Browsing Department of Earth Science by Title
Now showing items 414-433 of 1103
-
Hydrography in the Nordic Seas During Dansgaard-Oeschger Events 8-5
(Doctoral thesis, 2019-06-14)The modern rapidity of Arctic sea ice loss and rise in Arctic air and ocean temperatures is pushing research to understand mechanisms for abrupt climate fluctuations. Resolving the mechanisms of past abrupt changes is a ... -
Hydrothermal activity fuels microbial sulfate reduction in deep and distal marine settings along the Arctic Mid Ocean Ridges
(Journal article; Peer reviewed, 2023)Microbial sulfate reduction is generally limited in the deep sea compared to shallower marine environments, but cold seeps and hydrothermal systems are considered an exception. Here, we report sulfate reduction rates and ... -
Hydrothermal circulation and oil migration at the root of the heterogeneous micro-structure of carbonaceous material in the 2.0 Ga Zaonega Formation, Onega Basin, Russia
(Journal article; Peer reviewed, 2020)Organic-rich rocks of the 2.0 Ga Zaonega Formation, Karelia, Russia, have been studied extensively to gain understanding of the global carbon cycle and reconstruction of paleo-environments, directly after the Great Oxidation ... -
Hydrothermal fluid flow triggered by an earthquake in Iceland
(Journal article; Peer reviewed, 2022)Microearthquake hypocenters were analyzed in the Krýsuvík geothermal area in SW-Iceland with data taken from two consecutive passive seismic surveys, 2005 and 2009. Five years prior to the 2005 survey, this area was struck ... -
Høyoppløselig rekonstruksjon av brefluktuasjoner på Fastdalstindbreen gjennom holosen. En studie basert på kvartærgeologisk kartlegging og analyse av innsjøsedimenter fra Elvejordsvatnet, Lyngen, Nord-Norge
(Master thesis, 2012-06-01)Fastdalstindbreen is a ~0, 16 km2 lager cirque glacier below the mountain Fastdalstind in Lyngen, Northern Norway. Cirque glaciers can be sensitive indicators of change in temperature, precipitation or wind direction. ... -
Ice Motion Across Deep Fjords
(Master thesis, 2024-06-03)The behaviour of ice crossing deep subglacial valleys has not been studied in detail, and this has important consequences for ice sheet modelling. In Western Norway striation markings left by the Scandinavian Ice Sheet ... -
Ice sheets, oceanic circulation & sea surface conditions: the NW European margin during the last 35,000 years
(Doctoral thesis, 2018-04-20)The north-western European continental margin provides a key area for detailed investigations of changes within the inflow of Atlantic warm surface currents, fluctuations in continental ice sheets and the corresponding ... -
Ice Thickness and Bed Elevation of the Northern and Southern Patagonian Icefields
(Peer reviewed; Journal article, 2019)The Northern and Southern Patagonian Icefields are the largest ice masses in the Southern Hemisphere outside Antarctica, but their ice volume and bed topography are poorly known. Here, we combine airborne gravity data ... -
Ice-dammed lakes and deglaciation history of the Scandinavian Ice Sheet in central Jämtland, Sweden
(Journal article; Peer reviewed, 2023)Extensive glacial lakes dammed in the Scandinavian Mountains during the retreat of the last Scandinavian Ice Sheet were first hypothesised over a century ago. Here, using high-resolution LiDAR, we report >4500 relict ... -
Ice-flow patterns and precise timing of ice sheet retreat across a dissected fjord landscape in western Norway
(Peer reviewed; Journal article, 2019-06)We reconstruct patterns of ice flow and retreat of the southwestern Scandinavian Ice Sheet, from 2900 field observations of glacial striae and elevation measurements of 60 ice-marginal-deltas from a high-resolution LiDAR ... -
Ice-sheet dynamics and glacial development of the Norwegian continental margin during the last 3 million years
(Doctoral thesis, 2007-06-29)This thesis is mainly about the dynamics of the palaeo-ice sheets that covered Scandinavia, Barents Sea and Svalbard during the last glaciation. Morphological interpretation of regional and detailed bathymetric data sets ... -
Ice-stream dynamics of the SW Barents Sea revealed by high-resolution 3D seismic imaging of glacial deposits in the Hoop area
(Peer reviewed; Journal article, 2018-03-01)Recent developments in seismic acquisition systems and seismic data visualization have contributed to improve the imaging of seismic geomorphologies over a broad range of topics. This study focuses on a new high-resolution ... -
Identification and quantification of soundscape components in the Marginal Ice Zone
(Peer reviewed; Journal article, 2016)Acoustic experiments using an integrated ice station were carried out during August 2012 and September 2013 in the Marginal Ice Zone (MIZ) of Fram Strait. The two experiments lasted four days each and collected under-ice ... -
Identifisering av opphavet til minerogene avsettingar i sedimentkjernar. Ein studie basert på analysar av innsjøsediment og jordartsprøvar frå nedslagsfeltet til den proglasiale innsjøen Dravladalsvatnet nedstraums Nordfonna, Folgefonna.
(Master thesis, 2016-06-01)The focus of this master thesis lies on the possibility to identify the source of the minerogenic material in proglacial lake sediments, downstream the glacier Nordfonna. The identification is based on the comparison between ... -
Identifying climate change information needs for the himalayan region: Results from the GLACINDIA Stakeholder Workshop and Training Program
(Journal article, 2016)Here we present results of a workshop designed to bring together stakeholders from different states of the Indian side of the Himalayan arc and an international group of climate scientists in order to discuss how climate ... -
Identifying flood deposits in lake sediments: Changing frequencies and potential links to long-term climate change
(Doctoral thesis, 2011-05-26)This thesis consists of an introduction and three individual papers that investigate the possibility for identifying the sedimentary imprint of catchment processes in lake sediments, emphasising on extreme events and in ... -
Imaging Discontinuities in the Lithospheric Mantle Using a New, Automated Ps and Sp Receiver Function Workflow
(Master thesis, 2020-12-10)Over the last decades, the receiver function technique has been widely established as a standard tool for surveying sharp changes in elastic properties of the Earth’s crust and upper mantle. To date, very few studies have ... -
Imaging of small-scale faults in seismic reflection data: Insights from seismic modelling of faults in outcrop
(Journal article; Peer reviewed, 2023)Faults with throws that fall below vertical seismic resolution are challenging to identify in reflection seismic datasets. Nevertheless, such small-scale faults may still affect the seismic images, and in this study, we ... -
Imaging Subduction Beneath Mount St. Helens: Implications for Slab Dehydration and Magma Transport
(Peer reviewed; Journal article, 2019)Mount St. Helens (MSH) is anomalously 35–50 km trenchward of the main Cascade arc. To elucidate the source of this anomalous forearc volcanism, the teleseismic‐scattered wavefield is used to image beneath MSH with a dense ... -
Impact of diagenesis on seismic properties of siliciclastic rocks
(Doctoral thesis, 2006-04-25)