Gelo marinho antártico: tendências de 1978 a 2006
Sea ice plays an important role on Earth’s climate. Besides its high albedo, sea ice isolates ocean from atmosphere reducing the heat flux between them and is in part responsible for deep water formation through brine expulsion. However, these processes can be affected by the recent global temperatu...
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ftunivfurg:oai:repositorio.furg.br:1/1883 2023-11-12T04:07:05+01:00 Gelo marinho antártico: tendências de 1978 a 2006 Marson, Juliana Marini Mata, Mauricio Magalhães Garcia, Carlos Alberto Eiras 2009 application/pdf http://repositorio.furg.br/handle/1/1883 por por MARSON, Juliana Marini; MATA, Mauricio Magalhães; GARCIA, Carlos Alberto Eiras. Gelo marinho antártico: tendências de 1978 a 2006. In: 14º Simpósio Brasileiro de Sensoriamento Remoto, 14, Natal, 2009 . Anais Eletrônicos. Natal, 2009. Disponível em:<http://marte.dpi.inpe.br/col/dpi.inpe.br/sbsr@80/2008/11.17.13.54/doc/6563-6570.pdf>. Acesso em: 13 mar. 2012. http://repositorio.furg.br/handle/1/1883 open access SMMR SSMI Climate change Mudanças climáticas conferenceObject 2009 ftunivfurg 2023-10-24T21:01:28Z Sea ice plays an important role on Earth’s climate. Besides its high albedo, sea ice isolates ocean from atmosphere reducing the heat flux between them and is in part responsible for deep water formation through brine expulsion. However, these processes can be affected by the recent global temperature increase. The objectives of this work are to calculate the long term trends of sea ice concentration and extension and try to make the relation, even preliminarily, between these trends and climate change. For this, analyses such as linear regression and correlation were made with SMMR and SSMI data for the 1978-2006 period. The results show that almost all Antarctica’s regions have a positive trend except the Bellingshausen/Amundsen Seas. The reasons for this are not well established, but processes like increase of air and water temperature, El Niño events, and positive trends for SAM index are pointed as being critical factors influencing this area. For the whole Southern Ocean, the trend was significant and positive, in opposition to the Arctic’s sea ice extension trend. To find the possible causes for these trends, we need to take into account the several processes that happen in these areas and their behavior over time and not consider just one factor to be responsible. We have to remember that the time series is relatively short and that these trends can just be the ascending part of a major cycle. Conference Object Antarc* Sea ice Southern Ocean RI FURG (Repositório da Universidade Federal do Rio Grande) Southern Ocean |
institution |
Open Polar |
collection |
RI FURG (Repositório da Universidade Federal do Rio Grande) |
op_collection_id |
ftunivfurg |
language |
Portuguese |
topic |
SMMR SSMI Climate change Mudanças climáticas |
spellingShingle |
SMMR SSMI Climate change Mudanças climáticas Marson, Juliana Marini Mata, Mauricio Magalhães Garcia, Carlos Alberto Eiras Gelo marinho antártico: tendências de 1978 a 2006 |
topic_facet |
SMMR SSMI Climate change Mudanças climáticas |
description |
Sea ice plays an important role on Earth’s climate. Besides its high albedo, sea ice isolates ocean from atmosphere reducing the heat flux between them and is in part responsible for deep water formation through brine expulsion. However, these processes can be affected by the recent global temperature increase. The objectives of this work are to calculate the long term trends of sea ice concentration and extension and try to make the relation, even preliminarily, between these trends and climate change. For this, analyses such as linear regression and correlation were made with SMMR and SSMI data for the 1978-2006 period. The results show that almost all Antarctica’s regions have a positive trend except the Bellingshausen/Amundsen Seas. The reasons for this are not well established, but processes like increase of air and water temperature, El Niño events, and positive trends for SAM index are pointed as being critical factors influencing this area. For the whole Southern Ocean, the trend was significant and positive, in opposition to the Arctic’s sea ice extension trend. To find the possible causes for these trends, we need to take into account the several processes that happen in these areas and their behavior over time and not consider just one factor to be responsible. We have to remember that the time series is relatively short and that these trends can just be the ascending part of a major cycle. |
format |
Conference Object |
author |
Marson, Juliana Marini Mata, Mauricio Magalhães Garcia, Carlos Alberto Eiras |
author_facet |
Marson, Juliana Marini Mata, Mauricio Magalhães Garcia, Carlos Alberto Eiras |
author_sort |
Marson, Juliana Marini |
title |
Gelo marinho antártico: tendências de 1978 a 2006 |
title_short |
Gelo marinho antártico: tendências de 1978 a 2006 |
title_full |
Gelo marinho antártico: tendências de 1978 a 2006 |
title_fullStr |
Gelo marinho antártico: tendências de 1978 a 2006 |
title_full_unstemmed |
Gelo marinho antártico: tendências de 1978 a 2006 |
title_sort |
gelo marinho antártico: tendências de 1978 a 2006 |
publishDate |
2009 |
url |
http://repositorio.furg.br/handle/1/1883 |
geographic |
Southern Ocean |
geographic_facet |
Southern Ocean |
genre |
Antarc* Sea ice Southern Ocean |
genre_facet |
Antarc* Sea ice Southern Ocean |
op_relation |
MARSON, Juliana Marini; MATA, Mauricio Magalhães; GARCIA, Carlos Alberto Eiras. Gelo marinho antártico: tendências de 1978 a 2006. In: 14º Simpósio Brasileiro de Sensoriamento Remoto, 14, Natal, 2009 . Anais Eletrônicos. Natal, 2009. Disponível em:<http://marte.dpi.inpe.br/col/dpi.inpe.br/sbsr@80/2008/11.17.13.54/doc/6563-6570.pdf>. Acesso em: 13 mar. 2012. http://repositorio.furg.br/handle/1/1883 |
op_rights |
open access |
_version_ |
1782327919398354944 |