Quote:
Originally Posted by Bored Wombat
This must be for some other planet.

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These NASA graphs seem to be showing trends of a "Global Temperature Land Ocean Index" with "Temperature Anomaly" plotted against year. Without a defintion of these paramaters (especially the index and anomaly aspect) it is difficult to determine exactly what they show.
Further, the times-series plots posted by Prasham appear to be showing entirely different parameters, and therefore probably cannot be directly compared to the previous graphs of temperature anomaly.
Overall, the trends that both sets of graphs demonstrate is difficult to determine where they are posted in isolation, as the context in which they were originally presented (and their actual intent) are not obvious here.