Then, in the beginning days of February, the Arctic sea ice extent and area both broke records again, as
the entire global sea ice area entered the second - lowest range ever to have been recorded.
Having said that, it is a really small effect — if the
entire Arctic summer
sea ice pack melted (average thickness 2 metres, density ~ 920 kg / m3,
area 3 × 10 ^ 6 km ^ 2 (0.8 % total ocean
area) = > a 4.5 cm rise instantly which implies a
global sea level rise of 0.36 mm.