Browsing Oceanography Faculty Research, Publications and Presentations by Title
Now showing items 1-20 of 151
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Absolute probability estimates of lethal vessel strikes to North Atlantic right whales in Roseway Basin, Scotian Shelf
Vessel strikes are the primary source of known mortality for the endangered North Atlantic right whale (Eubalaena glacialis). Multi-institutional efforts to reduce mortality associated with vessel strikes include vessel-routing ... -
Accelerometer tags: detecting and identifying activities in fish and the effect of sampling frequency
Monitoring and measuring the behaviour and movement of aquatic animals in the wild is typically challenging, though micro-accelerometer (archival or telemetry) tags now provide the means to remotely identify and quantify ... -
Acoustic scattering from density and sound speed gradients: Modeling of oceanic pycnoclines
A weak-scattering model that allows prediction of acoustic scattering from oceanic pycnoclines (and the accompanying sound speed gradients) based on hydrographic profiles is described. Model predictions, based on profiles ... -
Acoustic scattering from double-diffusive microstructure
Laboratory measurements of high-frequency broadband acoustic backscattering (200-600 kHz) from the diffusive regime of double-diffusive microstructure have been performed. This type of microstructure, which was characterized ... -
The adjoint method of data assimilation used operationally for shelf circulation
A real-time shelf circulation model with data assimilation has been successfully used, possibly for the first time, on the outer Nova Scotian Shelf, The adjoint method was used to infer the time histories of flows across ... -
Aerobic hydrogen production and dinitrogen fixation in the marine cyanobacterium Trichodesmium erythraeum IMS101
Rates of hydrogen production and acetylene reduction were measured in aerobic cultures of the marine cyanobacterium Trichodesmium erythraeum IMS101 grown in a supplemented seawater medium low in combined inorganic nitrogen. ... -
Air-Sea CO2 fluxes on the Scotian Shelf: seasonal to multi-annual variability
We develop an algorithm to compute pCO(2) in the Scotian Shelf region (NW Atlantic) from satellite-based estimates of chlorophyll-a concentration, sea-surface temperature, and observed wind speed. This algorithm is based ... -
Anisotropy in high-frequency broadband acoustic backscattering in the presence of turbulent microstructure and zooplankton
High-frequency broadband (120-600 kHz) acoustic backscattering measurements have been made in the vicinity of energetic internal waves. The transducers on the backscattering system could be adjusted so as to insonify the ... -
Assessment of the processes controlling seasonal variations of dissolved inorganic carbon in the North Sea
We used a seasonal North Sea data set comprising dissolved inorganic carbon (DIC), partial pressure of CO2 (pCO(2)), and inorganic nutrients to assess the abiotic and biological processes governing the monthly variations ... -
Assessment of the relationships between dominant cell size in natural phytoplankton communities and the spectral shape of the absorption coefficient
Size-fractionated chlorophyll concentration and phytoplankton absorption spectra were compared for a wide variety of natural communities. We found that, in general, when phytoplankton abundance increases, larger size-classes ... -
Assimilating long-term hydrographic information into an eddy-permitting model of the North Atlantic
No abstract available. -
Biological processes and optical measurements near the sea surface: Some issues relevant to remote sensing
There is good evidence that bio-optical relationships are altered near the surface: (1) the fluorescence yield from chlorophyll declines, leading to bias in the estimation of pigment from fluorometry; (2) the modeled ... -
Bioturbation and porosity gradients
Ubiquitous porosity gradients have a potentially important effect on the mixing of particle-bound tracers, such as Pb-210. Mass-depth coordinates cannot be used to deal with these effects if values of the traditional mixing ... -
Bromoperoxidase and iodoperoxidase enzymes and production of halogenated methanes in marine diatom cultures
Halogenated methanes produced in the oceans are important as carriers of chlorine, bromine, and iodine into the atmosphere. There they play roles in the regulation of ozone in the stratosphere and perhaps in the Arctic ... -
The carbon budget of the North Sea
A carbon budget has been established for the North Sea, a shelf sea on the NW European continental shelf. The carbon exchange fluxes with the North Atlantic Ocean dominate the gross carbon budget. The net carbon budget ...
