How long have we been accurately taking measurements of the ice in the polar regions?
Now how long has the earth had ice ages and interglacial warming periods?
hint: First Satalite that was just had just a radio beep was late 1950’s. First so called weather satelite in 1960 (but I seriously doubt it had camera’s looking at polar ice).
Bt lets use the 1960 date shall we. 1960 to (using round numbers) 2020 is a scant 60 years.
Now lets say the earth has been warming in the latest interglacial period for (again round numbers for ease) 15,000 years ago.
Now we do simple math with rounded numbers: 60/15000 = 0.004
So we have observed the polar ice sheets for 4 tenths of 1 percent of this latest inter glacial period.
Now assume you know a person who is 60 years old. And you’ve know them for .4% of their lifetime. Makes it so you have know that person roughly 90 days.
That number of days you know the 60 year oldgets a lot less when you take into consideration that the earth has had warming and cooling cycles over millions of years. (60/1,000,000 = .00006 or .006%). going back just a million years would be like knowing a 60 year old man for 90 hours (or a about 4 days).
See where I’m going with this?