No, that increase of 1.1C is above the 1950-1980 Modern baseline.
We calibrate "Global Warming" against the 1850 GMT and a level of 280ppm for CO2. This has been true since the 70's when the first climate models were done.
Work, BTW, that those guys just got Nobel prizes for.
In the early days of the Trump administration, Climate Action Resisters and the Fossil Fuel interests used their power to force the GISS to change the baseline from 1850 to 1880.
1880 was the hottest year of the 19th century. Doing this shaved 0.4C - 0.6C from the measurement of Global Warming.
I document this in detail in this piece.
Trying to square this circle results in the GISS having to say insane things like this.
That warming between 1880 and 2020 was 0.08℃ per decade “on average”. With actual warming of 0.18℃ per decade since 1980. So that 2/3 of “global warming” has occurred between 1980 and 2020 and the total amount of global warming is between 1.0 and 1.2℃ above “the late 19th century”.
As a reality check, what does the paleoclimate data suggest the amount of warming will be?
The atmospheric burden of CO2 is now comparable to where it was during the Pliocene Climatic Optimum, between 4.1 and 4.5 million years ago, when CO2 was close to, or slightly above 400 ppm.
During that time, sea level was about 78 feet higher than today, the average temperature was 7℉ or 3.89℃ higher than in pre-industrial times, and studies indicate large forests occupied areas of the Arctic that are now tundra.
I am saying there has been 1.8C of actual warming since 1850.
We are observing 1.1C of warming because about 0.7C of warming is being "masked" by SOx particulate.
Again, I discuss this in detail in this part of my Climate Report 2022.
Heat doesn’t “just happen” - Where it’s coming from and why that matters.
