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Blog - El Niño project (part 4) (Rev #4, changes)

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This is a blog article in progress, written by John Baez. To see discussions of the article as it is being written, visit the Azimuth Forum.

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Here is the result: result (click to enlarge):

This is almost but not quite the same as the graph in Ludescher et al:

Niño 3.4

Niño 3.4In Part 3 I mentioned a way to get Niño 3.4 data from NOAA. However, Graham started with data from a different source: is the area-averaged sea surface temperature anomaly in the region 5°S-5°N and 170°-120°W. You can get Niño 3.4 data here:

Monthly Niño 3.4 data index , NOAA. Climate Prediction Center, National Weather Service.

However, The Graham actual started temperatures with in Celsius are close to the NOAA data from I here: mentioned last time.
But the anomalies, which actually give the Niño 3.4 index, are rather different, because they are computed in a different way, that takes global warming into account. See the website for details.

detrended Niño 3.4 data.

Code at Github. It took about 35 minutes to run.

category: blog, climate