Antarctic Ice Charts
Based on U.S. National Ice Center's Antarctic daily and weekly analyses, various ice charts are produced to represent ice conditions in a graphical format. Ice conditions are based on ice concentrations, stage of development (ice type / thickness), and 30 day ice concentration changes.
Area
Description
Display / Format
Daily Marginal Ice Zone
A graphical representation of the daily ice analysis that depicts the marginal ice zone (ice concentration up to 80%) in yellow and pack ice (ice concentration 80% and greater) in red.
Weekly Ice Concentration
A graphical representation of ice concentrations based on the weekly ice analysis.
Weekly Stage of Development
A graphical representation of the estimated stage of development/ice thickness based on the weekly ice analysis.
30-Day Ice Change
A graphical representation of the change in sea ice extent over the last 30 days.
