Interannual variability and future changes of the Southern Ocean sea ice cover

The interannual variability of the sea ice in the Southern Ocean and its evolution projected for the end of the 21st century are investigated using observations and different types of models. First of all, none of the known atmospheric modes of variability are able to explain much of the total sea i...

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Main Author:	Lefebvre, Wouter
Format:	Others
Language:	en
Published:	Universite catholique de Louvain 2007
Subjects:	Sea ice Southern Ocean
Online Access:	http://edoc.bib.ucl.ac.be:81/ETD-db/collection/available/BelnUcetd-10302007-092927/

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spelling	ndltd-BICfB-oai-ucl.ac.be-ETDUCL-BelnUcetd-10302007-0929272013-01-07T15:42:05Z Interannual variability and future changes of the Southern Ocean sea ice cover Lefebvre, Wouter Sea ice Southern Ocean The interannual variability of the sea ice in the Southern Ocean and its evolution projected for the end of the 21st century are investigated using observations and different types of models. First of all, none of the known atmospheric modes of variability are able to explain much of the total sea ice extent variability in the Southern Ocean. However, they have large influences on the local and regional scales. In particular, the response of the sea ice to the Southern Annular Mode is characterized by a dipole between the Ross Sea and the region around the Antarctic Peninsula caused by a low pressure anomaly in the Amundsen Sea in high SAM-index years. Secondly, the sea ice extent in the different regions seems to be mostly uncorrelated, showing that the total sea ice cover cannot be seen as a single entity, but merely as a combination of regional covers. Finally, it is shown why the projected distribution of sea ice is not a simple extrapolation of the current sea ice trends. The mechanisms responsible for the regional variability of the future sea-ice extents are discussed. Universite catholique de Louvain 2007-11-16 text application/pdf http://edoc.bib.ucl.ac.be:81/ETD-db/collection/available/BelnUcetd-10302007-092927/ http://edoc.bib.ucl.ac.be:81/ETD-db/collection/available/BelnUcetd-10302007-092927/ en unrestricted J'accepte que le texte de la thèse (ci-après l'oeuvre), sous réserve des parties couvertes par la confidentialité, soit publié dans le recueil électronique des thèses UCL. A cette fin, je donne licence à l'UCL : - le droit de fixer et de reproduire l'oeuvre sur support électronique : logiciel ETD/db - le droit de communiquer l'oeuvre au public Cette licence, gratuite et non exclusive, est valable pour toute la durée de la propriété littéraire et artistique, y compris ses éventuelles prolongations, et pour le monde entier. Je conserve tous les autres droits pour la reproduction et la communication de la thèse, ainsi que le droit de l'utiliser dans de futurs travaux. Je certifie avoir obtenu, conformément à la législation sur le droit d'auteur et aux exigences du droit à l'image, toutes les autorisations nécessaires à la reproduction dans ma thèse d'images, de textes, et/ou de toute oeuvre protégés par le droit d'auteur, et avoir obtenu les autorisations nécessaires à leur communication à des tiers. Au cas où un tiers est titulaire d'un droit de propriété intellectuelle sur tout ou partie de ma thèse, je certifie avoir obtenu son autorisation écrite pour l'exercice des droits mentionnés ci-dessus.
collection	NDLTD
language	en
format	Others
sources	NDLTD
topic	Sea ice Southern Ocean
spellingShingle	Sea ice Southern Ocean Lefebvre, Wouter Interannual variability and future changes of the Southern Ocean sea ice cover
description	The interannual variability of the sea ice in the Southern Ocean and its evolution projected for the end of the 21st century are investigated using observations and different types of models. First of all, none of the known atmospheric modes of variability are able to explain much of the total sea ice extent variability in the Southern Ocean. However, they have large influences on the local and regional scales. In particular, the response of the sea ice to the Southern Annular Mode is characterized by a dipole between the Ross Sea and the region around the Antarctic Peninsula caused by a low pressure anomaly in the Amundsen Sea in high SAM-index years. Secondly, the sea ice extent in the different regions seems to be mostly uncorrelated, showing that the total sea ice cover cannot be seen as a single entity, but merely as a combination of regional covers. Finally, it is shown why the projected distribution of sea ice is not a simple extrapolation of the current sea ice trends. The mechanisms responsible for the regional variability of the future sea-ice extents are discussed.
author	Lefebvre, Wouter
author_facet	Lefebvre, Wouter
author_sort	Lefebvre, Wouter
title	Interannual variability and future changes of the Southern Ocean sea ice cover
title_short	Interannual variability and future changes of the Southern Ocean sea ice cover
title_full	Interannual variability and future changes of the Southern Ocean sea ice cover
title_fullStr	Interannual variability and future changes of the Southern Ocean sea ice cover
title_full_unstemmed	Interannual variability and future changes of the Southern Ocean sea ice cover
title_sort	interannual variability and future changes of the southern ocean sea ice cover
publisher	Universite catholique de Louvain
publishDate	2007
url	http://edoc.bib.ucl.ac.be:81/ETD-db/collection/available/BelnUcetd-10302007-092927/
work_keys_str_mv	AT lefebvrewouter interannualvariabilityandfuturechangesofthesouthernoceanseaicecover
_version_	1716393745085104128

Interannual variability and future changes of the Southern Ocean sea ice cover

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