Department of Earth Science
Nye registreringer
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European summer temperatures since Roman times
(Journal article; Peer reviewed, 2016)The spatial context is critical when assessing present-day climate anomalies, attributing them to potential forcings and making statements regarding their frequency and severity in a long-term perspective. Recent international ... -
Tephra horizons identified in the western North Atlantic and Nordic Seas during the Last Glacial Period: Extending the marine tephra framework
(Journal article; Peer reviewed, 2020)Geochemically distinct volcanic ash (tephra) deposits are increasingly acknowledged as a key geochronological tool to synchronize independent paleoclimate archives. Recent advances in the detection of invisible (crypto) ... -
A continuous tephrostratigraphic record from the Labrador Sea spanning the last 65 ka
(Journal article; Peer reviewed, 2020)Volcanic ash preserved in marine sediment sequences is key for independent synchronization of palaeoclimate records within and across different climate archives. Here we present a continuous tephrostratigraphic record from ... -
Tephrochronology of the North Atlantic during the Last Glacial period – a paleoclimate synchronization tool
(Doctoral thesis, 2021-04-09)During present time, the global climate is changing at a rapid pace. To understand the future consequences of these changes, studies of past abrupt climate change are essential. A natural analogue to the current climate ... -
Warm Middle Miocene Indian Ocean Bottom Water Temperatures: Comparison of Clumped Isotope and Mg/Ca‐Based Estimates
(Journal article; Peer reviewed, 2020)The middle Miocene is an important analogue for potential future warm climates. However, few independent deep ocean temperature records exist, though these are important for climate model validation and estimates of changes ... -
Clumped isotope thermometry in bivalve shells: a tool for reconstructing seasonal upwelling
(Journal article; Peer reviewed, 2021)Carbonate clumped isotope thermometry is a powerful tool for reconstructing paleotemperature and paleosalinity. Despite its broad application in biotic and abiotic materials, its use in paleoclimate studies has been limited ... -
Coupled Southern Ocean cooling and Antarctic ice sheet expansion during the middle Miocene
(Journal article; Peer reviewed, 2020)The middle Miocene climate transition (~14 million years ago) was characterized by a dramatic increase in the volume of the Antarctic ice sheet. The driving mechanism of this transition remains under discussion, with ... -
Shear zone evolution during core complex exhumation – Implications for continental detachments
(Journal article; Peer reviewed, 2020)The formation of low-angle detachments involves exhumation of previously ductile material and fault zone weakening. To better understand this relationship, we studied a deeply eroded metamorphic core complex, which formed ... -
Seismic expression of shear zones: Insights from 2-D point-spread-function based convolution modelling
(Journal article; Peer reviewed, 2020)Shear zones are common strain localization structures in the middle and lower crust and play a major role during orogeny, transcurrent movements and rifting alike. Our understanding of crustal deformation depends on our ... -
Strain migration during multiphase extension, Stord Basin, northern North Sea rift
(Journal article; Peer reviewed, 2021)In regions experiencing multiple phases of extension, rift‐related strain can vary along and across the basin during and between each phase, and the location of maximum extension can differ between the rift phase. Despite ... -
Drainage integration and sediment dispersal in active continental rifts: A numerical modelling study of the central Italian Apennines
(Journal article; Peer reviewed, 2018)Progressive integration of drainage networks during active crustal extension is observed in continental areas around the globe. This phenomenon is often explained in terms of headward erosion, controlled by the distance ... -
Quantifying Dynamical Proxy Potential Through Shared Adjustment Physics in the North Atlantic
(Journal article; Peer reviewed, 2020)Oceanic quantities of interest (QoIs), for example, ocean heat content or transports, are often inaccessible to direct observation, due to the high cost of instrument deployment and logistical challenges. Therefore, ... -
Exceptionally high heat flux needed to sustain the Northeast Greenland Ice Stream
(Journal article; Peer reviewed, 2020)The Northeast Greenland Ice Stream (NEGIS) currently drains more than 10 % of the Greenland Ice Sheet area and has recently undergone significant dynamic changes. It is therefore critical to accurately represent this feature ... -
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 ... -
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 ... -
Transient landscape and stratigraphic responses to drainage integration in the actively extending central Italian Apennines
(Journal article; Peer reviewed, 2020)Drainage networks in continental rifts are generally reported as dynamic features that produce transitions between endorheic and exorheic conditions. While this is of major importance for landscape development, sediment ... -
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 ... -
Lessons from a high-CO2 world: an ocean view from ∼ 3 million years ago
(Journal article; Peer reviewed, 2020)A range of future climate scenarios are projected for high atmospheric CO2 concentrations, given uncertainties over future human actions as well as potential environmental and climatic feedbacks. The geological record ... -
Passive seismic recording of cryoseisms in Adventdalen, Svalbard
(Journal article; Peer reviewed, 2021)A series of transient seismic events were discovered in passive seismic recordings from 2-D geophone arrays deployed at a frost polygon site in Adventdalen, Svalbard. These events contain a high proportion of surface wave ... -
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, ...
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