The IPCC appears to be ready to make the same presentation of climate model failures as they have in past reports. Figure SPM.5 from the leaked draft of the Summary for Policymakers for the IPCC’s 5th Assessment Report shows the same fatally flawed tactic of presenting model simulations based on only natural (solar and volcanic aerosol) forcings versus those based on anthropogenic and natural forcings. It looks as though the IPCC is content with highlighting the models’ failures to properly simulate natural coupled ocean-atmosphere processes that can cause surface temperatures to warm — or to stop that warming without notice.
Figure SPM.5 from the leaked draft of the Summary for Policymakers for the IPCC’s 5th Assessment Report
Larger copy is here.
Additionally, note the (blue) ocean heat content graphs. They’re showing ocean heat content data for the Southern Ocean as far back as the 1970s, yet there are only a handful of temperature and salinity samples at depth there before the start of the ARGO era in 2003. Consider this too: there are only a few sea surface temperature measurements in the Southern Ocean before the satellite era of sea surface temperature data, which started in 1982. Altogether, there is little observations-based ocean temperature data before those benchmarks in the Southern Hemisphere, south of about 30S.
And I’m sure you can find other flaws in that bogus illustration.
Once again, the IPCC is presenting misleading illustrations. No surprise there.