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A swirling Eastern Pacific Ocean storm system headed for California is seen in an image from NOAA A swirling Eastern Pacific Ocean storm system headed for California is seen in an image from NOAA's GOES-West satellite taken at 0930 EST (1430 GMT) February 28, 2014. REUTERS/NASA/NOAA/Handout  

NOAA Reinstates July 1936 As The Hottest Month On Record

Watts’ accusation of NOAA climate data manipulation comes after reports that the agency had been lowering past temperatures to create a warming trend in the U.S. that does not exist in the raw data.

The ex-post facto data manipulation has been cataloged by climate blogger Steven Goddard and was reported by the UK Telegraph earlier this month.

“Goddard shows how, in recent years, NOAA’s US Historical Climatology Network (USHCN) has been ‘adjusting’ its record by replacing real temperatures with data ‘fabricated’ by computer models,” writes Christopher Booker for the Telegraph.

“The effect of this has been to downgrade earlier temperatures and to exaggerate those from recent decades, to give the impression that the Earth has been warming up much more than is justified by the actual data,” Booker writes. “In several posts headed ‘Data tampering at USHCN/GISS,’ Goddard compares the currently published temperature graphs with those based only on temperatures measured at the time.”

“These show that the US has actually been cooling since the Thirties, the hottest decade on record; whereas the latest graph, nearly half of it based on ‘fabricated’ data, shows it to have been warming at a rate equivalent to more than 3 degrees centigrade per century,” Booker adds.

When asked about climate data adjustments by the DCNF back in April, NOAA send there have been “several scientific developments since 1989 and 1999 that have improved the understanding of the U.S. surface temperature record.”

“Many station observations that were confined to paper, especially from early in the 20th century, have been scanned and keyed and are now digitally available to inform these time series,” Deke Arndt, chief of NOAA’s Climate Monitoring Branch, told TheDCNF.

“In addition to the much larger number of stations available, the U.S. temperature time series is now informed by an improved suite of quality assurance algorithms than it was in the late 20th Century,” Deke said in an emailed statement.

But NOAA has apparently not just been adjusting temperatures downward, but also adjusting them upwards.

“This constant change from year to year of what is or is not the hottest month on record for the USA is not only unprofessional and embarrassing for NOAA, it’s bullshit of the highest order,” Watts wrote. “It can easily be solved by NOAA stopping the unsupportable practice of adjusting temperatures of the past so that the present looks different in context with the adjusted past and stop making data for weather stations that have long since closed.”

NOAA did not immediately respond to TheDCNF’s request for comment.

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