Category Archives: NCDC – GHCN Issues

Problems and issues in the GHCN and other data sets from NCDC the National Climate Data Center, of NOAA.

GHCN v3.3 vs. v4 Anomaly Graphs – Africa

The GHCN v3.3 vs v4 Anomaly Graphs for Africa. Continue reading

Posted in NCDC - GHCN Issues | Tagged , , , | 19 Comments

Dijibouti – Why? What Changed?

How can a set of static historical thermometers suddenly cool the past and warm the recent times? Continue reading

Posted in AGW Science and Background, Global Warming General, NCDC - GHCN Issues | Tagged , , | 33 Comments

What Difference Does Instrument Selection Make To Anomaly Processed Temperature Data?

I’ve wanted to do an A/B Comparison of “Anomaly Processed Temperatures” with changed instruments since the very first time I ran GIStemp, about a decade ago. Here, I finally get to “scratch that itch”. The claim is made that since it is all “done with anomalies” the actual instruments used does not matter. Here I show otherwise. Instrument selection DOES change the anomalies produced. Continue reading

Posted in AGW Science and Background, NCDC - GHCN Issues | Tagged , , | 18 Comments

Updated GHCN Load Scripts & Reduced Warnings

And inproved version of the MariaDB / MySQL database and data loading scripts, with run times and discussion. Many warnings removed and one data loading bug fixed. Continue reading

Posted in NCDC - GHCN Issues, Tech Bits | Tagged , , , , | 12 Comments