Blar i Department of Earth Science på tittel
Viser treff 10-29 av 861
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A detailed field and geochemical investigation of the volcanic sequence in the Grimelid-area: The Solund-Stavfjord Ophiolite Complex
(Master thesis, 2021-12-30)This master thesis focuses on the volcanic sequence of the Solund-Stavfjord Ophiolite Complex (SSOC) in Grimelia, in order to provide more detailed information and a better understanding of the development. The SSOC (443 ... -
A detailed field and geochemical investigation of the volcanic sequence in the Våganes-area: The Solund-Stavfjord Ophiolite Complex
(Master thesis, 2021-06-01)The Solund-Stavfjord Ophiolite Complex (SSOC) is located within the western Norwegian Caledonides and represents a remnant of the youngest phase of oceanic crust formation, dated to Late Ordovician (443 Ma). Detailed field ... -
Abiotic synthesis of methane and organic compounds in Earth’s lithosphere
(Journal article; Peer reviewed, 2020)Accumulation of molecular hydrogen in geologic systems can create conditions energetically favorable to transform inorganic carbon into methane and other organic compounds. Although hydrocarbons with a potentially abiotic ... -
Abrupt changes in sea ice and dynamics of Dansgaard-Oeschger events
(Doctoral thesis, 2017-12-01)Changes in sea ice are proposed as an important component in Dansgaard-Oeschger events; the abrupt climate change events that occurred repeatedly during the last ice age. Paleoclimatic reconstructions suggest an expansion ... -
Abrupt high-latitude climate events and decoupled seasonal trends during the Eemian
(Peer reviewed; Journal article, 2018-07-20)The Eemian (the Last Interglacial; ca. 129–116 thousand years ago) presents a testbed for assessing environmental responses and climate feedbacks under warmer-than-present boundary conditions. However, climate syntheses ... -
Accretionary history of Lower Ordovician island arc complexes on Bømlo: evidence from detrital zircon dating and geochemical data
(Master thesis, 2017-06-13)The provenance studies of sedimentary sequences associated with island arc complexes on Bømlo within the ophiolitic terrain of SW Norway has demonstrated that the provenance signature of these sedimentary rocks changed ... -
Acoustic Propagation Underneath the Arctic Sea-ice
(Doctoral thesis, 2018-10-04)The main objective of this project is to study the effect of sea-ice on underwater acoustic wave propagation. Three main parameters define how acoustic waves react to the presence of seaice: (i) the roughness of the underside ... -
Acoustic waveform inversion for ocean turbulence
(Peer reviewed; Journal article, 2017)The seismic oceanography method is based on extracting and stacking the low-frequency acoustic energy scattered by the ocean heterogeneity. However, a good understanding on how this acoustic wavefield is affected by physical ... -
Adjoint Modeling and Observing System Design in the Subpolar North Atlantic
(Doctoral thesis, 2019-08-30)The near-surface ocean currents of the subpolar North Atlantic transport large amounts of heat from the subtropics to higher latitudes, affecting Arctic sea ice extent, the melting of the Greenland Ice Sheet, and the climate ... -
Akustiske bølger i periodiske medier
(Master thesis, 2003) -
Alps to Apennines zircon roller coaster along the Adria microplate margin
(Peer reviewed; Journal article, 2018-02-09)We have traced the particle path of high-pressure metasedimentary rocks on Elba Island, Northern Apennines, with the help of a U-Pb-Hf detrital zircon study. One quarter of the analysed zircons are surprisingly young, ... -
Alps to Apennines zircon roller coaster along the Adria microplate margin
(Peer reviewed; Journal article, 2018-02-09)We have traced the particle path of high-pressure metasedimentary rocks on Elba Island, Northern Apennines, with the help of a U-Pb-Hf detrital zircon study. One quarter of the analysed zircons are surprisingly young, ... -
Ambient noise levels and detection threshold in Norway
(Peer reviewed; Journal article, 2016-07)Ambient seismic noise is caused by a number of sources in specific frequency bands. The quantification of ambient noise makes it possible to evaluate station and network performance. We evaluate noise levels in Norway from ... -
Ambient noise levels, QLg wave tomography and earthquake source parameters in Norway
(Doctoral thesis, 2019-04-05)Norway is part of an intraplate environment and therefore experiences low to intermediate seismicity. This seismicity is a response to the stress eld in the lithosphere, which is mainly in uenced by ridge push from the ... -
Ammonia-oxidizing archaea have similar power requirements in diverse marine oxic sediments
(Journal article; Peer reviewed, 2021)Energy/power availability is regarded as one of the ultimate controlling factors of microbial abundance in the deep biosphere, where fewer cells are found in habitats of lower energy availability. A critical assumption ... -
Analyse av seismiske data innenfor Gullfakslisensen - implikasjoner for tolkningen av topp NER
(Master thesis, 2003) -
Analytical and numerical studies of fluid reservoirs and fracture development in heterogeneous rocks
(Doctoral thesis, 2009-06-29) -
Anatomy and allostratigraphy of deep-marine Mount Messenger Formation (Miocene), eastern-margin Taranaki Basin, New Zealand
(Master thesis, 2003)Purpose of study: Sedimentological description of outcropping deep-water clastics within Mount Messenger Formation. Study area: North-Taranaki coastal region, North Island, New Zealand. Methodology: Mapping on foot and ... -
Anisotropic Properties of a Mid-Lithospheric Discontinuity in eastern North America
(Master thesis, 2017-06-23)During the last few years the occurrence of a mid-lithospheric discontinuity (MLD) has been observed in lithospheric studies of cratons. Studies using receiver functions have focused mainly on extracting high resolution ... -
Anthropogenic and environmental drivers of vegetation change in southeastern Norway during the Holocene
(Journal article; Peer reviewed, 2021)Uncovering anthropogenic and environmental drivers behind past biological change requires integrated analyses of long-term records from a diversity of disciplines. We applied an interdisciplinary approach exploring effects ...