In fact, Jerry has been providing commentary at Chaos Manor in regard to the current state of climate science and Global Warming hysteria.

Where’s jerry

http://www.weirdstuff.com/sunnyvale/html/weirdcam.htm

I continue to visit the Manor. Often worth the trip.

BTW, Chaos Manor is still around: http://www.chaosmanorreviews.com/

In which case he is merely exercising his options to:

Unfortunately, preserving the duplicates may cause some difficulty for users familiar with only one “correct” mean monthly temperature value at a station. There are many different ways to use data from duplicates. All have advantages and disadvantages. One can use the single duplicate with the most data for the period of interest; use the longest time series and fill in missing points using the duplicates; average all data points for that station/year/month to create a mean time series; or combine the information in more complicated ways, such as averaging the first difference (FDyear 1 = Tyear 2 – Tyear 1) time series of the duplicates and creating a new time series from the average first difference series. Which technique is the best depends on the type of analysis being performed.

Get the result desired.

This is similiar to RTFM. Read The ..-. ..- -.-. -.- .. -. –. Manual.

How many more mistakes do we have to find in Hansen’s prosecution before he Frees the Code.

Preserving the multiple duplicates provides some distinct benefits. It guarantees no concatenation errors. Adding the recent data from one time series to the end of a different time series can cause discontinuities unless the mean temperature was calculated the same way for both time series.

With Hansen saying that they used a 5 sigma (?, by memory)to determine to reject a data point, doesn’t the above quote indicate that there would certainly be errors in Hansen’s approach due to his implicit assumption that he could combine station data using one method, rather than looking and determining which method was appropriate?