Category Archives: IPCC

The IPCC Southern Hemisphere Reconstructions

A question for readers: which of the following proxies are used to reconstruct past Southern Hemisphere temperature in the IPCC’s graphic (Figure 5.7b) showing SH reconstructions: 1. Graybill’s California strip-bark bristlecone chronologies 2. upside down and contaminated Finnish lake sediments 3. European instrumental temperature data 4. Antarctic ice core d18O isotope data covering the medieval […]

Fixing the Facts 2

AR5 Second Order Draft (SOD) Figures 1.4 and 1.5 showed the discrepancy between observations and projections from previous assessment reports. SOD Figure 1.5 (see below as annotated) directly showed the discrepancy for AR4 without additional clutter from earlier assessment reports. Even though AR4 was the most recent and most relevant assessment report, SOD Figure 1.5 […]

Marotzke’s Broken Promise

A few days ago, Jochem Marotzke, an IPCC Coordinating Lead Author and, according to Der Spiegel, “president of the German Climate Consortium and Germany’s top scientific representative in Stockholm”, was praised (e.g. Judy Curry here) for his promise that the IPCC would address the global warming hiatus “head on” despite pressures from green factions in […]

Two Minutes to Midnight

There is much in the news about how IPCC will handle the growing discrepancy between models and observations – long an issue at skeptic blogs. According to BBC News, a Dutch participant says that “governments are demanding a clear explanation” of the discrepancy. On the other hand, Der Spiegel reports: German ministries insist that it […]

IPCC and the end of summer

Though I haven’t posted for a while, I’ve done quite a bit of work on climate recently, though it hasn’t been the sort of work that lends itself readily to blog posts. I made a presentation at a workshop session in Erice in the third week of August, which, at Chris Essex’ request, was entitled […]

IPCC Check Kites Gergis

A few days ago, WUWT pointed out that the American Meteorological Society webpage showed that the Gergis et al paper had been officially “withdrawn”. However, readers should know better than to presume that this would have any effect on IPCC use of the reconstruction. The withdrawal of the Gergis article hasn’t had the slightest impact […]

The Afterlife of IPCC 1990 Figure 7.1

At Lewandowsky’s blog here, conspiracy theorist John Mashey has challenged Deming’s “get rid of the MWP” recollection claiming that: Nobody in 1995 would have been worried about “getting rid of the MWP,” although they might have wanted to dispel the idea the Lamb schematic was Truth. They had years before abandoned the schematic… Anyone citing […]

Will Stocker Retaliate against the U.S?

On August 3, I discussed the progress of David Holland’s efforts to overcome obstruction by the University of East Anglia and the IPCC to a request under UK Freedom of Information legislation for a secret letter from Thomas Stocker to, among others, lead authors of IPCC AR4. I observed that many of the recipients of […]

More on the Iconography of IPCC 1990 Figure 7

As a mild break from Lewandowsky’s fake data and false results, I am going to revisit IPCC 1990 Figure 7, which I discussed in several Climate Audit posts from 2005-2008 – a topic that was raised at Lewandowsky’s blog by conspiracy theorist John Mashey, who, rather than confronting the problems of Lewandowsky’s use of fake […]

IPCC Refuses to Correct Errors

Pielke Jr has an interesting post about more IPCC nonsense. He made four proposed error corrections to IPCC, all of which were refused. Which is the worst refusal is a bit of a beauty contest. On balance, I think that my favorite is their reason for refusing to correct an inaccuracy in an IPCC press […]


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