to the early 1930s. Quasi 50-year variability was also detected in the Gomez record. Long periods are obtained in the model fits, longer than the time series, which varied with window length. Though not representing variability cycles, they could represent the best fit of the non-linear, non oscillating asymptotic stationary component of ... Article in Journal/Newspaper Antarc* Antarctic Antarctica ice core CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic The Antarctic Gomez ENVELOPE(-58.795,-58.795,-62.196,-62.196) Orcadas ENVELOPE(-44.717,-44.717,-60.750,-60.750) International Journal of Climatology 36 2 809 823 |
institution |
Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Antarctica Climate Change Surface Temperature Multidecadal Variability Wavelet Transform Temperature Trend https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
Antarctica Climate Change Surface Temperature Multidecadal Variability Wavelet Transform Temperature Trend https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Zitto, Miguel Eduardo Barrucand, Mariana Graciela Piotrkowski, Rosa Canziani, Pablo Osvaldo 110 years of temperature observations at Orcadas Antarctic Station: multidecadal variability |
topic_facet |
Antarctica Climate Change Surface Temperature Multidecadal Variability Wavelet Transform Temperature Trend https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
There is growing evidence of significant changes in components of the Antarctic climate system, an important issue given the influence Antarctica has on global climate. It is important to infer to what extent these regional changes could be attributed to human-induced processes and to what extent to natural variability. Standard methods, such as linear trend estimates or piecewise linear trends can be inadequate since they may result in erratic, non-systematic results, particularly if different scales of variability are present in each record and various records are to be compared. The Orcadas Antarctic Station (Agentina), with daily surface meteorological observations since April 1903, provides Antarctica´s longest observational record. This study analyzes the Orcadas seasonal surface temperature variability. Multidecadal variability and short term trends are studied to provide an improved assessment of climate evolution and necessary information for the determination of mechanisms driving regional/local change. A combined method using Wavelet Transform (WT), non-linear statistical model approaches and derivative of fits is developed. This methodology is also applied for validation and comparison to the Gomez ice core oxygen isotope record for the 1857-2006 and 1903-2006 time intervals. Significant quasi 50-year and quasi 20-year variability bands were obtained, both for the quarterly and seasonal Orcadas temperature records, with warming (cooling) periods detected between 1903-1912, 1927- 1961 and 1972-2004 (1912-1927 and 1962-1972). If seasons are considered, the only one with a fairly sustained warming is summer, where actual cooling is observed only at the beginning, prior to the early 1930s. Quasi 50-year variability was also detected in the Gomez record. Long periods are obtained in the model fits, longer than the time series, which varied with window length. Though not representing variability cycles, they could represent the best fit of the non-linear, non oscillating asymptotic stationary component of ... |
format |
Article in Journal/Newspaper |
author |
Zitto, Miguel Eduardo Barrucand, Mariana Graciela Piotrkowski, Rosa Canziani, Pablo Osvaldo |
author_facet |
Zitto, Miguel Eduardo Barrucand, Mariana Graciela Piotrkowski, Rosa Canziani, Pablo Osvaldo |
author_sort |
Zitto, Miguel Eduardo |
title |
110 years of temperature observations at Orcadas Antarctic Station: multidecadal variability |
title_short |
110 years of temperature observations at Orcadas Antarctic Station: multidecadal variability |
title_full |
110 years of temperature observations at Orcadas Antarctic Station: multidecadal variability |
title_fullStr |
110 years of temperature observations at Orcadas Antarctic Station: multidecadal variability |
title_full_unstemmed |
110 years of temperature observations at Orcadas Antarctic Station: multidecadal variability |
title_sort |
110 years of temperature observations at orcadas antarctic station: multidecadal variability |
publisher |
John Wiley & Sons Ltd |
url |
http://hdl.handle.net/11336/44173 |
long_lat |
ENVELOPE(-58.795,-58.795,-62.196,-62.196) ENVELOPE(-44.717,-44.717,-60.750,-60.750) |
geographic |
Antarctic The Antarctic Gomez Orcadas |
geographic_facet |
Antarctic The Antarctic Gomez Orcadas |
genre |
Antarc* Antarctic Antarctica ice core |
genre_facet |
Antarc* Antarctic Antarctica ice core |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1002/joc.4384 info:eu-repo/semantics/altIdentifier/url/https://rmets.onlinelibrary.wiley.com/doi/abs/10.1002/joc.4384 http://hdl.handle.net/11336/44173 Zitto, Miguel Eduardo; Barrucand, Mariana Graciela; Piotrkowski, Rosa; Canziani, Pablo Osvaldo; 110 years of temperature observations at Orcadas Antarctic Station: multidecadal variability; John Wiley & Sons Ltd; International Journal of Climatology; 36; 2; 6-2015; 809-823 0899-8418 1097-0088 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1002/joc.4384 |
container_title |
International Journal of Climatology |
container_volume |
36 |
container_issue |
2 |
container_start_page |
809 |
op_container_end_page |
823 |
_version_ |
1779313979292647424 |