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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ftunibueairesbd:paper:paper_08998418_v36_n2_p809_Zitto 2023-05-15T13:51:25+02:00 110 years of temperature observations at Orcadas Antarctic Station: Multidecadal variability Zitto, Miguel Eduardo Barrucand, Mariana Graciela Piotrkowski, Rosa Canziani, Pablo Osvaldo 2016 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08998418_v36_n2_p809_Zitto https://hdl.handle.net/20.500.12110/paper_08998418_v36_n2_p809_Zitto unknown https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08998418_v36_n2_p809_Zitto http://hdl.handle.net/20.500.12110/paper_08998418_v36_n2_p809_Zitto Antarctica Climate change Multidecadal variability Surface temperature Temperature trend Wavelet transform Atmospheric temperature Isotopes Mathematical transformations Piecewise linear techniques Surface properties Wavelet transforms Meteorological observation Oxygen isotope records Seasonal surface temperature Surface temperatures Temperature observations Temperature trends cooling decadal variation global climate regional climate Argentina 2016 ftunibueairesbd https://doi.org/20.500.12110/paper_08998418_v36_n2_p809_Zitto 2023-02-16T02:18:48Z 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 because 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 (Argentina), with daily surface meteorological observations since April 1903, provides Antarctica's longest observational record. This study analyses 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. Although not representing variability cycles, they could represent the best fit of the non-linear, non oscillating asymptotic stationary component ... Other/Unknown Material Antarc* Antarctic Antarctica ice core Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) Antarctic Argentina Gomez ENVELOPE(-58.795,-58.795,-62.196,-62.196) Orcadas ENVELOPE(-44.717,-44.717,-60.750,-60.750) The Antarctic |
institution |
Open Polar |
collection |
Biblioteca Digital FCEN-UBA (Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires) |
op_collection_id |
ftunibueairesbd |
language |
unknown |
topic |
Antarctica Climate change Multidecadal variability Surface temperature Temperature trend Wavelet transform Atmospheric temperature Isotopes Mathematical transformations Piecewise linear techniques Surface properties Wavelet transforms Meteorological observation Oxygen isotope records Seasonal surface temperature Surface temperatures Temperature observations Temperature trends cooling decadal variation global climate regional climate Argentina |
spellingShingle |
Antarctica Climate change Multidecadal variability Surface temperature Temperature trend Wavelet transform Atmospheric temperature Isotopes Mathematical transformations Piecewise linear techniques Surface properties Wavelet transforms Meteorological observation Oxygen isotope records Seasonal surface temperature Surface temperatures Temperature observations Temperature trends cooling decadal variation global climate regional climate Argentina 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 Multidecadal variability Surface temperature Temperature trend Wavelet transform Atmospheric temperature Isotopes Mathematical transformations Piecewise linear techniques Surface properties Wavelet transforms Meteorological observation Oxygen isotope records Seasonal surface temperature Surface temperatures Temperature observations Temperature trends cooling decadal variation global climate regional climate Argentina |
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 because 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 (Argentina), with daily surface meteorological observations since April 1903, provides Antarctica's longest observational record. This study analyses 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. Although not representing variability cycles, they could represent the best fit of the non-linear, non oscillating asymptotic stationary component ... |
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 |
publishDate |
2016 |
url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08998418_v36_n2_p809_Zitto https://hdl.handle.net/20.500.12110/paper_08998418_v36_n2_p809_Zitto |
long_lat |
ENVELOPE(-58.795,-58.795,-62.196,-62.196) ENVELOPE(-44.717,-44.717,-60.750,-60.750) |
geographic |
Antarctic Argentina Gomez Orcadas The Antarctic |
geographic_facet |
Antarctic Argentina Gomez Orcadas The Antarctic |
genre |
Antarc* Antarctic Antarctica ice core |
genre_facet |
Antarc* Antarctic Antarctica ice core |
op_relation |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_08998418_v36_n2_p809_Zitto http://hdl.handle.net/20.500.12110/paper_08998418_v36_n2_p809_Zitto |
op_doi |
https://doi.org/20.500.12110/paper_08998418_v36_n2_p809_Zitto |
_version_ |
1766255279550234624 |