Browsing Department of Earth Science by Title
Now showing items 1215-1234 of 1242
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Variability in ISOW vigor over the last 1300 years and its relationship to climate
(Master thesis, 2009-06-02)Resolving the scale and origins of recent low frequency (decadal-centennial) climate variations, such as the AMO, is crucial for predicting how natural variability and anthropogenic forcing will interact to affect future ... -
Variability of precipitation in complex terrain and the investigation of representativeness of a single point measurement for the Matre Hydro System, Western Norway.
(Master thesis, 2009-06-08)Orography is strongly affecting precipitation. Especially over complex terrain, the precipitation fields can show high spatial variability even over very small scales. In cooperation between the power company BKK ... -
Variations in Iceland-Scotland Overflow Water during the penultimate interglacial
(Master thesis, 2018-12)There is a growing body of evidence suggesting that the density and speed of the Nordic Seas overflows experienced significant changes on both centennial and multi-millennial time scales throughout the penultimate interglacial ... -
Variations of the Ice Shelf Water in the southern Weddell Sea, Antarctica
(Master thesis, 2011)Ice Shelf Water (ISW) characteristics are investigated using data from moored instruments in the southern Weddell Sea. Most attention is given to the temperature data, but additional current, salinity and oxygen data are ... -
Vertikal utbredelse av glasialt transportert materiale på Gaustatoppen
(Master thesis, 2015-09-03)Gaustatoppen (1883 m o.h.) er en ikonisk fjelltopp i Sør-Norge, der det tidligere er gjort få kvartærgeologiske undersøkelser. På bakgrunn av blokkhavet som dekker fjellmassivet og toppens høyde i forhold til omkringliggende ... -
Visual Techniques for Geological Fieldwork Using Mobile Devices
(Doctoral thesis, 2017-10-06)Visual techniques in general and 3D visualisation in particular have seen considerable adoption within the last 30 years in the geosciences and geology. Techniques such as volume visualisation, for analysing subsurface ... -
Visualizing Three-Dimensional Variations in The Mineral Distribution of Black Smoker Chimneys
(Master thesis, 2023-01-23) -
Volcanic activity and temporal evolution of ultraslow-spreading ridges
(Doctoral thesis, 2024-09-05)Det overordnede målet med denne studien har vært å øke vår forståelse av vulkansk aktivitet langs jordens ultrasakte sprederygger. Avhandlingen består av tre deler som sikter mot å: (I) Forstå den romlige og tidsmessige ... -
Volcanic evolution of an ultraslow-spreading ridge
(Journal article; Peer reviewed, 2023)Nearly 30% of ocean crust forms at mid-ocean ridges where the spreading rate is less than 20 mm per year. According to the seafloor spreading paradigm, oceanic crust forms along a narrow axial zone and is transported away ... -
The Volcanic Hazards of Jan Mayen Island (North-Atlantic)
(Journal article; Peer reviewed, 2022)Hazard assessment of remote volcanic islands provides many challenges compared to other volcanoes and volcanic fields. Here we present the first systematic volcanic hazard assessment of Jan Mayen Island, a remote island ... -
Volcanic rocks at the Møre Marginal High: geochemistry, petrogenesis and emplacement mechanisms
(Master thesis, 2017-06-13)The opening of the Norwegian-Greenland Sea at the Paleocene−Eocene transition was accompanied by extensive magmatic activity, giving rise to the North Atlantic Igneous Province. The magmatic activity is today manifested ... -
Volcanically hosted venting with indications of ultramafic influence at Aurora hydrothermal field on Gakkel Ridge
(Journal article; Peer reviewed, 2022)The Aurora hydrothermal system, Arctic Ocean, hosts active submarine venting within an extensive field of relict mineral deposits. Here we show the site is associated with a neovolcanic mound located within the Gakkel Ridge ... -
Volcaniclastic Dispersal During Submarine Lava Effusion: The 2012 Eruption of Havre Volcano, Kermadec Arc, New Zealand
(Journal article; Peer reviewed, 2020)Understanding clast dispersal from subaqueous volcanism is hampered by uncertainty in the source and extent of seafloor deposits. Extensive sampling in situ of seafloor deposits from the 2012 submarine eruption of Havre ... -
Vurdering og tentativ kvantifisering av stislitasje i Geirangerfjorden verdsarvområde
(Master thesis, 2022-06-01)Ferdsel i stiar fører til auka erosjon i lausmassane og slitasje på forvitringshuda til dei harde overflatene i stiane. Problemstillinga i denne oppgåva omhandlar tentativ kvantifisering av stislitasje i lausmassar og på ... -
Warm Middle Miocene Indian Ocean Bottom Water Temperatures: Comparison of Clumped Isotope and Mg/Ca‐Based Estimates
(Journal article; Peer reviewed, 2020)The middle Miocene is an important analogue for potential future warm climates. However, few independent deep ocean temperature records exist, though these are important for climate model validation and estimates of changes ... -
Was common Era glacier expansion in the Arctic Atlantic region triggered by unforced atmospheric cooling?
(Peer reviewed; Journal article, 2019-08-05)The timing and causes of Common Era (CE) glacier growth in the Arctic Atlantic region remain elusive. There is mounting evidence of advances that predate the Little Ice Age (1250–1850 CE); this challenges the view that ... -
Water Migration in the Subduction Mantle Wedge: A Two-Phase Flow Approach
(Journal article; Peer reviewed, 2019)Subduction zones are the main entry points of water into Earth's mantle and play an important role in the global water cycle. The progressive release of water by metamorphic dehydration induces important physical‐chemical ... -
Wavefield Migration Imaging of Moho Geometry and Upper Mantle Structure Beneath Southern New England
(Journal article; Peer reviewed, 2022)The crust and upper mantle beneath the New England Appalachians exhibit a large offset of the Moho across the boundary between Laurentia and accreted terranes and several dipping discontinuities, which reflect Paleozoic ... -
Weathering of deep-sea hydrothermal sulfide deposits. Stability of heavy metals and implications for future mining activities
(Master thesis, 2016-12-20)During future mining operations on seafloor massive sulfide deposits, sulfidic material will be reworked and relocated at the seafloor, exposing the material to oxic conditions. In an oxic environment sulfidic material ... -
The West African salt-bearing rifted margin—Regional structural variability and salt tectonics between Gabon and Namibe
(Journal article; Peer reviewed, 2023)Salt-bearing rifted margins comprise some of the most structurally complex and economically important sedimentary basin settings such as the South Atlantic and the Gulf of Mexico salt basins. They are also involved with ...