Spatial fields of Antarctic sea-ice concentration anomalies for summer - Autumn and their relationship to Southern Hemisphere atmospheric circulation during the period 1979-2009

Autores
Barreira, Sandra; Compagnucci, Rosa Hilda
Año de publicación
2011
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Summer-autumn monthly sea-ice concentration anomaly (SICA) fields in Antarctica obtained from satellite data for the period 1979-2009 were analysed with Varimax-rotated T-mode principal component analysis (PCA). The first three PCA scores described the SICA spatial behaviour and explained 38.07% of the total variance. The related atmospheric circulation characteristics were analysed using 850 hPa height and surface air-temperature anomalies for the months clustered by the corresponding SICA composites, which were based on PCA loadings above a ±0.3 threshold. The principal characteristics of SICA can be seen between the Ross and Weddell Seas, areas that remained ice-covered during the analysis period. Elsewhere around Antarctica, small distinct characteristics occur mostly in embayments. The leading summer-autumn SICA pattern shows a structure with two centres of equal sign located one over the Weddell and the other over the Ross Sea-southwest Pacific Ocean sector and a centre of opposite sign over the Bellingshausen and Amundsen Seas. The second SICA pattern is represented by a dipóle over the Weddell Sea as a result of an increase (decrease) in sea-ice concentration in the northern sector (positive phase) and a decrease (increase) in the southern region, together with a positive (negative) centre over the Ross and Amundsen Seas. The latter pattern is characterized by equal-sign anomalies on both sides of the Antarctic Peninsula and opposite-sign centres all around Antarctica with the highest intensity over the Ross Sea.
Fil: Barreira, Sandra. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina
Fil: Compagnucci, Rosa Hilda. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias de la Atmósfera y los Océanos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria; Argentina
Materia
concentracion de hielo marino
verano-otoño
Antartida
Circulación atmosférica
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
Repositorio
CONICET Digital (CONICET)
Institución
Consejo Nacional de Investigaciones Científicas y Técnicas
OAI Identificador
oai:ri.conicet.gov.ar:11336/117818
Acceder
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network_name_str CONICET Digital (CONICET)
spelling Spatial fields of Antarctic sea-ice concentration anomalies for summer - Autumn and their relationship to Southern Hemisphere atmospheric circulation during the period 1979-2009Barreira, SandraCompagnucci, Rosa Hildaconcentracion de hielo marinoverano-otoñoAntartidaCirculación atmosféricahttps://purl.org/becyt/ford/1.5https://purl.org/becyt/ford/1Summer-autumn monthly sea-ice concentration anomaly (SICA) fields in Antarctica obtained from satellite data for the period 1979-2009 were analysed with Varimax-rotated T-mode principal component analysis (PCA). The first three PCA scores described the SICA spatial behaviour and explained 38.07% of the total variance. The related atmospheric circulation characteristics were analysed using 850 hPa height and surface air-temperature anomalies for the months clustered by the corresponding SICA composites, which were based on PCA loadings above a ±0.3 threshold. The principal characteristics of SICA can be seen between the Ross and Weddell Seas, areas that remained ice-covered during the analysis period. Elsewhere around Antarctica, small distinct characteristics occur mostly in embayments. The leading summer-autumn SICA pattern shows a structure with two centres of equal sign located one over the Weddell and the other over the Ross Sea-southwest Pacific Ocean sector and a centre of opposite sign over the Bellingshausen and Amundsen Seas. The second SICA pattern is represented by a dipóle over the Weddell Sea as a result of an increase (decrease) in sea-ice concentration in the northern sector (positive phase) and a decrease (increase) in the southern region, together with a positive (negative) centre over the Ross and Amundsen Seas. The latter pattern is characterized by equal-sign anomalies on both sides of the Antarctic Peninsula and opposite-sign centres all around Antarctica with the highest intensity over the Ross Sea.Fil: Barreira, Sandra. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; ArgentinaFil: Compagnucci, Rosa Hilda. