Pack ice, any area of sea ice (ice formed by freezing of seawater) that is not landfast; it is mobile by virtue of not being attached to the shoreline or something else. Pack ice expands in the winter and retreats in the summer in both hemispheres to cover about 5 percent of the northern oceans and
Icebergs - Polar regions fact file, Antarctica and the Arctic
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Polar expedition into the Arctic sea ice
New thinner Arctic ice more sensitive to ocean heat fluxes and
Arctic sea ice winter peak in 2023 is fifth lowest on record
Precipitous' decline in Antarctic sea ice since 2014
Arctic
Pack Ice - an overview
Arctic vs. Antarctic ice melt – DW – 06/14/2017
Scientists Warily Look to Geoengineering to Stave Off Polar
Antarctic Sea Ice Hits a Record Low, but Role of Warming Is