A5071804651- Methane Hydrates and Related Phenomena
- CO2 Sequestration and Geologic Interactions
- Geology and Paleoclimatology Research
- Ocean Acidification Effects and Responses
- Marine and coastal ecosystems
- Microbial Community Ecology and Physiology
- Marine and environmental studies
- Coastal wetland ecosystem dynamics
- Calcium Carbonate Crystallization and Inhibition
- Geological Studies and Exploration
- Geological formations and processes
- Mercury impact and mitigation studies
- Oceanographic and Atmospheric Processes
- Carbon Dioxide Capture Technologies
GEOMAR Helmholtz Centre for Ocean Research Kiel
2023-2024
Recent studies have begun to explore the potential of enhanced benthic weathering (EBW) in Baltic Sea as a measure for climate change mitigation. To augment understanding EBW under seasonally changing conditions, this study aims investigate processes anoxia hypoxia corrosive bottom waters, which reflect late summer conditions Sea. Dunite and calcite were added sediment cores retrieved from Eckernförde Bay (Western Sea) with constant flow-through deoxygenated, CO 2 -enriched water. The...
Sediment fluxes to the seafloor govern fate of elements and compounds in ocean serve as a prerequisite for research on elemental cycling, benthic processes sediment management strategies. To quantify these over areas, it is necessary scale up mass accumulation rates (MAR) obtained from multiple sample stations. Conventional methods spatial upscaling involve averaging data or interpolation. However, approaches may not be sufficiently precise account variations MAR, leading poorly constrained...
Enhanced mineral dissolution in the benthic environment is currently discussed as a potential technique for ocean alkalinity enhancement (OAE) to reduce atmospheric CO 2 levels. This study explores how biogeochemical processes affect of alkaline minerals surface sediments during laboratory incubation experiments. These involved introducing dunite and calcite organic-rich from Baltic Sea under controlled conditions an oxic environment. The sediment cores were incubated with bottom water....
Dissolved silicate (H 4 SiO ) is essential for the formation of opaline skeletal structures diatoms and other siliceous plankton. A fraction particulate biogenic silica (bSi) formed in surface waters sinks to seabed, where it either dissolves returns water column or permanently buried. Global budgets are still poorly constrained since data on benthic bSi cycling lacking, especially continental margins. This study describes Skagerrak, a sedimentary depocenter particles from North Sea....
Since industrial times, human and natural processes have affected the sediment system of North Sea. As a substantial proportion suspended in Sea is ultimately deposited Skagerrak, it offers representative archive for reconstructing temporal variability system. However, little known about how sedimentation rates Skagerrak may changed over time. In this study, we present high-resolution age-depth models based on radionuclide 210Pb anthropogenic time markers 137Cs, 14C mercury to determine...
Marine carbon dioxide removal (mCDR) and geological storage in the marine environment (mCS) promise to contribute mitigation of global climate change combination with drastic emission reductions. However, implementable potential mCDR mCS depends, apart from technology readiness, also on site-specific conditions. In this paper, we explore different options for mCS, using German context as a case study. We challenge each option remove 10 Mt CO2 yr-1, which accounts 8-22% projected...
Abstract The natural dissolution of mafic silicate rocks (e.g. dunite) and carbonate minerals in the marine environment increases alkalinity draws down CO2. Consequently, large-scale manual dispersal such has been proposed as a potential measure to alleviate rising atmospheric CO2 levels through ocean enhancement (OAE). This study investigates effects biogeochemical processes on alkaline mineral surface sediments controlled experimental environment. Dunite calcite were added organic...