dc.contributor.author | Steene, Rebekka Jastamin | |
dc.date.accessioned | 2015-03-02T11:00:18Z | |
dc.date.available | 2015-03-02T11:00:18Z | |
dc.date.copyright | 2014 | |
dc.date.issued | 2015-03-02 | |
dc.identifier.uri | http://hdl.handle.net/11250/278105 | |
dc.description.abstract | As global climate changes are becoming increasingly evident, increasing air temperatures,
melting glaciers, rising sea levels, and decreasing biodiversity is observed at increasing rates
worldwide. The Arctic sea ice cover has has become a key indicator of the ongoing global
climate change through its substantial decline in both extent and thickness.
In this study we show how the observed regression of the Northern Hemisphere sea ice is
distributed over different regions of the Arctic Ocean and adjacent seas. We further provide
an evaluation of to what extent the regions are re
ecting changes during summer or winter
seasons, exemplified by the months of September and March. We also relate the changes to
observed atmospheric and oceanographic conditions. Data from passive microwave satellite
measurements are used to investigate regional and seasonal time series of ice extent.
All regions except one show a decreasing trend throughout the data record. It is found that
six of twelve regions has seen an accelerated decline during the last decade. This is either
caused by an increasingly smaller summer minimum, or by a prolongation of the regional
summer season.
It is further found that summer melting is initiated by atmospheric heat in the areas where
the recession of ice extent most prominent. The process of freezing during winter is found
to be particularly sensitive to the oceanic temperatures in the regions receiving currents of
warm Atlantic Water. | nb_NO |
dc.language.iso | eng | nb_NO |
dc.publisher | Norwegian University of Life Sciences, Ås | |
dc.rights | Navngivelse 3.0 Norge | * |
dc.rights.uri | http://creativecommons.org/licenses/by/3.0/no/ | * |
dc.subject | Ice | nb_NO |
dc.subject | Climate | nb_NO |
dc.subject | Arctic | nb_NO |
dc.title | The changing Arctic Sea ice cover : regional and seasonal aspects | nb_NO |
dc.title.alternative | Det arktiske havisdekket i endring - betraktninger over ulike regioner og årstider | nb_NO |
dc.type | Master thesis | nb_NO |
dc.subject.nsi | VDP::Mathematics and natural science: 400::Geosciences: 450::Oceanography: 452 | nb_NO |
dc.source.pagenumber | 91 | nb_NO |
dc.description.localcode | M-MF | nb_NO |