Research suggests that the iron supply to the Amundsen Sea in Antarctica comes primarily from circumpolar deepwater and continental subglacial sources. This finding has implications for climate change, as it appears that Antarctic ice melt may not be providing as much iron to the ocean as previously thought, potentially affecting the ocean's ability to absorb carbon. The relationship between Antarctic ice sheet dynamics, iron supply, and carbon uptake in the Southern Ocean is complex and is the subject of ongoing study.