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias de la Atmósfera y los Océanos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria; ArgentinaCambridge University Press2011-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/117818Barreira, Sandra; Compagnucci, Rosa Hilda; Spatial fields of Antarctic sea-ice concentration anomalies for summer - Autumn and their relationship to Southern Hemisphere atmospheric circulation during the period 1979-2009; Cambridge University Press; Annals Of Glaciology; 52; 57; 5-2011; 140-1500260-3055CONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/annals-of-glaciology/article/spatial-fields-of-antarctic-seaice-concentration-anomalies-for-summerautumn-and-their-relationship-to-southern-hemisphere-atmospheric-circulation-during-the-period-19792009/8B010487C03E8B76192A0AD9930FCA40info:eu-repo/semantics/altIdentifier/doi/10.3189/172756411795931741info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-nd/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-10-22T11:52:33Zoai:ri.conicet.gov.ar:11336/117818instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-10-22 11:52:33.48CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse
dc.title.none.fl_str_mv Spatial fields of Antarctic sea-ice concentration anomalies for summer - Autumn and their relationship to Southern Hemisphere atmospheric circulation during the period 1979-2009
title Spatial fields of Antarctic sea-ice concentration anomalies for summer - Autumn and their relationship to Southern Hemisphere atmospheric circulation during the period 1979-2009
spellingShingle Spatial fields of Antarctic sea-ice concentration anomalies for summer - Autumn and their relationship to Southern Hemisphere atmospheric circulation during the period 1979-2009
Barreira, Sandra
concentracion de hielo marino
verano-otoño
Antartida
Circulación atmosférica
title_short Spatial fields of Antarctic sea-ice concentration anomalies for summer - Autumn and their relationship to Southern Hemisphere atmospheric circulation during the period 1979-2009
title_full Spatial fields of Antarctic sea-ice concentration anomalies for summer - Autumn and their relationship to Southern Hemisphere atmospheric circulation during the period 1979-2009
title_fullStr Spatial fields of Antarctic sea-ice concentration anomalies for summer - Autumn and their relationship to Southern Hemisphere atmospheric circulation during the period 1979-2009
title_full_unstemmed Spatial fields of Antarctic sea-ice concentration anomalies for summer - Autumn and their relationship to Southern Hemisphere atmospheric circulation during the period 1979-2009
title_sort Spatial fields of Antarctic sea-ice concentration anomalies for summer - Autumn and their relationship to Southern Hemisphere atmospheric circulation during the period 1979-2009
dc.creator.none.fl_str_mv Barreira, Sandra
Compagnucci, Rosa Hilda
author Barreira, Sandra
author_facet Barreira, Sandra
Compagnucci, Rosa Hilda
author_role author
author2 Compagnucci, Rosa Hilda
author2_role author
dc.subject.none.fl_str_mv concentracion de hielo marino
verano-otoño
Antartida
Circulación atmosférica
topic concentracion de hielo marino
verano-otoño
Antartida
Circulación atmosférica
purl_subject.fl_str_mv https://purl.org/becyt/ford/1.5
https://purl.org/becyt/ford/1
dc.description.none.fl_txt_mv Summer-autumn monthly sea-ice concentration anomaly (SICA) fields in Antarctica obtained from satellite data for the period 1979-2009 were analysed with Varimax-rotated T-mode principal component analysis (PCA). The first three PCA scores described the SICA spatial behaviour and explained 38.07% of the total variance. The related atmospheric circulation characteristics were analysed using 850 hPa height and surface air-temperature anomalies for the months clustered by the corresponding SICA composites, which were based on PCA loadings above a ±0.3 threshold. The principal characteristics of SICA can be seen between the Ross and Weddell Seas, areas that remained ice-covered during the analysis period. Elsewhere around Antarctica, small distinct characteristics occur mostly in embayments. The leading summer-autumn SICA pattern shows a structure with two centres of equal sign located one over the Weddell and the other over the Ross Sea-southwest Pacific Ocean sector and a centre of opposite sign over the Bellingshausen and Amundsen Seas. The second SICA pattern is represented by a dipóle over the Weddell Sea as a result of an increase (decrease) in sea-ice concentration in the northern sector (positive phase) and a decrease (increase) in the southern region, together with a positive (negative) centre over the Ross and Amundsen Seas. The latter pattern is characterized by equal-sign anomalies on both sides of the Antarctic Peninsula and opposite-sign centres all around Antarctica with the highest intensity over the Ross Sea.
