Arctic sea ice is one of the most visible indicators of our changing climate. Read year-round scientific analysis of Arctic sea ice conditions. We provide an update during the first week of each month, or more frequently as conditions warrant. Get images of Arctic sea ice, updated daily.

Long-term changes in Arctic and Antarctic sea ice are an index of climate change. Browse, compare and animate satellite-derived images that depict current sea ice conditions and trends.

Researchers monitor satellite data on melting in Greenland to understand how melt patterns may be changing. Follow Greenland's melt year-round with daily images & scientific analysis.

Icelights digs into what’s hot in the news around climate and sea ice, provides a behind-the-scenes view of what scientists are talking about, and answers the questions you and your fellow readers send us.

View photographs of the same glacier, taken from the same vantage point and at the same time of year, but many years apart. These photographs can show evidence of glacier and climate change over time.

What are snow, ice, and permafrost telling us about climate change? State of the Cryosphere includes up-to-date assessments of Northern Hemisphere snow cover, mountain glaciers, sea ice, ice shelves, and global sea level, as well as a snapshot of permafrost conditions.