110 years of temperature observations at Orcadas Antarctic Station: Multidecadal variability

Mostrar todas las versiones(2)

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...

Descripción completa

Guardado en:
Detalles Bibliográficos
Autores principales: Zitto, M.E., Barrucand, M.G., Piotrkowski, R., Canziani, P.O.
Formato: JOUR
Materias:
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
climate change
cooling
decadal variation
global climate
regional climate
surface temperature
Argentina
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_08998418_v36_n2_p809_Zitto
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_08998418_v36_n2_p809_Zitto
record_format dspace
spelling todo:paper_08998418_v36_n2_p809_Zitto2023-10-03T15:44:24Z 110 years of temperature observations at Orcadas Antarctic Station: Multidecadal variability Zitto, M.E. Barrucand, M.G. Piotrkowski, R. Canziani, P.O. Antarctica Climate change Multidecadal variability Surface temperature Temperature trend Wavelet transform Atmospheric temperature Isotopes Mathematical transformations Piecewise linear techniques Surface properties Wavelet transforms Antarctica Meteorological observation Multidecadal variability Oxygen isotope records Seasonal surface temperature Surface temperatures Temperature observations Temperature trends Climate change climate change cooling decadal variation global climate regional climate surface temperature Argentina 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 of the series, i.e. a non-linear trend. © 2016 Royal Meteorological Society. Fil:Zitto, M.E. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Barrucand, M.G. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Piotrkowski, R. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. Fil:Canziani, P.O. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales; Argentina. JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_08998418_v36_n2_p809_Zitto
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Antarctica
Climate change
Multidecadal variability
Surface temperature
Temperature trend
Wavelet transform
Atmospheric temperature
Isotopes
Mathematical transformations
Piecewise linear techniques
Surface properties
Wavelet transforms
Antarctica
Meteorological observation
Multidecadal variability
Oxygen isotope records
Seasonal surface temperature
Surface temperatures
Temperature observations
Temperature trends
Climate change
climate change
cooling
decadal variation
global climate
regional climate
surface temperature
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
Antarctica
Meteorological observation
Multidecadal variability
Oxygen isotope records
Seasonal surface temperature
Surface temperatures
Temperature observations
Temperature trends
Climate change
climate change
cooling
decadal variation
global climate
regional climate
surface temperature
Argentina
Zitto, M.E.
Barrucand, M.G.
Piotrkowski, R.
Canziani, P.O.
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
Antarctica
Meteorological observation
Multidecadal variability
Oxygen isotope records
Seasonal surface temperature
Surface temperatures
Temperature observations
Temperature trends
Climate change
climate change
cooling
decadal variation
global climate
regional climate
surface temperature
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 of the series, i.e. a non-linear trend. © 2016 Royal Meteorological Society.
format JOUR
author Zitto, M.E.
Barrucand, M.G.
Piotrkowski, R.
Canziani, P.O.
author_facet Zitto, M.E.
Barrucand, M.G.
Piotrkowski, R.
Canziani, P.O.
author_sort Zitto, M.E.
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
url http://hdl.handle.net/20.500.12110/paper_08998418_v36_n2_p809_Zitto
work_keys_str_mv AT zittome 110yearsoftemperatureobservationsatorcadasantarcticstationmultidecadalvariability
AT barrucandmg 110yearsoftemperatureobservationsatorcadasantarcticstationmultidecadalvariability
AT piotrkowskir 110yearsoftemperatureobservationsatorcadasantarcticstationmultidecadalvariability
AT canzianipo 110yearsoftemperatureobservationsatorcadasantarcticstationmultidecadalvariability
_version_ 1807318542536671232

Ejemplares similares