Fil: Barreira, Sandra. Ministerio de Defensa. Armada Argentina. Servicio de Hidrografía Naval; Argentina
Fil: Compagnucci, Rosa Hilda. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Ciencias de la Atmósfera y los Océanos; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria; Argentina
description Summer-autumn monthly sea-ice concentration anomaly (SICA) fields in Antarctica obtained from satellite data for the period 1979-2009 were analysed with Varimax-rotated T-mode principal component analysis (PCA). The first three PCA scores described the SICA spatial behaviour and explained 38.07% of the total variance. The related atmospheric circulation characteristics were analysed using 850 hPa height and surface air-temperature anomalies for the months clustered by the corresponding SICA composites, which were based on PCA loadings above a ±0.3 threshold. The principal characteristics of SICA can be seen between the Ross and Weddell Seas, areas that remained ice-covered during the analysis period. Elsewhere around Antarctica, small distinct characteristics occur mostly in embayments. The leading summer-autumn SICA pattern shows a structure with two centres of equal sign located one over the Weddell and the other over the Ross Sea-southwest Pacific Ocean sector and a centre of opposite sign over the Bellingshausen and Amundsen Seas. The second SICA pattern is represented by a dipóle over the Weddell Sea as a result of an increase (decrease) in sea-ice concentration in the northern sector (positive phase) and a decrease (increase) in the southern region, together with a positive (negative) centre over the Ross and Amundsen Seas. The latter pattern is characterized by equal-sign anomalies on both sides of the Antarctic Peninsula and opposite-sign centres all around Antarctica with the highest intensity over the Ross Sea.
publishDate 2011
dc.date.none.fl_str_mv 2011-05
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://hdl.handle.net/11336/117818
Barreira, Sandra; Compagnucci, Rosa Hilda; Spatial fields of Antarctic sea-ice concentration anomalies for summer - Autumn and their relationship to Southern Hemisphere atmospheric circulation during the period 1979-2009; Cambridge University Press; Annals Of Glaciology; 52; 57; 5-2011; 140-150
0260-3055
CONICET Digital
CONICET
url http://hdl.handle.net/11336/117818
identifier_str_mv Barreira, Sandra; Compagnucci, Rosa Hilda; Spatial fields of Antarctic sea-ice concentration anomalies for summer - Autumn and their relationship to Southern Hemisphere atmospheric circulation during the period 1979-2009; Cambridge University Press; Annals Of Glaciology; 52; 57; 5-2011; 140-150
0260-3055
CONICET Digital
CONICET
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/annals-of-glaciology/article/spatial-fields-of-antarctic-seaice-concentration-anomalies-for-summerautumn-and-their-relationship-to-southern-hemisphere-atmospheric-circulation-during-the-period-19792009/8B010487C03E8B76192A0AD9930FCA40
info:eu-repo/semantics/altIdentifier/doi/10.3189/172756411795931741
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-nd/2.5/ar/
dc.format.none.fl_str_mv application/pdf
application/pdf
dc.publisher.none.fl_str_mv Cambridge University Press
publisher.none.fl_str_mv Cambridge University Press
dc.source.none.fl_str_mv reponame:CONICET Digital (CONICET)
instname:Consejo Nacional de Investigaciones Científicas y Técnicas
reponame_str CONICET Digital (CONICET)
collection CONICET Digital (CONICET)
instname_str Consejo Nacional de Investigaciones Científicas y Técnicas
repository.name.fl_str_mv CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas
repository.mail.fl_str_mv dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar
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score 12.982451

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