Http Dx Doi Org 10 1080 03091928508219269, Aug 18, 2006
A depth-dependent model for the topographic rectification of tidal currents in a homogeneous rota... more A depth-dependent model for the topographic rectification of tidal currents in a homogeneous rotating fluid is used to examine the dependence of the rectified mean flow on various tidal, topographic and frictional parameters. Friction is parameterized through a vertically-uniform, time-independent vertical eddy viscosity and a bottom stress law applied near the top of the constant stress layer. The model neglects the interaction of mean and tidal currents, assumes uniformity along isobaths, and is closed with the assumption of zero depth-averaged mean flow across isobaths.
Research and advisory activities at the Bedford Institute of Oceanography provide important infor... more Research and advisory activities at the Bedford Institute of Oceanography provide important information toward development of Canada's offshore oil and gas reserves in a way that will minimize risks and adverse environmental effects. Focal areas are assessments of offshore hydrocarbon reserves, seabed stability, and geohazards by NRCan's Geological Survey of Canada (GSC) Atlantic; descriptions of the physical ocean environment and evaluations of the potential impacts of oil and gas activities on biota and fisheries by DFO's Science Branch; and the development of integrated management strategies by DFO's Oceans and Habitat Branch. Activities include instrument development, field and laboratory experiments, computer modelling, and interpretative studies to understand ocean ecosystems and their sensitivity to disturbances. BIO researchers provide scien-tific advice to industry, regulators, environmental emergency respon-ders, and others involved in decisions regarding s...
Warming of Earth's climate system is now unequivocal and most of the observed warming since t... more Warming of Earth's climate system is now unequivocal and most of the observed warming since the mid-20 th century is very likely due to increasing greenhouse gas concentrations in the atmosphere. This is the conclusion of the Fourth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC) released in 2007. Observations show increases in air and ocean temperatures, decreases in snow and ice coverage, and rising sea levels. The Labrador Sea plays a pivotal role in the changing large-scale ocean climate system. The Labrador Sea is also particularly vulnerable to climate change, since it lies in a transition zone between the Arctic to the north and the warm subtropics to the south. DFO scientists at BIO are monitoring climate change in the Labrador Sea while exploring the impacts of climate variability and climate change on the physical and chemical properties and the ecosystems of this important ocean region.
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Papers by John W Loder