“xenomoly” is correct. The Arctic and Antarctic trends move opposite each other.
During the summer of 1976, almost all of the sea ice around Antarctica melted.
The National Geographic Archive | November 1976 | page 1
But this is what “shrinking” looks like to “Andy”.
NOAA/G02135/south/monthly/images/08_Aug/S_08_extent_anomaly_plot_hires_v3.0.png
Antarctic sea ice extent is very close to the 1979-1990 average.
Charctic Interactive Sea Ice Graph | Arctic Sea Ice News and Analysis