I’ll look over the USHCN list and try to ID what max-min stations remain. Important to get them surveyed before they get converted to MMTS.

“Mosh let me make sure I understand the above graph.

1. This is plots of traditional stations in Stevenson Screens using mercury max-min thermometers only.”

A.I took your spreadsheet. I sorted on INSTRUMENTS. I Selected the MINMAX. I assume this LIG old style
minmax in Stevenson shelters.

B. I took that list of MinMax stations (200+). I sorted on CRN. I selected CRN1, CRN2, CRN3. THIS gave
me 39 stations.

C. I Fed this list of stations to Opentemp.

2. The GISS plot is the same stations, using GISS’s own data source.

A. No GISS is the GISS anomaly published on NASA. It represents the anomaly from 1950-1981. This
IS ALL THE STATIONS USED by GISS. So, it includes the 39 stations. Basically, if I
removed the 39 stations from GISS the picture would get worse.

3. The CRN123mm plot is using USHCN data V1

The CRN123mm plot uses the ghcnv2 data. I have not switched to johns new data set and it wont
make a differene here. Later I will download the lastest data, but right now I am using the
Orginal OpenTemp and orginal Ghcnv2 data. For the most part JohnV, Kenneth and I have
had very similiar results without regard to data sources ( quibbling about Tobs, shap, filnet etc)
Nothing dramatic. SteveMc and JohnV have the newer ushcn data. He can double check my work. The best thing
you can do is a BLIND duplication of my station list. MINMAX ONLY, CRN123. give that to JohnV to run
and steveMC. Clayton can run it too as can Kenneth.

I Use 11.2C to create my anomaly. This is the 1950-1981 Mean for all 1221 sites.
SteveMc and JohnV do something slightly different. But the difference in absolute
temp was so huge, you cannot ignore it.

4. The output is from OpenTemp, most recent build.

I believe so. There havent been anychanges except some minor issues relating to 2006 and incomplete
years. STILL, I would insist that JohnV, kenneth, Clayton, SteveMc, rerun.

Did I miss anything in getting the parameters of this run defined?

Not really. here are my concerns.

1. My selection of stations. Clayton has a database built. he should double check. Same with StMac.
2. Stations in the grid. I got 38 ( one dropped) thats still a low number.
3. We are talking anomaly in my chart HERE. TREND is a differrent issue. JohnV and Kenneth will righfully
pummel me If I dont point this out. Still, I believe the KEY to finding a trend difference is
finding a difference in absolute C. ( HUNCH )
4. ASOS is Warmer than Norm and Warming.
5. GEOGRAPHY can screw this up. Especially altitude differences. But I can imgine why
high alt sites would be minmax? Could be a correlation.

Bottom line I have been slicing through the data in a bunch of different ways. I did the instrument slice
today for the hell of it and bam.

Need to get dates when each station switched over. Obviously ASOS and H0 83 dont go back to 1880

Was that confusing enough?

1. This is plots of traditional stations in Stevenson Screens using mercury max-min thermometers only.

2. The GISS plot is the same stations, using GISS’s own data source.

3. The CRN123mm plot is using USHCN data V1

4. The output is from OpenTemp, most recent build.

Did I miss anything in getting the parameters of this run defined?

I have been pondering this CRN thing. One thing that occurred to me is we repeatedly found good
stations turned into bad stations by changes in equipment. Notably the MMTS which moved the
sensor closer to buildings. So, I started to cut the data a bit differently.

1. Here is a first Cut. CRN123 WITH the MinMax gauges. Old school. Here are the anomalies

For GISS and For CRN123mm. 5 year smooth trailing.

If stations are outside of the boundary do they still contribute to cells that are within 1000km or are they ignored?

I haven’t been able to find a better boundary list online; they’re too detailed.