John McLean writes relative to our previous story on this issue: Friday Funny: more upside down data
A few hours ago I received an email from John Kennedy at the Hadley Centre to say that HadSST3 data had been corrected.
A message now appears at the top of http://www.metoffice.gov.uk/hadobs/hadsst3/ , saying:
“08/04/2016: An error in the format of some of the ascii files was brought to our attention by John McLean. Maps of numbers of observations and measurement and sampling uncertainties provided in ascii format ran from south to north rather than north to south as described in the data format. This has now been fixed. In some cases, the number of observations in a grid cell exceeded 9999 and were replaced by a series of asterisks in the ascii files. This too has been fixed with numbers of observations now represented as integers between 0, indicating no data, and 9,999,999, indicating lots of data. “
“9,999,999 indicating lots of data”? Why not just say an 8 digit integer field? On the bright side, the data is now integer form and overflows have been corrected.
This correction joins the early corrections of HadSST3-nh.dat and HadSST3-sh.dat made by the CRU, with the note on https://crudata.uea.ac.uk/cru/data/temperature/ saying
Correction issued 30 March 2016. The HadSST3 NH and SH files have been replaced. The temperature anomalies were correct but the values for the percent coverage of the hemispheres were previously incorrect. The global-mean file was correct, as were all the HadCRUT4 and CRUTEM4 files. If you downloaded the HadSST3 NH or SH files before 30 March 2016, please download them again. “
Note that neither makes any reference to how long the problems have been there!