My new script for scraping KNMI model makes it very convenient to look at model data without a lot of setup overhead. Up till now, I’d only downloaded air temperature data (tas) and I tested downloading SST data (tos). KNMI’s collection of tos data is unfortunately quite spotty and this information is not consistently available. I don’t know whether this is incompleteness on their part or at PCMDI (from which they derive their data) or on the part of the contributors.
For example the cccma_cgcm3_1 model has 5 20c3m runs with tas (air) values but only one with tos (SST) values. Here’s a plot of the difference between tas (masked to sea only) and tos for the overlapping run. For some reason, the model air temperature over the ocean has increased relative to the SST during the 20th century.
Figure 1. Difference between TAS and TOS. Dotted red are major volcanos.