Greetings. My real name is Paul Dominique Barrette, Ph.D., research scientist at the National Research Council of Canada in Ottawa. I was trained as a geologist and later specialized in ice physics, mechanics and hydraulics. In the last number of years, I have been working on issues of applied nature related namely with ice/winter roads, ice-structure interaction, frazil ice, river ice, and others of a geotechnical nature in cold regions offshore environments. My aim is to bring that material into a form that adheres to the wiki's encyclopedic mandate, in three ways:
- By extracting only general information from the scientific/engineering literature, while giving precedence to the most recent sources. This includes textbooks and journal articles, but also conference proceedings papers. I try to avoid web sites.
- I make my own drawings (with Inkscape), and try to keep them as general as possible, simple, self-explanatory and consistent with the article's text. They are based on the literature that was used to write the article and any related background research.
- My role is that of a messenger. Zero opinion (or almost, since the selection of sources is never fully unbiased).
The bulk of my activities
editI began contributing to Wikipedia in 2012. Following are the main articles I have worked on.
Visual media
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Ice — starting from square 1!
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I thin-sectioned this cube and photographed it under cross-polarized light.
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Same procedure but with laboratory-grown saline ice.
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Now for a bigger picture: a hypothetical sea ice dynamics scenario.
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Sea ice by age.
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Stamukhi are grounded pile-ups made from broken sea ice.
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Finger rafting, when thin sea ice converges.
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Another drawing of rafted ice (Finger rafting).
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Analogy with finger rafting (overlapping fingers).
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Lead formation, when sea ice diverges.
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Interaction between two ice floes, leading to pile-up of broken ice.
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Internal structure of a pressure ridge (ice).
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Iceberg gouging the seabed.
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Anatomy of a gouged seabed.
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Buried pipeline and a gouging ice feature.
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Seabed gouging by a pressure ridge.
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A gouging ice ridge drifting toward a buried pipeline.
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Typical strudel pattern on sea ice.
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When a floating ice sheet (top diagram) is flooded (bottom diagram), a strudel may form, leading to buoyancy-driven, jet-like water drainage and associated scour in the seabed (σ: pressure).
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A simple version of a cone penetrometer, which provides the soil's strength profile.
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Principle of a shear vane, for the determination of the soil's undrained shear strength.
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Submarine pipeline resting on the seabed: a few scenarios.
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Submarine pipeline installation - the pull-tow system.
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Submarine pipeline installation by lay-barge: S-,J- and reel-lay.
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Post-trenching of a submarine pipeline.
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Simplistic drawing of compacted snow above a subgrade, used for winter transportation.
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Idealized snowflakes settling into a snow layer.
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The pressures of the water, related with ice buoyancy, upon short-term vertical loading an ice cover. Not to scale — for illustrative purposes only.
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Freeboard on an ice road at different time intervals.
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Ice waves caused by a traveling vehicle - the vertical displacement of the ice surface, vastly exaggerated for illustrative purposes, is indicated as a function of distance to vehicle.