Trends in the deep southern ocean (1958-2010): implications for antarctic bottom water properties and volume export
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da FURG (RI FURG) |
Texto Completo: | http://repositorio.furg.br/handle/1/5869 |
Resumo: | Regional formation of deep and bottom water masses around the Antarctic continentalshelf is one of the most important processes contributing to variability of the globalmeridional overturning circulation deep cell. Southern Ocean hydrographic data collectedduring the years 1958–2010 indicate that dense shelf waters cooled and freshened duringthat period. In the surrounding open ocean, Antarctic Bottom Water (AABW) warmed, withno evidence of salinity change. As a result of source-water property changes, AABWexported from the Southern Ocean to the deep world ocean became lighter over the periodanalyzed. The average rate of density change within the areas that experienced statisticallysignificant change was0.0019 kg m3yr1. For the last 20 years of the analysis, anegative AABW volume anomaly (relative to the half-century average, 1958–2010) wasindicated, possibly due to production of a lighter AABW variety or to changes in formationrates. Over the entire five decades, the upper isopycnal of the AABW layer deepened at arate of8.1 m yr1. Changes in fundamental hydrographic properties such as these canhave important implications for long-term global ocean circulation and climate. |
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Azeneu, Marina do Valle ChagasPereira, Rodrigo Kerr DuarteMata, Mauricio MagalhãesGarcia, Carlos Alberto Eiras2016-01-23T22:26:47Z2016-01-23T22:26:47Z2013AZANEU, Marina do Valle Chagas et al. Trends in the deep southern ocean (1958-2010): implications for antarctic bottom water properties and volume export. Journal of Geophysical Research: Oceans, v.118, n. 9, p.4213-4227, 2013. Disponível em: <https://www.researchgate.net/publication/248703256_Trends_in_the_deep_Southern_Ocean_1958-2010_Implications_for_Antarctic_Bottom_Water_properties_and_volume_export>. Acesso em 22 Jan 2016.2169-9291http://repositorio.furg.br/handle/1/586910.1002/jgrc.20303Regional formation of deep and bottom water masses around the Antarctic continentalshelf is one of the most important processes contributing to variability of the globalmeridional overturning circulation deep cell. Southern Ocean hydrographic data collectedduring the years 1958–2010 indicate that dense shelf waters cooled and freshened duringthat period. In the surrounding open ocean, Antarctic Bottom Water (AABW) warmed, withno evidence of salinity change. As a result of source-water property changes, AABWexported from the Southern Ocean to the deep world ocean became lighter over the periodanalyzed. The average rate of density change within the areas that experienced statisticallysignificant change was0.0019 kg m3yr1. For the last 20 years of the analysis, anegative AABW volume anomaly (relative to the half-century average, 1958–2010) wasindicated, possibly due to production of a lighter AABW variety or to changes in formationrates. Over the entire five decades, the upper isopycnal of the AABW layer deepened at arate of8.1 m yr1. Changes in fundamental hydrographic properties such as these canhave important implications for long-term global ocean circulation and climate.engTrends in the deep southern ocean (1958-2010): implications for antarctic bottom water properties and volume exportinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da FURG (RI FURG)instname:Universidade Federal do Rio Grande (FURG)instacron:FURGORIGINALAzaneu_etal_2013.pdfAzaneu_etal_2013.pdfapplication/pdf5020151https://repositorio.furg.br/bitstream/1/5869/1/Azaneu_etal_2013.pdf84d4e233a71d5e88eb4a201f7ac5239cMD51open accessLICENSElicense.txtlicense.txttext/plain; charset=utf-81748https://repositorio.furg.br/bitstream/1/5869/2/license.txt8a4605be74aa9ea9d79846c1fba20a33MD52open access1/58692019-12-03 16:43:59.069open accessoai:repositorio.furg.br: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Repositório InstitucionalPUBhttps://repositorio.furg.br/oai/request || http://200.19.254.174/oai/requestopendoar:2019-12-03T19:43:59Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG)false |
dc.title.pt_BR.fl_str_mv |
