Another example from Roger Pielke sr's  Climate Science.  Roger Pielke writes:

The IPCC SPM writes on page 8,

“Mid-latitude westerly winds have strengthened in both hemispheres since the 1960s.”

This is perhaps the most astonishing claim made in the report. First, peer reviewed papers that have investigated this subject,

Pielke, R.A. Sr., T.N. Chase, T.G.F. Kittel, J. Knaff, and J. Eastman, 2001: Analysis of 200 mbar zonal wind for the period 1958-1997. J. Geophys. Res., 106, D21, 27287-27290.

did find a

“….tendency for the 200 mbar winds to become somewhat stronger at higher latitudes since 1958.”

However, what this means from basic meteorology, is that if the mid-latitude westerlies increase, this indicates a greater north-south tropospheric temperature gradient! This is why the westerlies are stronger in the winter; the troposphere becomes very cold at the higher latitudes, but the tropospheric temperatures change little in the tropics. Thus a statement that the westerlies have become stronger, in the absence of significant warming in the tropical latitudes, indicates a colder troposphere at higher latitude on average.

There is, therefore, an inconsistency in the IPCC SPM. It cannot both be the case that the troposphere in the arctic is warming high while the westerlies in the midlatitudes are increasing in speed. There is a fundamental inconsistency in these trends, which goes unaddressed by the IPCC.