Why is the Lomonosov Ridge important for Arctic water circulation and ice movement?

The Lomonosov Ridge is a major submarine mountain range that plays a significant role in the Arctic Ocean by dividing it into two distinct deep basins: the Eurasia Basin and the Amerasia Basin.12

This physical division is important for the following reasons:

• Water Circulation: The ridge acts as a topographic barrier that influences the movement of water masses. While circulation of deeper Atlantic water is complex, it has been observed that this water enters the Eurasia Basin and subsequently fans out to enter the Amerasia Basin along a broad front over the crest of the Lomonosov Ridge.3
• Ice Movement: By partitioning the ocean floor, the ridge helps shape the overall oceanographic structure of the region. The movement of surface waters and ice is closely linked, and the ridge’s presence contributes to the complex patterns of circulation that govern how ice drifts across the Arctic basin.13

By influencing these circulation patterns, the Lomonosov Ridge is a key factor in the physical processes that distinguish the Arctic Ocean from other major world oceans.13