Browsing Department of Earth Science by Title
Now showing items 246-265 of 701
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Harnessing the potential of CT scanning to identify cryptotephra in sediment cores: a controlled experiment.
(Master thesis, 2019-12-20)Volcanic ash (tephra) is a powerful geochronological tool, called tephrochronology, as rapid widespread deposition in multiple environments allows for correlation of geological archives across vast areas. It can thus help ... -
Hemipelagic deposits on the Mendeleev and northwestern Alpha submarine Ridges in the Arctic Ocean: acoustic stratigraphy, depositional environment and an inter-ridge correlation calibrated by the ACEX results
(Peer reviewed; Journal article, 2010)The first high resolution multichannel seismic data from the Mendeleev and Alpha Ridges in the Arctic Ocean have been used to investigate the depositional history, and compare acoustic stratigraphies of the three main ... -
High Mountain Melt-Down: Local Perceptions of Global Warming in the Andes and Himalayas
(Master thesis, 2008)Present scientific knowledge about global warming affirms that ice and snow packs in the high mountains of the world are melting at increasing rates (see IPCC 2007 and UNEP 2007). Melting glaciers and receding snowlines ... -
High resolution benthic Mg/Ca temperature record of the intermediate water in the Denmark Strait across D-O stadial-interstadial cycles
(Peer reviewed; Journal article, 2018)Dansgaard‐Oeschger (D‐O) climate instabilities that took place during Marine Isotope Stage 3 are connected to changes in ocean circulation patterns and sea ice cover. Here we explore in detail the configuration of the water ... -
High resolution seismic stratigraphic analysis: An integrated approach to the subsurface geology of the SE Persian Gulf
(Doctoral thesis, 2006-06-30) -
High-Resolution Environmagnetic Study of HOTRAX Core JPC-14 from the Alpha Ridge, Arctic Ocean
(Master thesis, 2007-11-19)Core JPC-14 was derived from the HLY-0503 expedition from the Alpha Ridge. My supervisor professor Reidar Løvlie guided me with the project, from experiments, data obtaining, and analyisis. -
High-resolution record revealsclimate-driven environmental andsedimentary changes in an active rift
(Peer reviewed; Journal article, 2019-02-28)Young rifts are shaped by combined tectonic and surface processes and climate, yet few records exist to evaluate the interplay of these processes over an extended period of early rift-basin development. Here, we present ... -
A high-resolution study of Holocene paleoclimatic and paleoceanographic changes in the Nordic Seas
(Peer reviewed; Journal article, 2003-03-26)High-resolution records from IMAGES core MD95-2011 in the eastern Norwegian Sea provide evidence for relatively large- and small-scale high-latitude climate variability throughout the Holocene. During the early and ... -
High-resolution δ^18 O and assemblage analysis between 1949- and 2000 AD based on planktonic foraminifera from the Storegga Slide, eastern Norwegian Sea
(Master thesis, 2016-09-28)In this study are presented results from a high-resolution δ^18 O and assemblage analysis between 1949- and 2000 AD based on planktonic foraminifera from core GS13-182-01. The core was retrieved from the head of the Storegga ... -
Higher-order Hamilton–Jacobi perturbation theory for anisotropic heterogeneous media: dynamic ray tracing in Cartesian coordinates
(Peer reviewed; Journal article, 2019)With a Hamilton–Jacobi equation in Cartesian coordinates as a starting point, it is common to use a system of ordinary differential equations describing the continuation of first-order derivatives of phase-space perturbations ... -
Holocene debris flows recognized in a lacustrine sedimentary succession: sedimentology, chronostratigraphy and cause of triggering
(Peer reviewed; Journal article, 2003)This study focuses on the sedimentary characteristics and the chronostratigraphy of Holocene massflow deposits recognized in a lake-fill sedimentary succession. These deposits in lake Ulvådalsvatnet, western Norway, are ... -
Holocene forvitringsrater på fjelloverflater i Hereiane, Hardanger
(Master thesis, 2016-05-28)The Schmidt hammer has been used for relative dating for several decades. In the recent years scientists have approached the study field from a different angle, trying to set up a calibrated dating curve by using the ... -
Holocene glacier variability and Neoglacial hydroclimate at Ålfotbreen, western Norway
(Peer reviewed; Journal article, 2016-02)Glaciers and small ice caps respond rapidly to climate perturbations (mainly winter precipitation, and summer temperature), and the mass-balance of glaciers located in western Norway is governed mainly by winter precipitation ... -
Holocene multi-proxy environmental reconstruction from lake Hakluytvatnet, Amsterdamøya Island, Svalbard (79.5°N)
(Journal article, 2018-03)High resolution proxy records of past climate are sparse in the Arctic due to low organic production that restricts the use of radiocarbon dating and challenging logistics that make data collection difficult. Here, we ... -
Holocene variations in atmospheric circulation in the North Atlantic region reconstructed from lake sediments
(Doctoral thesis, 2016-06-17)Holocene variations in atmospheric circulation in the North Atlantic region have been reconstructed, based on three individual lake sediment studies from sites along the coast of Norway and Svalbard. This thesis contributes ... -
Homotopy analysis of the Lippmann-Schwinger equation for seismic wavefield modeling in strongly scattering media
(Peer reviewed; Journal article, 2020)We present an application of the homotopy analysis method for solving the integral equations of the Lippmann-Schwinger type, which occurs frequently in acoustic and seismic scattering theory. In this method, a series ... -
How well can near infrared reflectance spectroscopy (NIRS) measure sediment organic matter in multiple lakes?
(Journal article; Peer reviewed, 2020)Loss-on-ignition (LOI) is the most widely used measure of organic matter in lake sediments, a variable related to both climate and land-use change. The main drawback for conventional measurement methods is the processing ... -
Hvordan skille glasiale sedimenter fra andre minerogene kilder i bresjøer - Et studie basert på innsjøkjerner og prøver fra tilhørende dreneringsfelt sør for Ålfotbreen
(Master thesis, 2016-06-01)Glacier reconstructions from around the world help us understand how the climate has changed over time. Lake sediments have been used as archives for glacier activity for a long time. The relationship between organic ... -
Hydrogeologi og karstkorrosjon i Grønli-Seterakviferen, Mo I Rana
(Master thesis, 2002)Nykartlegging av grottesystemet ga en total lengde på 7,6 km (Grønligrotta – 4 100 m, Setergrotta – 3 020 m og Langgrotta-Isgrotta - 440 m). Den aktive akviferen under de tørrlagte grottene er undersøkt hovedsakelig ved ... -
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 ...