The large-scale movement of waters in the basins of the ocean is known as ocean circulation. The wind mediates surface circulation and the sinking and cooling of water in the Polar Regions mediate deep circulation. The conduction of warm upper waters towards the poles from the tropic is done by surface circulation.
1. In the given question, if large amounts of water are supplemented in the Polar Regions as glaciers melt then the warm water will exhibit a more difficult time in flowing towards north.
2. The effect it could impart in the area is that the local temperature would increase more.
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