82 dossier(s) trouvé(s) portant l’étiquette "sea ice" (les projets pluriannuels sont regroupés):
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Ice Thickness Topography Study - Beaufort Sea
chercheur principal: Melling, Humfrey
Année(s) de permis: 1996 1995 1994 1993 1992 1991 1990
Résumé: The base for operations is the PCSP Base at Tuktoyaktuk. The ice measurements are made by untended instruments operating beneath the sea throughout the year. The instruments to be retrieved in March 1996 were positioned in April 1995. They will be recovered through the ice using aircraft-based logistics. The survey of water properties will be conducted at about 15 selected sites in the offshore...


The Seasonal Sea Ice Monitoring & Modelling Site Project (SIMMS)
chercheur principal: Ledrew, Ellsworth
Année(s) de permis: 1995 1994 1993 1992 1991 1990
Résumé: The researcher will measure the meterorological parameters at two primary sites; first year sea ice and multiyear sea ice. Each site consists of tower based sensors to measure various types of radiation, wind speed, wind direction and air temperatures. In addition, snow and ice temperatures are used. The physical properties of snow (depth, wetness, density, and grain microphotography) will be c...


Ice scour disturbance and the structure of arctic marine benthic communities
chercheur principal: Conlan, Kathleen E.
Année(s) de permis: 1994 1993 1992
Résumé: The researchers will investigate the effect that sea ice has on shaping and scouring the sea bottom since these actions may play a major role in determining the sea bottom environment and the types of plants and animals that may live there. They will revisit the 1992 site in order to determine what new scours have appeared: those locations with fresh scrapes on the bottom will be monitored over t...


Large-scale ice fracture experiments: Phase 2
chercheur principal: Kennedy, Kurt
Année(s) de permis: 1993
Résumé: Ice in the Canadian Arctic often cracks and splits, sometimes forming leads. When an offshore oil drilling platform is struck by a piece of ice, it has been observed that in many cases the ice will split. Once the floe has split, the force it can exert on the drilling platform is greatly reduced. This research is intended to determine why and under what conditions ice floes split. A number of ...


A study of the supply of organic bromine from the ocean to the arctic atmosphere.
chercheur principal: Moore, Robert M.
Année(s) de permis: 1993 1992
Résumé: Previous research has indicated that compounds containing bromine could play a role in the destruction of the ozone layer. This study is part of on-going research that is examining how important northern marine waters are as sources of bromine to the Arctic atmosphere. Seawater, snow and ice will be collected and assessed for bromine. In addition, measurements will be taken to determine if seaw...


Arctic Hydrographic and Gravity Survey
chercheur principal: Koudys, Al
Année(s) de permis: 1994 1993
Résumé: 1993 activities represent the first phase of a four-year project to collect water depth and gravity measurements as well as to determine a safe shipping route through the Coronation Gulf and Victoria Strait. Two helicopters will land at predetermined locations on the sea ice to take measurements. Another helicopter will collect water depth information using airborne electromagnetic techniques. ...


Biogenic Bromine Production in Arctic Waters and Ice Algal Physiology and Sea Ice Optics
chercheur principal: Cota, Glenn
Année(s) de permis: 1994 1993 1992 1991
Résumé: Some natural gases in air react with light and can cause ozone depletion near the earth's surface. Some of these gases are produced by marine plants or algae such as seaweeds and the small single-celled plants causing "brown ice". The researchers will find out what marine plants which contain and/or release these materials called "organohalogen gases". This study will help to determine how much ...


Determination of the Spatial and Temporal Structure of the Compression of Wave Speed and Attenuation in Sea Ice
chercheur principal: Rajan, S.D.
Année(s) de permis: 1992 1990
Résumé: This study will assist in understanding the changes that take place in the structure of sea ice during different seasons. These data will help in determining the strength characteristics of sea ice....


Mesoscale Ice Deformation in the Beaufort Sea
chercheur principal: Topham, David
Année(s) de permis: 1991
Résumé: The Researcher and team will deploy an array to nine ARGOS drift buoys over the period of March to May. A small remote submersible equipped with upward looking sonar will be used in the operation....


Sea Ice Optics
chercheur principal: Maykut, Gary
Année(s) de permis: 1991
Résumé: The Researcher and team will carry out measurements on the shorefast ice next to the PCSP base at Resolute. They will monitor the amount of incoming light at the surface and within the ice. The sunlight transmitted through the ice cover fuels much of the biological activity that takes place in the polar regions. The data will be used to test a theoretical model for predicting light transmission t...


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