Browsing Department of Earth Science by Title
Now showing items 555-574 of 858
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Pleistocene vertical carbon isotope and carbonate gradients in the South Atlantic sector of the Southern Ocean
(Peer reviewed; Journal article, 2003-01-10)We demonstrate that the carbon isotopic signal of mid-depth waters evolved differently from deep waters in the South Atlantic sector of the Southern Ocean during the Pleistocene. Deep sites (>3700 m) exhibit large ... -
Pliocene sea ice evolution in the Iceland and Labrador Sea – A biomarker approach
(Doctoral thesis, 2017-12-07)Sea ice plays a crucial role in the climate system. Although this is broadly acknowledged, the role of sea ice is not fully understood, especially during warmer periods such as the Pliocene (5.88–2.58 Million years ... -
The PMIP4 contribution to CMIP6 – Part 4: Scientific objectives and experimental design of the PMIP4-CMIP6 Last Glacial Maximum experiments and PMIP4 sensitivity experiments
(Peer reviewed; Journal article, 2017)The Last Glacial Maximum (LGM, 21 000 years ago) is one of the suite of paleoclimate simulations included in the current phase of the Coupled Model Intercomparison Project (CMIP6). It is an interval when insolation was ... -
Pockmarks i indre Aurlandsfjorden: Aktive eller inaktive lekkasjestrukturer Dannelse, alder og biogeokjemiske prosesser
(Master thesis, 2022-03-07)Ved bruk av høyoppløselige batymetris data er det i indre Aurlandsfjorden, Vest-Norge, kartlagt et område på c. 1.2 km2, på vanndyp mellom 40-72 m.u.h. hvor det er identifisert minst 18 pockmark strukturer. De har en ... -
Point-spread function convolution to simulate prestack depth migrated images: A validation study
(Journal article; Peer reviewed, 2021)Seismic migration commonly yields an incomplete reconstruction of the Earth model due to restricted survey aperture, band-limited frequency content and propagation effects. This affects both illumination and resolution of ... -
Polygonalforkastninger - karakteristikk og dannelsesmekanismer. En studie basert på tolking av seismiske data fra Norske-Barentshavsmarginen
(Master thesis, 2014-09-22)Polygonale forkastningssystemer (PFS) er bemerkelsesverdige strukturer som er identifisert i en rekke sedimentære bassenger over hele verden. Polygonalforkastninger er normalforkastninger med små sprang som hovedsakelig ... -
Possible Seismic Effects of Geochemical Processes of Injection of Carbon Dioxide in Carbonate Reservoirs.
(Master thesis, 2017-06-27)The seismic effect of geochemical reactions caused by rock-fluid interactions have been investigated throughout this thesis. Seismic attributes can provide valuable information about rock properties. As a result, rock ... -
The post-Caledonian history of the Røldal Shear Zone (SW Norway): an apatite fission track study
(Master thesis, 2015-04-27)The post-Caledonian tectonic history and landscape evolution of southwestern Norway is not very well understood and therefore the subject of an ongoing debate. The lack of onshore post-Devonian sediments makes the study ... -
Postglacial mass movements and depositional environments in a high-latitude fjord system – Hardangerfjorden, Western Norway
(Peer reviewed; Journal article, 2016-09)High resolution acoustic data and a 15.7 m long sediment core from the Hardangerfjorden system, western Norway, have been analyzed to increase our knowledge on depositional environments, submarine mass movement trigger ... -
Postglasiale sedimentære prosesser og avsetningsmiljø i Skagerrak
(Master thesis, 2015-11-30)Målet med denne studien har vært å kartlegge og studere avsetninger i Skagerrak og sørøstlige deler av Norskerenna for å gi et innblikk i den postglasiale utviklingen mot et moderne sedimentasjonsmønster. I tillegg er ... -
The potential of sedimentary ancient DNA for reconstructingpast sea ice evolution
(Peer reviewed; Journal article, 2019-06-24)Sea ice is a crucial component of the Arctic climate system, yet the tools to document the evolution of sea ice conditions onhistorical and geological time scales are few and have limitations. Such records are essential ... -
Potential secondary events caused by early Holocene paleoearthquakes in Fennoscandia – a climate-related review
(Journal article; Peer reviewed, 2021)During the last deglaciation of Fennoscandia, large earthquakes may have induced secondary effects on the high-latitude coastal regions and continental margins primarily from surface rock avalanches, large and small submarine ... -
Potential Use of Time-Lapse Surface Seismics for Monitoring Thawing of the Terrestrial Arctic
(Journal article; Peer reviewed, 2020)The terrestrial Arctic is warming rapidly, causing changes in the degree of freezing of the upper sediments, which the mechanical properties of unconsolidated sediments strongly depend upon. This study investigates the ... -
Pre-existing intra-basement shear zones on the development of non-colinear rift fault network, Utsira High – Heimdal Terrace, North Sea
(Peer reviewed; Journal article, 2020)Pre-existing intra-basement shear zones can induce mechanical and rheological heterogeneities that may influence rifting and the overall geometry of rift-related normal faults. However, the extent to which physical and ... -
Precessional Cyclicity of Seawater Pb Isotopes in the Late Miocene Mediterranean
(Peer reviewed; Journal article, 2019-12)Astronomical tuning in the Mediterranean region is primarily based on organically‐mediated proxies, such as cyclicity of organic rich layers or changes in foraminiferal assemblages. Both during and post deposition, organic ... -
Present day Jakobshavn Isbræ close to the Holocene minimum extent
(Journal article; Peer reviewed, 2020)Marine terminating glaciers evolve on millenial timescales in response to changes in oceanic and atmospheric conditions. However, the relative role of oceanic and atmospheric drivers remains uncertain. The evolution of ... -
Prestack inversion and multiattribute analysis for porosity, shale volume, and sand probability in the Havert Formation of the Goliat field, southwest Barents Sea
(Peer reviewed; Journal article, 2017-08)An integrated innovative multidisciplinary approach has been used to estimate effective porosity (PHIE), shale volume (Vsh), and sand probability from prestack angle gathers and petrophysical well logs within the Lower ... -
Probabilistic Tsunami Hazard Analysis (PTHA): multiple sources and global applications
(Peer reviewed; Journal article, 2017-12)Applying probabilistic methods to infrequent but devastating natural events is intrinsically challenging. For tsunami analyses, a suite of geophysical assessments should be in principle evaluated because of the different ... -
Probabilistic Tsunami Hazard and Risk Analysis: A Review of Research Gaps
(Journal article; Peer reviewed, 2021)Tsunamis are unpredictable and infrequent but potentially large impact natural disasters. To prepare, mitigate and prevent losses from tsunamis, probabilistic hazard and risk analysis methods have been developed and have ... -
Processes Prior and during the Early 18th Century Irish Famines—Weather Extremes and Migration
(Peer reviewed; Journal article, 2015-12-10)This paper advances the current debates on famine and famine history, with a focus on the first half of the 18th century in Ireland. Ireland was often hit by severe famines and two of them, specifically the famines of ...