A 1,000-Kilometer Warm Current Has Been Discovered in Russia’s Arctic Sector

Oceanographers have identified a surface current exceeding 1,000 kilometers in length within the Russian Arctic. Named the Keldysh Current, the flow transports warm, saline Atlantic water into the northern Kara Sea, directly altering sea-ice dynamics. The findings are detailed in Frontiers in Marine Science. Previous models suggested that Atlantic waters moving northeast through the Barents Sea cooled and increased in density until they sank entirely between Novaya Zemlya and Franz Josef Land, severing contact with the atmosphere. However, researchers from the Shirshov Institute of Oceanology (IO RAN), MIPT, and the Arctic and Antarctic Research Institute (AARI) found a divergence in this process. At the northern periphery, Atlantic water mixes with fresher Arctic masses. This drop in salinity reduces the water's density, preventing it from sinking even as it cools. The result is a distinct surface stream. The Keldysh Current glides above the primary deep-water Atlantic flow, separated by a layer of cold, dense water created during ice formation near Franz Josef Land. Evidence suggests the surface layer is driven by the dynamic momentum of the deeper current.