1: The cap of sea ice that spreads across the Arctic Ocean in winter appears to have been the smallest on record this year , according to NASA . 2: Scientists say it does n't necessarily follow that a low maximum winter extent will mean a record amount of shrinkage in sea ice over the summer , however . 3: Scientists say Arctic sea ice appears to have set a record low maximum extent this winter .
1: The cap of sea ice that spreads across the Arctic Ocean in winter 2: sea ice 3: Arctic sea ice