A5080315848- Methane Hydrates and Related Phenomena
- Marine and coastal ecosystems
- Geological formations and processes
- Geology and Paleoclimatology Research
- Hydrocarbon exploration and reservoir analysis
- Ocean Acidification Effects and Responses
- Marine Biology and Ecology Research
- Groundwater flow and contamination studies
- Paleontology and Stratigraphy of Fossils
- Geochemistry and Elemental Analysis
- Oceanographic and Atmospheric Processes
- Marine and environmental studies
- Atmospheric and Environmental Gas Dynamics
- Aquatic and Environmental Studies
- Groundwater and Isotope Geochemistry
- Mine drainage and remediation techniques
- Stochastic processes and statistical mechanics
- Coral and Marine Ecosystems Studies
- Crustacean biology and ecology
- Isotope Analysis in Ecology
- Underwater Acoustics Research
- Arctic and Antarctic ice dynamics
- Hydraulic Fracturing and Reservoir Analysis
- CO2 Sequestration and Geologic Interactions
- Radioactive element chemistry and processing
Dalhousie University
2011-2022
Max Planck Institute for Marine Microbiology
2008
University of Southern Denmark
2008
University of North Carolina at Chapel Hill
2008
National Oceanography Centre
2001-2003
University of Southampton
2001-2003
Université Laval
1990-1995
University of British Columbia
1986-1987
Yale University
1984
The activities and consequently the bioturbational effects of deposit‐feeding organisms are largely restricted to a narrow surficial zone marine sediments with worldwide, environmentally invariant mean 9.8 cm standard deviation 4.5 cm. Currently available theories infaunal behavior cannot predict quantitatively this observation. A new simple model that accounts for feedback between resource (food) abundance, its reactivity, intensity bioturbation leads quantitative estimate 9.7 This...
Research Article| June 01, 2005 Bubble growth and rise in soft sediments Bernard P. Boudreau; Boudreau 1Department of Oceanography, Dalhousie University, Halifax, Nova Scotia B3H 4J1, Canada Search for other works by this author on: GSW Google Scholar Chris Algar; Algar Bruce D. Johnson; Johnson Ian Croudace; Croudace 2Southampton Oceanography Centre, University Southampton, European Way, Southampton SO14 3ZH, UK Allen Reed; Reed 3Naval Laboratory, Code 7431 Stennis Space Center, Mississippi...
Oceanic uptake of anthropogenic CO2 leads to decreased pH, carbonate ion concentration, and saturation state with respect CaCO3 minerals, causing increased dissolution these minerals at the deep seafloor. This additional will figure prominently in neutralization man-made However, there has been no concerted assessment current extent Here, recent databases bottom-water chemistry, benthic currents, content deep-sea sediments are combined a rate model derive global distribution calcite rates...
Sandy sediments, which cover about 70% of continental shelves and most beaches, are often thought as geochemical deserts that harbor no life because they usually poor in organic matter other reactive substances. Based on the belief significant reactions fluxes a dynamic ecology require large standing stocks reactants matter, sandy sediments neglected.
A general framework is proposed that classie es existing bioturbation models according to two dividing lines: discrete/semi-discrete/continuous and local/nonlocal. Based on a common stochastic approach, which biological reworking of particles as position jump process, the relationships among different model classes are exposed assumptions underlying each explicitly derived. We e nd formulations principally equivalent, leaving basic modeling formalisms: (1) more inclusive nonlocal exchange...
Aller (1977, 1978, 1980) and Yingst (1978) have demonstrated that the presence of well-irrigated worm-tubes other animal burrows in sediments can significantly alter rate exchange solutes between porewater overlying waters. Specifically, modify geometry system such diffuse toward or away from either sediment-water interface burrow. The burrow constitutes an additional boundary source sink. To assess this effect quantitatively marine sediments, (1978, has utilized a mathematical model wherein...
An understanding of the mechanics bubble rise in sediments is essential because role bubbles releasing methane to atmosphere and formation melting gas hydrates.Past models describe predict other buoyant geological bodies through a surrounding solid (e.g., magmas hydrofractures) appear not be applicable soft sediments, this paper presents new model for soft, fine-grained, cohesive sediments.Bubbles such are essentially "dry" (little if any free water) grow process elastic expansion fracture...