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Here's the Land vs. Ocean plot in addition to the hemisphere plot.

I'd like to incorporate this bar chart, because I saw some tweets claiming that this project is evidence that global warming is not real. That annoys me.

http://www.ncdc.noaa.gov/sotc/service/global/glob/201301-201...

And yes, we will write a post on what we learned in making it!

It's not as pretty, but NOAA's single graph looks smoother for both hemispheres[0]. Then again, one's an average of an anomaly, the other is averages of real temperatures.

[0]http://www.ncdc.noaa.gov/sotc/service/global/lo-hem/201201-2...

make sure that you have it on the same month for each year sampled. The dragbar actually changes both year and month. If you instead use the dropdown menu to change the years, it's much more difficult to discern any warming