As Antarctic sea ice continues its dramatic decline, we need more measurements and much better models

After two seasons of record-breaking lows, Antarctica’s sea ice remains in dramatic decline, tracking well below any winter maximum levels observed since satellite monitoring began during the late 1970s.

A layer of frozen seawater that surrounds the Antarctic continent, sea ice cycles from maximum coverage in September to a minimum in February. The summer minimum has also continued to diminish, with three record low summers in the past seven years.

Some scientists have suggested…