How to get the exact temperature from 1880 to 2020? Wherever I look, I find &quot;Temperature Anamolies&quot; which I assume is an annual temperature change relative to the previous year.
If I wanted to find the exact temperatures (based on NASA's accurate forecasts and estimates), can I get them somewhere?
https://data.giss.nasa.gov/gistemp/graphs/graph_data/Global_Mean_Estimates_based_on_Land_and_Ocean_Data/graph.txt
The above link shows the temperature change but if I add them up, the current global temperature comes out somewhere near 21 degrees as opposed to 14 degrees figure I often see everywhere..
I assume is an annual temperature change relative to the previous year.

No, that would be called the rate of change. &quot;Anomaly&quot; means the difference from some reference temperature.