Graphs like the one above purporting to ice loss in Greenland and Antarctica are worthless, for several reasons.
- The are generated by people with a global warming agenda who don’t understand the mathematics and science underlying their calculations.
- Gravity data shouldn’t change as the ice grows or melts.
The Greenland ice sheet is two miles thick and is is very heavy. It’s weight depresses the crust and causes the mantle to be displaced to the sides. The mass of displaced mantle is approximately equal to the mass of the ice sheet. If the ice sheet was growing, it would cause an equal mass of mantle to be displaced to the sides. If the ice sheet was shrinking, it would cause an equal mass of the mantle to flow back under the ice sheet. Whether the ice sheet is expanding or shrinking, the total mass in a vertical column should be relatively constant.
Climate scientists aren’t very bright, and don’t understand the basics of geology and geophysics.
estimates failed to account for glacial isostatic adjustment
Unless you understand what is going on underneath the ice sheet, you can’t use gravity data – and no one really knows what is going on underneath the ice sheet. Rock is three times as dense as ice, and small changes in geology show up as imaginary large changes in ice.
Greenland’s largest glaciers have been expanding over the past six years.
The surface mass balance is rapidly growing. But let’s ignore all that and focus on junk science gravity interpretations by climate science hacks.