Three posters were prepared for the
Three posters were prepared for the
Bjerknes Centenary 2004: Climate Change in High Latitudes.
Reduced images of the posters are shown below with respective abstracts. Click on any poster image to download a PDF file (approx 2 MB each).
Abstract Under the Arctic Ocean Models Intercomparison Project (AOMIP), results from AWI, IOS and LANL models are compared with respect to circulation, temperature and salinity through the Atlantic Layer. Evaluations are performed as functions of depth and of time over the period 1950 - 2000. Goals include identifying differences among AOMIP models leading to different representations of the Atlantic Layer. The approach in AOMIP is to integrate all of the models in as nearly the same way as possible (common initialization, common forcing, etc.) from Jan 1948 through 2000 (or further). Goals are (1) to see how model results differ among themeselves and from observations, (2) to discover the reasons for different results, and (3) to identify ways for models’ improvement. This poster is concerned with (1) seeing how model results differ.
Abstract Along the eastern side of the N Pacific, shallow flows characterize the eastern limbs of the subtropic and subpolar gyres. Beneath the surface, and sometimes at the surface, poleward flows overlying the continental slope persists from Mexico to the Aleutian Arc. These surface and subsurface flows here define ‘California Currents’. Shallow flows in the Arctic tend to form an anticyclonic and a cyclonic gyre. Beneath the surface, and sometimes at the surface, circumbasin boundary flows overlie the slopes. Such themes are repeated in ocean basins and marginal seas throughout the world. Why? The suggestion is that, of all ways ocean currents can organize, largely independently of applied forcing, the overwhelming majority of outcomes resemble California Currents. This is especially illustrated in the Arctic.
ˆ Abstract We utilize one of the AOMIP (Arctic Ocean Model Intercomparison Project) models to examine the influence that Arctic tides may exert upon the long term climate of the ocean and ice system. Output from a previous tidal model provides a parameterization of vertical mixing in the water column as well as affecting lead opening and mobility of sea ice. Results include loss of heat from the Atlantic Layer, leading to sea ice reduction which is offset by higher growth due to fracturing the ice cover. Climatic consequences are considered beyond the Arctic.
Abstract
Under the Arctic Ocean Models Intercomparison Project (AOMIP), results from AWI, IOS and LANL models are compared with respect to circulation, temperature and salinity through the Atlantic Layer. Evaluations are performed as functions of depth and of time over the period 1950 - 2000. Goals include identifying differences among AOMIP models leading to different representations of the Atlantic Layer.
The approach in AOMIP is to integrate all of the models in as nearly the same way as possible (common initialization, common forcing, etc.) from Jan 1948 through 2000 (or further). Goals are (1) to see how model results differ among themeselves and from observations, (2) to discover the reasons for different results, and (3) to identify ways for models’ improvement. This poster is concerned with (1) seeing how model results differ.
Abstract
Along the eastern side of the N Pacific, shallow flows characterize the eastern limbs of the subtropic and subpolar gyres. Beneath the surface, and sometimes at the surface, poleward flows overlying the continental slope persists from Mexico to the Aleutian Arc. These surface and subsurface flows here define ‘California Currents’.
Shallow flows in the Arctic tend to form an anticyclonic and a cyclonic gyre. Beneath the surface, and sometimes at the surface, circumbasin boundary flows overlie the slopes. Such themes are repeated in ocean basins and marginal seas throughout the world. Why? The suggestion is that, of all ways ocean currents can organize, largely independently of applied forcing, the overwhelming majority of outcomes resemble California Currents. This is especially illustrated in the Arctic.
Abstract
We utilize one of the AOMIP (Arctic Ocean Model Intercomparison Project) models to examine the influence that Arctic tides may exert upon the long term climate of the ocean and ice system. Output from a previous tidal model provides a parameterization of vertical mixing in the water column as well as affecting lead opening and mobility of sea ice. Results include loss of heat from the Atlantic Layer, leading to sea ice reduction which is offset by higher growth due to fracturing the ice cover. Climatic consequences are considered beyond the Arctic.
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