Written by the Fiveable Content Team • Last updated September 2025
Verified for the 2026 exam
Verified for the 2026 exam•Written by the Fiveable Content Team • Last updated September 2025
Definition
Sea ice refers to frozen seawater that forms and floats on the surface of the ocean. It is different from icebergs, which are formed by glaciers on land.
Related terms
Arctic Amplification: This term describes the phenomenon where warming temperatures in the Arctic region cause accelerated melting of sea ice, leading to further warming.
Albedo Effect: The albedo effect refers to how much sunlight is reflected back into space by a surface. Sea ice has a high albedo, meaning it reflects more sunlight than open water, which helps regulate Earth's temperature.
Polar Bears: These iconic creatures rely on sea ice for hunting seals and traveling long distances. As sea ice melts due to climate change, polar bears face habitat loss and struggle to find food.