A5062664765- Geological formations and processes
- Methane Hydrates and Related Phenomena
- earthquake and tectonic studies
- Geological and Geophysical Studies
- Geology and Paleoclimatology Research
- Landslides and related hazards
- Atmospheric and Environmental Gas Dynamics
- Hydrocarbon exploration and reservoir analysis
- Coastal and Marine Dynamics
- Geological Studies and Exploration
- Isotope Analysis in Ecology
- Hydrology and Sediment Transport Processes
- Fluid Dynamics Simulations and Interactions
- Coastal wetland ecosystem dynamics
- European Socioeconomic and Political Studies
- Corporate Governance and Management
- Seismic Imaging and Inversion Techniques
- Soil and Unsaturated Flow
- Geological and Geochemical Analysis
- German Economic Analysis & Policies
- Marine Biology and Ecology Research
- Sociology and Education Studies
- Social and Demographic Issues in Germany
- Soil erosion and sediment transport
- Geotechnical Engineering and Soil Stabilization
University of Bremen
2015-2024
GFZ Helmholtz Centre for Geosciences
2001
Kiel University
2000
Submarine landslides pose a hazard to coastal communities as they can generate powerful tsunamis, and threaten critical offshore infrastructure such seafloor cable networks that underpin global communications. Such events be orders of magnitude larger than their onshore equivalents. Despite the pose, many aspects submarine remain poorly understood, why fail on low angle (<2°), seemingly stable slopes. Many studies have proposed failure slope angles, large areal extent landslides, may...
Research Article| April 01, 2000 Newly identified strike-slip plate boundary in the northeastern Arabian Sea Nina Kukowski; Kukowski 1GEOMAR Forschungszentrum für Marine Geowissenschaften der Christian-Albrechts-Universität zu Kiel, Wischhofstrasse 1-3, D-24148 Germany Search for other works by this author on: GSW Google Scholar Thies Schillhorn; Schillhorn Ernst R. Flueh; Flueh Katrin Huhn Geology (2000) 28 (4): 355–358. https://doi.org/10.1130/0091-7613(2000)28<355:NISPBI>2.0.CO;2 Article...
It has been shown that submarine landslides can occur less frequently at subduction zone fore arcs despite the general expectation of extensive slope failures from high neotectonic activity in active margin settings. The Hellenic zone, Greece, represents an example where modern evidence for failure is scarce. Taking deeper parts fore‐arc basin into account, however, a sequence massive landslide deposits found recurrence intervals approximately 250 ± 70 ka. Given seismicity area, this rate...
In marine environments, sediments from different sources are stirred and dispersed, generating beds that composed of mixed layered differing grain sizes.Traditional engineering formulations used to predict erosion thresholds however generally for unimodal sediment distributions, so may be inadequate commonly occurring coastal sediments.We tested the transport behavior deposited consisting a simplified two-grain fraction (silt (D 50 = 55 µm) sand 300 µm)) in laboratory-based annular flume...
Abstract A transect of seafloor heat probe measurements on the Hikurangi Margin shows a significant increase thermal gradients upslope updip limit gas hydrate stability at seafloor. We interpret these anomalously high as evidence for fluid pulse leading to advective flux, while endothermic cooling from dissociation depresses temperatures in field. Previous studies predict seamount subducting Pacific Plate cause overpressure beneath our study area, which may be source pulse. Double‐bottom...
The accumulation of an Organic Rich Layer (ORL) during the last deglaciation in Alboran Sea (western Mediterranean Sea) and its link to changes deep intermediate water circulation are here investigated. Benthic foraminiferal assemblages shallow infaunal foraminifer Uvigerina peregrina δ13C record support establishment sustained high organic matter fluxes, thus eutrophic conditions at sea floor, late phase ORL (Younger Dryas early Holocene periods). Since fluxes were lower (mesotrophic...
Abstract Volcanic flank collapses, especially those in island settings, have generated some of the most voluminous mass transport deposits on Earth and can trigger devastating tsunamis. Reliable tsunami hazard assessments for collapse‐driven tsunamis require an understanding complex emplacement processes involved. The seafloor sequence southeast Montserrat (Lesser Antilles) is a key site study volcanic collapse that span subaerial to submarine environments. Here, we present new 2D 3D seismic...
Framework-forming cold-water corals provide a refuge for numerous organisms and, consequently, the ecosystems formed by these can be considered as impressive deep-sea biodiversity hotspots. If suitable environmental conditions coral growth persist over sufficiently long periods of time in equilibrium with continuous sediment input, substantial accumulations mound deposits consisting fragments and baffled sediments form. Although this conceptual approach is widely accepted, little known about...
Abstract Contourite drifts are sediment deposits formed by ocean bottom currents on continental slopes worldwide. Although it has become increasingly apparent that contourites often prone to slope failure, the physical controls instability remain unclear. This study presents high-resolution sedimentological, geochemical and geotechnical analyses of sediments better understand failure occurred within a sheeted contourite drift Faroe–Shetland Channel. We aim identify characterize plane late...
Abstract. Pressure barrels for sampling and preservation of submarine sediments under in situ pressure with the robotic sea-floor drill rig MeBo (Meeresboden-Bohrgerät) housed at MARUM (Bremen, Germany) were developed. Deployments so-called MDP (MeBo vessel) during two offshore expeditions off New Zealand Spitsbergen, Norway, resulted recovery sediment cores stages equaling hydrostatic pressure. While initially designed quantification gas gas-hydrate contents sediments, also allows analysis...
The main goal of the study was to understand effects grain-size distribution on stability beds in sand-silt range, which is a critical subject for understanding geomorphological processes aquatic environments. Although theoretical models can explain mobilization mixed bed, there clear lack knowledge regarding stabilizing effect non-cohesive fine material. To connect existing findings, we analysed bed relation laboratory experiments. Erosion experiments an annular flume were conducted using...
Abstract Although submarine landslides have been studied for decades, a persistent challenge is the integration of diverse geoscientific datasets to characterize failure processes. We present core‐log‐seismic study Tuaheni Landslide Complex investigate intact sediments beneath undeformed seafloor as well post‐failure landslide deposits. Beneath are coherent reflections underlain by weakly‐reflective and chaotic seismic unit. This unit characterized variable shear strength that correlates...
Abstract Different studies investigating the stability of mixed sediment have found that fine fraction can either stabilize or mobilize bed. This study aims to find where transition between these two modes occurs for sandy and identify underlying (grain‐scale) processes. Flume experiments with bimodal were used investigate near‐bed processes a non‐cohesive bed, in particular how grain shape ratio different sizes influence bed mobility. Medium sand ( D 50,c ≈ 400 μm) was 40 % material...