The North Pole moves as ice sheets melt (Greenland is losing mass)

[muriel_volestrangler]

19. For a change of a few centimetres a year? No.

It's pretty amazing that they can measure it that accurately, if you ask me. But the article points out there are seasonal and a 14 month variation that dwarf this, and it's only when you remove those that you can see this. So if this does affect GPS positioning which has to be accurate to centimetres, then they must already have a system that can take into account the seasonal adjustment, so they'd just reprogram to include the long-term drift, now they've discovered it.