Surface Temperature Records: Policy Driven Deception?

The Science and Public Policy Institute (SPPI) has released a new study by Joe D’Aleo and Anthony Watts, Surface Temperature Records: Policy Driven Deception?

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From SPPI (with emphasis added):

Authors veteran meteorologists Joe D’Aleo and Anthony Watts analyzed temperature records from all around the world for a major SPPI paper, Surface Temperature Records – Policy-driven Deception? The startling conclusion that we cannot tell whether there was any significant “global warming” at all in the 20th century is based on numerous astonishing examples of manipulation and exaggeration of the true level and rate of “global warming”.

That is to say, leading meteorological institutions in the USA and around the world have so systematically tampered with instrumental temperature data that it cannot be safely said that there has been any significant net “global warming” in the 20th century.

From their Summary for Policymakers (catchy title there guys):

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Robert Ferguson, President of SPPI, said: “The entire case for alarm about ‘global warming’ is of course predicated on the assumption that ‘global warming’ has actually occurred. D’Aleo and Watts sampling of horrifying examples of deliberate tampering with the temperature data from all parts of the world raises very serious questions not just about how much ‘global warming’ occurred in the last century but also about whether there was any significant warming at all.

“The serious question now arises: do these transparent data manipulations by self-interested government agents add to cascading revelations of worldwide scientific and financial fraud?

h/t to JoNova and of course Anthony Watts.