Sea Ice Extent

Sea ice extent refers to the total area of ocean covered by sea ice at a given time. It is measured by satellites that detect ice coverage, including areas where ice is present, regardless of thickness. This metric helps scientists monitor changes in polar regions, as sea ice extent varies seasonally and over longer periods due to climate change. A decrease in sea ice extent can impact global climate, ocean circulation, and ecosystems by reducing reflective ice surfaces and altering habitat availability. Tracking sea ice extent provides valuable insights into environmental shifts in Earth's polar environments.