After 15,000 years, it's waking up

Thank you for the video.  Atmospheric CO2 levels lack the temperature forcing leverage to steer climate.  Using rough math estimates atmospheric CO2 is less than 1/2% on average of the temperature forcing effect in earth's atmosphere.  A recent paper on Arctic warming proposes the Atlantic Ocean's warmer waters have been increasingly migrating into the Arctic Ocean razing the temperature of the Arctic Ocean over the last 120 years.  Ocean water heat is a huge climate steering force and does have the leverage to create the warming effects in this video.  That doesn't mean that is the primary cause, but it is a mechanism with the overwhelming temperature forcing leverage needed to warm the Arctic.  

About 1% of the troposphere is water vapor.  Water vapor has a CO2e of 18.  Water vapor H2O gas is considered 18 times more powerful as a greenhouse gas temperature forcing agent than CO2.    Tropospheric water vapor is not adequately accounted for in the United Nation's International Panel on Climate Change reports.  Water vapor varies greatly in the troposphere (lower atmosphere) from nearly zero in Antartica in the winter time to a little over 4% when 100% humidity at 30°C (86°F).  

Treating CO2 and H2O gasses as ideal gasses, which H2O is not, but it is close enough to show how impossible it is for CO2 to play any serious role in atmospheric temperature forcing, tropospheric water vapor is 25 times (1% H2O gas / 0.04% CO2 = 25) more present than all the CO2 in earth's atmosphere.  With a CO2e of 18 this means tropospheric water vapor is 450 times (18 X 25) more of a temperature forcing agent in earth's atmosphere than all the CO2 in earth's atmosphere.  All the other greenhouse gasses add up together to be less than temperature forcing effect of atmospheric CO2.  Giving all the other greenhouse gases a sum total temperature forcing effect the same as CO2, which they are actually less, provides a result of CO2e of  450 tropospheric water vapor + 1 CO2 + 1 other greenhouse gasses for a total of 452 CO2e.   From this total  CO2's leverage as a temperature forcing greenhouse gas in earth's atmosphere is 1/452 or 0.221% or less than 1/4%.   Since water vapor varies greatly in the troposphere and H2O is far from an idea gas stating CO2 is less than 1/2% of the temperature forcing effect in earth's atmosphere is likely to remain true when degrading the less than 1/4% results due more accurate methods and lower water vapor.  These calculations do not include stratospheric water vapor, which can have little effect on warming the earth or the water vapor from the burning of fossil fuels.  

The water vapor from the burning of fossil fuels for the period it is in the atmosphere has a greater greenhouse gas temperature forcing effect than the CO2 placed in the atmosphere from the burning of the same fossil fuels that produced the water vapor.  The water vapor in IPCC reports appears to only be stratospheric water (the stratosphere contains nearly zero water vapor) and the water vapor from the burning of fossil fuels.  From an engineering perspective it is likely more insightful to think of the earth's warming as ocean warming.

Atmospheric CO2 at levels of 10 to 40 ppm is thought to be at saturation for converting high energy ultraviolet radiation high up in the stratosphere into lower frequencies better able to warm the earth.  CO2's ultra violet energy conversion to lower frequencies is thought to be responsible for 50°C of earth's warming.  Without this warming earth would be a snow ball and has been in the past.  This is not a greenhouse gas effect.