Browsing Department of Earth Science by Title
Now showing items 746-765 of 1244
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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 importance of temperature and precipitation changes for glacial ice sheet stability
(Master thesis, 2023-11-20)Ice sheets undergo periodic advances and retreats, resulting in glacial-interglacial cycles. The Last Glacial Period is widely believed as involving a long-time buildup phase followed by a rapid termination over approximately ... -
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 ... -
On the role of precession in Quaternary glacial cycles
(Journal article, 2023)An outstanding question of the Quaternary glacial cycles is the gradual emergence of a precession signal. Its absence in the Early Pleistocene may be explained by Northern Hemisphere ice sheets varying out-of-phase with a ... -
The onset of flysch sedimentation in the Kaoko Belt (NW Namibia) – Implications for the pre-collisional evolution of the Kaoko–Dom Feliciano–Gariep orogen
(Peer reviewed; Journal article, 2017-09)Detrital zircon provenance study of a metamorphosed sedimentary succession in the eastern part of the Kaoko Belt in Namibia has revealed two distinct sources for the Neoproterozoic sedimentation along the southwestern Congo ... -
Ophiolites of the Central Asian Orogenic Belt: Geochemical and petrological characterization and tectonic settings
(Peer reviewed; Journal article, 2019)We present a compilation of published data (field, petrography, ages and geochemistry) from 73 ophiolitic complexes of the Central Asian Orogenic Belt. The ophiolitic complexes, ranging in age from Neoproterozoic to Triassic, ... -
The origin of large varioles in flow-banded pillow lava from the Hooggenoeg Complex, Barberton Greenstone Belt, South Africa
(Peer reviewed; Journal article, 2011)Exceptionally well-preserved pillowed and massive phenocryst-free metabasaltic lava flows in the uppermost part of the Palaeoarchaean Hooggenoeg Complex of the Barberton Greenstone Belt exhibit both flow banding and large ... -
Orogenesis from bottom to top – Investigating the geodynamics of mountain building using coupled thermo-mechanical-surface-process models
(Doctoral thesis, 2021-03-10)The objective of this project is to The objective of this project is to advance our understanding of mountain building processes in different plate tectonic settings and with specific focus on the interaction between surface ...