On 29 April 2015, four beacons were deployed onto an ice island in the Strait of Belle Isle to record positional data. The ice island later broke up into many fragments, four of which were tracked by the beacons. The relative influences of wind drag, current drag, Coriolis force, sea surface height gradient and sea-ice force on the drift of the tracked ice island fragments were analyzed. Using atmospheric and oceanic model outputs, the sea-ice force was calculated as the residual of the fragments' net forces and the sum of all other forces. This was compared against the force obtained through ice concentration-dependent relationships when sea ice was present. The sea-ice forces calculated from the residual approach and concentration-dependent relationships were significant only when sea ice was present at medium-high concentrations in the vicinity of the ice island fragments. The forces from ocean currents and sea surface tilt contributed the most to the drift of the ice island fragments. Wind, however, played a minimal role in the total force governing the drift of the four ice island fragments, and Coriolis force was significant when the fragments were drifting at higher speeds.

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评估气象和海洋力量对纽芬兰近海冰岛漂移的相对贡献

2015 年 4 月 29 日，在贝尔岛海峡的一个冰岛上部署了四个信标，以记录位置数据。冰岛后来分裂成许多碎片，其中四个被信标追踪。分析了风阻力、海流阻力、科里奥利力、海面高度梯度和海冰力对跟踪冰岛碎片漂移的相对影响。使用大气和海洋模型输出，海冰力被计算为碎片净力的残差和所有其他力的总和。这与存在海冰时通过冰浓度依赖性关系获得的力进行了比较。仅当海冰在冰岛碎片附近以中高浓度存在时，根据剩余方法和浓度依赖性关系计算出的海冰力才显着。来自洋流和海面倾斜的力量对冰岛碎片的漂移贡献最大。然而，风在控制四个冰岛碎片漂移的总力中起最小的作用，当碎片以更高的速度漂移时，科里奥利力很重要。