Trends in the deep southern ocean (1958-2010): implications for antarctic bottom water properties and volume export |
title |
Trends in the deep southern ocean (1958-2010): implications for antarctic bottom water properties and volume export |
spellingShingle |
Trends in the deep southern ocean (1958-2010): implications for antarctic bottom water properties and volume export Azeneu, Marina do Valle Chagas |
title_short |
Trends in the deep southern ocean (1958-2010): implications for antarctic bottom water properties and volume export |
title_full |
Trends in the deep southern ocean (1958-2010): implications for antarctic bottom water properties and volume export |
title_fullStr |
Trends in the deep southern ocean (1958-2010): implications for antarctic bottom water properties and volume export |
title_full_unstemmed |
Trends in the deep southern ocean (1958-2010): implications for antarctic bottom water properties and volume export |
title_sort |
Trends in the deep southern ocean (1958-2010): implications for antarctic bottom water properties and volume export |
author |
Azeneu, Marina do Valle Chagas |
author_facet |
Azeneu, Marina do Valle Chagas Pereira, Rodrigo Kerr Duarte Mata, Mauricio Magalhães Garcia, Carlos Alberto Eiras |
author_role |
author |
author2 |
Pereira, Rodrigo Kerr Duarte Mata, Mauricio Magalhães Garcia, Carlos Alberto Eiras |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Azeneu, Marina do Valle Chagas Pereira, Rodrigo Kerr Duarte Mata, Mauricio Magalhães Garcia, Carlos Alberto Eiras |
description |
Regional formation of deep and bottom water masses around the Antarctic continentalshelf is one of the most important processes contributing to variability of the globalmeridional overturning circulation deep cell. Southern Ocean hydrographic data collectedduring the years 1958–2010 indicate that dense shelf waters cooled and freshened duringthat period. In the surrounding open ocean, Antarctic Bottom Water (AABW) warmed, withno evidence of salinity change. As a result of source-water property changes, AABWexported from the Southern Ocean to the deep world ocean became lighter over the periodanalyzed. The average rate of density change within the areas that experienced statisticallysignificant change was0.0019 kg m3yr1. For the last 20 years of the analysis, anegative AABW volume anomaly (relative to the half-century average, 1958–2010) wasindicated, possibly due to production of a lighter AABW variety or to changes in formationrates. Over the entire five decades, the upper isopycnal of the AABW layer deepened at arate of8.1 m yr1. Changes in fundamental hydrographic properties such as these canhave important implications for long-term global ocean circulation and climate. |
publishDate |
2013 |
dc.date.issued.fl_str_mv |
2013 |
dc.date.accessioned.fl_str_mv |
2016-01-23T22:26:47Z |
dc.date.available.fl_str_mv |
2016-01-23T22:26:47Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.citation.fl_str_mv |
AZANEU, Marina do Valle Chagas et al. Trends in the deep southern ocean (1958-2010): implications for antarctic bottom water properties and volume export. Journal of Geophysical Research: Oceans, v.118, n. 9, p.4213-4227, 2013. Disponível em: <https://www.researchgate.net/publication/248703256_Trends_in_the_deep_Southern_Ocean_1958-2010_Implications_for_Antarctic_Bottom_Water_properties_and_volume_export>. Acesso em 22 Jan 2016. |
dc.identifier.uri.fl_str_mv |
http://repositorio.furg.br/handle/1/5869 |
dc.identifier.issn.none.fl_str_mv |
2169-9291 |
dc.identifier.doi.pt_BR.fl_str_mv |
10.1002/jgrc.20303 |
identifier_str_mv |
AZANEU, Marina do Valle Chagas et al. Trends in the deep southern ocean (1958-2010): implications for antarctic bottom water properties and volume export. Journal of Geophysical Research: Oceans, v.118, n. 9, p.4213-4227, 2013. Disponível em: <https://www.researchgate.net/publication/248703256_Trends_in_the_deep_Southern_Ocean_1958-2010_Implications_for_Antarctic_Bottom_Water_properties_and_volume_export>. Acesso em 22 Jan 2016. 2169-9291 10.1002/jgrc.20303 |
url |
http://repositorio.furg.br/handle/1/5869 |
dc.language.iso.fl_str_mv |
eng |
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eng |
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