Graph of the Day: Spot the Outlier
August 30, 2011
Thanks to Scott Mandia for tipping me on this one. You can click the images to get larger ones.
In my recent blog entry Texas Drought: A Fingerprint, I illustrated how unusual this year’s precipitation has been compared to previous years. Now, with just a few days left in August, I’d like to show you just how unusual the combination of summer temperatures and summer rainfall has been.
Here is a plot of Texas average summer (June-August) temperature versus Texas summer precipitation. Records go back to 1895. (In the first graph above..PS) ..I’ve left off 2011.
Can you spot the outlier? The year 2011 continues the recent trend of being much warmer than the historical precipitation-temperature relationship would indicate, although with no previous points so dry it’s hard to say exactly what history would say about a summer such as this one. Except that this summer is way beyond the previous envelope of summer temperature and precipitation.