Blar i Department of Earth Science på tittel
Viser treff 655-674 av 1103
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Northern hemisphere glaciation during the globally warm early late Pliocene
(Peer reviewed; Journal article, 2013-12-12)The early Late Pliocene (3.6 to ,3.0 million years ago) is the last extended interval in Earth’s history when atmospheric CO2 concentrations were comparable to today’s and global climate was warmer. Yet a severe global ... -
Northward shifts in the polar front preceded Bølling and Holocene warming in southwestern Scandinavia
(Journal article; Peer reviewed, 2020)The last deglaciation in northern Europe provides an opportunity to study the hydrologic component of abrupt climate shifts in a region with complex interactions between ice sheets and oceanic and atmospheric circulation. ... -
Norwegian margin outer shelf cracking: a consequence of climate-induced gas hydrate dissociation?
(Peer reviewed; Journal article, 2010)A series of en echelon cracks run nearly parallel to the outer shelf edge of the mid-Norwegian margin. The features can be followed in a *60-km-long and *5-km-wide zone in which up to 10-m-deep cracks developed in the ... -
Numerical quantification of inheritance in 10Be surface exposure dating of rock avalanche deposits: a case study of the Hølen rock avalanche, northern Norway
(Master thesis, 2024-06-03)Nedarvet kosmogene nuklider er en velkjent, men ofte utelatt usikkerhet når 10Be overflatedatering brukes for a datere fjellskredavsetninger på grunn av hvor utfordrende det kan være å kvantifisere denne usikkerheten. Hvis ... -
Numerical simulation of turbidity currents: a new perspective for small- and large-scale sedimentological experiments
(Master thesis, 2007)Turbidity currents are a variety of subaqueous sediment-gravity flows, in which the suspension of sediment by water turbulence produces a water-sediment mixture that is denser than the ambient water and hence flows due to ... -
Nutrient‑limited subarctic caves harbour more diverse and complex bacterial communities than their surface soil
(Journal article; Peer reviewed, 2022)Background Subarctic regions are particularly vulnerable to climate change, yet little is known about nutrient availability and biodiversity of their cave ecosystems. Such knowledge is crucial for predicting the vulnerability ... -
Observation of Greenland Ice Velocities and Impact of Surface Melt
(Doctoral thesis, 2023-06-14)Isbreer beveger seg og isdynamikken kontrolleres av mange prosesser. I dette arbeidet fokuserer vi spesielt på basalglidning, eller glidning mot underlaget. Basalglidning er interessant å studere fordi grønlandsisen mister ... -
Observing system evaluation based on ocean data assimilation and prediction systems: On-going challenges and future vision for designing/supporting ocean observational networks
(Peer reviewed; Journal article, 2019-07-29)This paper summarizes recent efforts on Observing System Evaluation (OS-Eval) by the Ocean Data Assimilation and Prediction (ODAP) communities such as GODAE OceanView and CLIVAR-GSOP. It provides some examples of existing ... -
Ocean circulation changes off southern Greenland during the abrupt climate events of mid-to-late MIS3
(Doctoral thesis, 2021-03-18)Marine sediment cores from the North Atlantic and ice cores from the Greenland Ice Sheet serve as natural archives of past climate variability. Ice cores have revealed that during the last glacial period the climate comprises ... -
An oceanic perspective on Greenland’s recent freshwater discharge since 1850
(Journal article; Peer reviewed, 2019)Instrumental data evidence an accelerating freshwater release from Arctic sea ice export and the Greenland Ice Sheet over the past three decades causing cooling and freshening in the subpolar North Atlantic region. However, ... -
Ocean–Ice Sheet Coupling in the Totten Glacier Area, East Antarctica: Analysis of the Feedbacks and Their Response to a Sudden Ocean Warming
(Journal article; Peer reviewed, 2023-04-01)We coupled together high-resolution versions of the ocean–sea ice model NEMO and the ice sheet model BISICLES configured to the Totten Glacier area and ran a series of simulations over the recent past (1995–2014) and under ... -
On how the power supply shapes microbial survival
(Journal article; Peer reviewed, 2021)Understanding how environmental factors affect microbial survival is an important open problem in microbial ecology. Patterns of microbial community structure have been characterized across a wide range of different ... -
On integration of rock physics in quantitative seismic interpretation
(Doctoral thesis, 2017-01-23) -
On the accuracy and spatial sampling of finite-difference modelling in discontinuous models
(Journal article; Peer reviewed, 2022)Finite-difference modelling estimates the wavefield in the subsurface by solving the elastic or acoustic wave equation numerically in a discrete version of the subsurface. The derivatives in the wave equation are approximated ... -
On the applicability of a renormalized Born series for seismic wave modelling in strongly scattering media
(Peer reviewed; Journal article, 2020)Scattering theory is the basis for various seismic modeling and inversion methods. Conventionally, the Born series suffers from an assumption of a weak scattering and may face a convergence problem. We present an application ... -
On the biogenicity of Fe-oxyhydroxide filaments in silicified low-temperature hydrothermal deposits: Implications for the identification of Fe-oxidizing bacteria in the rock record
(Peer reviewed; Journal article, 2020)Microaerophilic Fe(II)‐oxidizing bacteria produce biomineralized twisted and branched stalks, which are promising biosignatures of microbial Fe oxidation in ancient jaspers and iron formations. Extracellular Fe stalks ... -
On the evolution of the North Atlantic -from continental collapse to oceanic accretion
(Doctoral thesis, 2013-10-23)The North Atlantic between Iceland and Svalbard and surrounding continental areas represent an ideal laboratory for studying plate tectonic processes, due to the presence of well exposed continent-continent collision ... -
On the potential for megathrust earthquakes and tsunamis off the southern coast of West Java and southeast Sumatra, Indonesia
(Journal article; Peer reviewed, 2022)High seismicity rates in and around West Java and Sumatra occur as a result of the Indo-Australian plate converging with and subducting beneath the Sunda plate. Large megathrust events associated with this process likely ... -
On the relative importance of global and squirt flow in cracked porous media
(Journal article, 2014)A unified theory of global and squirt flow in cracked porous media was developed several years ago on the basis of a combination of the dynamic T-matrix approach to rock physics. The theory has been successfully used to ...