from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun statistics Any of the two
pointsthat divide an ordered distributioninto three parts, each containing a thirdof the population.
- noun statistics Any one of the three groups so divided.
Sorry, no etymologies found.
However, as mentioned above somewhere, when he altered his definition from lowest-tercile to lowest-decile, there was no significant difference in the trends.
There is some question as to how it is possible to assign each station day to one of two windspeed classifications that are defined by a tercile binning.
The boundary layer gives a whit about the decile or tercile of wind speed.
Instead of looking at really windy nights, take wind speed in terciles so that even the top tercile has many nights with insufficient wind to affect UHI.
Also, one other thing bugged me about parker and that was the characterization of winds speed by tercile.
Barrow shows that a tiny town in the midst of a sea of pack ice and permafrost maintains a UHI greater in magnitude than the alleged ‘global warming’ effect – even into its third tercile of local wind speeds.
There is no problem in omitting the data points of the middle tercile, as long as you still have a dense-enough collection of windy and calm days that you can do a good interpolation see #15.
RE: #414 – Or, his assumption that UHI would be “blown away” by upper tercile velocity winds was wrong.
In Section 3, Parker points out that when he tried out a change of definition of “calm” from “lightest tercile” to “lightest decile”, the global trend in Tmin did not change.
The MSE estimates are converted into weights for each GCM for developing multimodel tercile probabilities.
Watts Up With That? 2010