A5073766624- Methane Hydrates and Related Phenomena
- Atmospheric and Environmental Gas Dynamics
- Geology and Paleoclimatology Research
- Hydrocarbon exploration and reservoir analysis
- Seismic Imaging and Inversion Techniques
- Geological Studies and Exploration
- Geochemistry and Geologic Mapping
- Underwater Acoustics Research
- Seismic Waves and Analysis
- Marine and environmental studies
- Seismology and Earthquake Studies
- Arctic and Antarctic ice dynamics
- Geological formations and processes
- Drilling and Well Engineering
- Remote-Sensing Image Classification
- earthquake and tectonic studies
- Hydraulic Fracturing and Reservoir Analysis
- Paleontology and Stratigraphy of Fossils
- Ichthyology and Marine Biology
- Water Quality Monitoring Technologies
- Mercury impact and mitigation studies
- Marine Biology and Environmental Chemistry
- Cardiovascular and Diving-Related Complications
- Marine animal studies overview
- Spacecraft and Cryogenic Technologies
GEOMAR Helmholtz Centre for Ocean Research Kiel
2014-2019
Norwegian University of Science and Technology
2016-2018
Methane hydrate is an icelike substance that stable at high pressure and low temperature in continental margin sediments. Since the discovery of a large number gas flares landward termination stability zone off Svalbard, there has been concern warming bottom waters have started to dissociate amounts resulting methane release may possibly accelerate global warming. Here, we corroborate hydrates play role observed seepage gas, but present evidence Svalbard ongoing for least 3000 years seasonal...
Hyperspectral seafloor surveys using airborne or spaceborne sensors are generally limited to shallow coastal areas, due the requirement for target illumination by sunlight. Deeper marine environments devoid of sunlight cannot be imaged conventional hyperspectral imagers. Instead, a close-range, sunlight-independent survey approach is required. In this study, we present first image data from deep seafloor. The were acquired in approximately 4200 m water depth new Underwater Imager (UHI)...
Identification of benthic megafauna is commonly based on analysis physical samples or imagery acquired by cameras mounted underwater platforms. Physical collection difficult, particularly from the deep sea, and identification taxonomic morphotypes depends resolution investigator experience. Here, we show how an Underwater Hyperspectral Imager (UHI) can be used as alternative in situ tool for megafauna. A UHI provides a much higher spectral than standard RGB imagery, allowing marine organisms...
Underwater hyperspectral imaging is a relatively new method for characterizing seafloor composition. To date, it has been deployed from moving underwater vehicles, such as remotely operated vehicles and autonomous vehicles. While allow rapid surveying of several 10-1000 m2, they are subjected to short-term variations in vehicle attitude that often compromise image acquisition quality. In this study, we tested stationary platform was landed on the seabed used an imager (UHI) vertical swinging...
Abstract A bottom‐simulating reflector (BSR) occurs west of Svalbard in water depths exceeding 600 m, indicating that gas hydrate occurrence marine sediments is more widespread this region than anywhere else on the eastern North Atlantic margin. Regional BSR mapping shows presence and free several areas, with largest area located north Knipovich Ridge, a slow spreading ridge segment Mid Ridge system. Here heat flow high (up to 330 mW m −2 ), increasing toward axis. The coinciding maxima...
Abstract. Measurements of seismic velocity as a function depth are generally restricted to borehole locations and therefore sparse in the world's oceans. Consequently, absence measurements or suitable data, studies requiring knowledge velocities often obtain these from simple empirical relationships. However, empirically derived may be inaccurate, they typically limited certain geological settings, other parameters potentially influencing velocities, such basement, crustal age, heat flow,...
The Adriatic Sea and underlying lithosphere remains the least investigated part of the Mediterranean Sea. To shed light on plate tectonic setting in this central southern Europe, R/V METEOR cruise M86/3 set out to acquire deep penetrating seismic data the Adriatic formed core an amphibious investigation crossing Adria from the Italian Peninsula into Montenegro/Albania. A total 111 OBS/OBH deployments were successfully carried out, addition 47 landstations both Italy...
The main goal of MSM21/4 was the study gas hydrate system off Svalbard. We addressed this through a comprehensive scientific programme comprising dives with manned submersible JAGO, seismic and heat flow measurements, sediment coring, water column biogeochemistry bathymetric mapping. At interception Knipovich Ridge and the continental margin Svalbard we collected data four flow measurements. These measurements revealed that extent hydrates is significantly larger than previously...