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Wherever I look, I find "Temperature Anamolies" 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..

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  • $\begingroup$ You need first to find the temperature of the reference period, in this case, it is 1951-1980 (as mentioned on their website) then add it to the anomalies, e.g., 1920's anomaly is -0.6 and 1951-1980 mean value is 14 then 1920's temp is 13.4°C. I have checked their website only anomalies are provided. I will give it a look again. $\endgroup$
    – ahmathelte
    Feb 27 at 16:04
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    $\begingroup$ I’m voting to close this question because this question, as written, makes no sense. $\endgroup$
    – David Hammen
    Feb 27 at 17:33
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    $\begingroup$ We may do well to be patient with questions. Some may come from youth or people where English isn't their first language. Others may just make foolish or naïve mistakes... I certainly have made enough in my day. The question makes sense, he just didn't understand how things work, and while it may not be a common question, the next person to make the same mistake may find this and be helped :-) They are showing an attempt to learn themselves, likely without any formal education on the topic, and more credit to them! $\endgroup$
    – JeopardyTempest
    Feb 27 at 18:41
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    $\begingroup$ ... I tried my best to defend your basic misunderstanding to those who wanted the question closed. Suffice to say you've worn out my positive grace at this point and proven me wrong. Reopening questions, like anything, is voted upon by those who've proven successful here by putting in effort and giving useful contributions to understanding, typically those who interact in scientific discourse in open and humble ways. Kindness goes a lot further than attitude. If your goal is bellicose debate rather than to get a straightforward question answered, you won't find many bites here. Have a good day $\endgroup$
    – JeopardyTempest
    Feb 28 at 9:48
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    $\begingroup$ @Abhay Re I want to show that there is a rise in 3 or 4 degrees in merely 140 years, which was unheard of pre-industrialization era -- You will not be able to show that. The temperature change over the last 140 years is "only" 1.2 degrees Celsius or so. That alone remains unheard of. Even more unprecedented is that almost all of that change (about 1 degree Celsius) occurred over the last 45 years. One degree doesn't seem like much, and it's not. The issue is what things going will look like in 2100. (continued) $\endgroup$
    – David Hammen
    Feb 28 at 10:53
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I assume is an annual temperature change relative to the previous year.

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

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  • $\begingroup$ But if take the numbers (anomalies) as differences to the temperature of 1880 (say, this is the reference), adding them to 1880 temperature should give me the exact temperature of each year? $\endgroup$
    – Abhay
    Feb 28 at 6:53
  • $\begingroup$ Yes. It is explained in their FAQ. $\endgroup$
    – Keith McClary
    Feb 28 at 17:49

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