WUWT readers may recall last week that we had an excellent guest analysis by Bob Tisdale titled:
Easy come, easy go. The data has been changed. Read on – Anthony
Guest Post by Bob Tisdale
I was advised today (Thanks, Fred) that the NODC has revised their Ocean Heat Content data. A quick check of the KNMI Climate Explorer News webpage…
…reveals that it was revised on October 15, 2009 at KNMI.
And a check of the NODC data…
…shows that it was corrected on 10/15/09.
Dr. Geert Jan van Oldenborgh writes, “There was an error in the last 3-month data point of the NODC ocean heat content dataset, as anyone who made a map of the data could see. The problem has been fixed at NODC (thanks Gavin, Tim).”
Apparently the NODC hadn’t bothered to plot the data prior to posting it on September 14, 2009, or hadn’t thought there was a problem until…
Here’s a gif of the correction
Thanks, Gavin and Tim.
Hmm, I’ll have to go back and update the “ENSO Dominates NODC Ocean Heat Content (0-700 Meters) Data” post to make sure the ENSO-induced step changes are still there and verify the “North Atlantic Ocean Heat Content (0-700 Meters) Is Governed By Natural Variables” hasn’t changed, too.
H/T to Fred.
UPDATE (October 15 @ 5:40PM):
After I posted the above, I found that Dr. Geert Jan van Oldenborgh had emailed me to notify me of the correction. I have received his permission to reproduce his email:
Dear Bob Tisdale,
please note that NODC discovered that they had accidentally posted the wrong version of their last file (apr-jun2009), a preliminary version with most data still missing had somehow made it to their web site. A quick look at the map for that quarter showed that there were hardly any anomalies visible and big anomalies in the North Atlantic and Pacific did not persist from the previous quarter, so the data were clearly suspicious. This mix-up has been fixed tonight (Dutch time) at NODC and in the Climate Explorer. A corrected version of the average heat content is attached, the value of apr-jun2009 is now more in line with the values of previous quarters.
Greetings from chilly Holland,