USNIC Weekly Sea Ice Concentration Charts and Climatologies

U.S. National Ice Center (USNIC) data provides weekly charts of Arctic and Antarctic sea ice concentration, including breakdowns by ice type and age. The dataset also contains long-term climatological averages for context. It has been updated to a 'Basic' Level of Service due to funding constraints.

Use Cases

• Tracking weekly sea ice extent changes based on total ice concentration charts.
• Analyzing ice age composition trends using multiyear and first-year ice concentration data.
• Comparing current conditions to historical norms using period-of-record, 5-year, and 10-year climatological averages.
• Assessing navigation hazards by identifying fast ice extent and thin ice concentration areas.

Strengths

• Provides multiple derived ice concentration metrics (total, multiyear, first-year, thin) from an authoritative source (U.S. National Ice Center).
• Includes climatological context with period-of-record, 5-year, and 10-year averages.
• Cross-platform presence (NASA Earthdata, Data.gov) indicates recognized importance and accessibility.

Limitations

• Column names and specific data structure are not provided in any source description.
• Dataset has been downgraded to a 'Basic' Level of Service, which may imply reduced support or updates.
• Exact temporal and spatial resolution of the weekly charts is not specified.

Provenance

Source

U.S. National Ice Center (USNIC), distributed by NSIDC.

Collection Method

Weekly chart generation and gridding, likely from satellite and observational data.

Time Range

Period-of-record (specific start date not provided), with weekly updates.

Freshness

2026-04-09 21:18:33.054742

Geography

Arctic and Antarctic regions.