NASA’s 2021 ‘hottest year’ Claim Busted

Written by climatedepot.com on January 26, 2022. Posted in Current News

NASA GISS, UK Met Office, RSS and UAH, all show global temps declining since 2016. 2021 shows an ‘imperceptible 0.134C warmer than the 30-year average’

MIT climate scientist Dr. Richard Lindzen:

“If you can adjust temperatures to 2/10ths of a degree, it means it wasn’t certain to 2/10ths of a degree.” – “We’re talking about less than a tenth of degree with an uncertainty of about a quarter of a degree.

Moreover, such small fluctuations—even if real—don’t change the fact that the trend for the past 20 years has been much less than models have predicted.”

NOAA published its global climate report for year end 2021 highlighting that its global temperature anomaly measurements showed 2021 being the sixth highest of its recorded measurements.

NOAA’s global annual measurement for 2021 was 0.84 degrees C. NOAA has exaggerated the importance of both monthly and annual temperature anomaly changes with as small a difference as +0.01 degrees C as a basis for claiming “hottest temperature ever”, as was done for the July 2021 temperature anomaly data, even though the confidence level for this measurement is +/-0.19 degrees C as discussed in WUWT articles here and here.

More than 1/3rd of the monthly temperature anomaly measurements between 1992 and 2021 were adjusted upward by 0.01 degrees C between NOAA’s August and November temperature anomaly update releases.

These large numbers of constantly on-going upward adjustments result in increasing changes in reported data values, with for example the highest annual global temperature anomaly measurement as reported originally for year-end 2016 increasing from 0.94 degrees C to 0.99 degrees C in the year-end 2021 report.

In addition to NOAA’s global temperature anomaly decline since year end 2016, all other global temperature anomaly measurement systems used by climate scientists worldwide all show declining global temperature anomaly measurements during the period from 2016 through 2021, as shown in the graphs below for surface global temperature anomaly measurement systems from NASA GISS and UK Met Office and for satellite global temperature anomaly measurement systems from UAH and RSS respectively.

RSS

UAH

HADCrut

GIStemp

Despite the usual climate alarmist grossly exaggerated hype by NOAA and NASA in their year 2021 annual reports, trying to conceal the clearly obvious downward global temperature anomaly measurement trends, while global atmospheric CO2 levels are continuing to climb, the annual global temperature anomaly outcomes for year-end 2021, and the last six years, do not support and in fact clearly dispute recent climate alarmist claims that we are in a “climate emergency” driven by man-made CO2 emissions.

“The annual average anomaly for 2021 was +0.134 deg. C above the 30-year mean (1991-2020), which places it as the 8th warmest year in the 43 year satellite record, behind 2016, 2020, 1998, 2019, 2017, 2010, and 2015.”

Paul Homewood:

“It is those computer models that dictated UN climate policies, based on ludicrous projections of rapid warming. In reality, the amount of warming since 1979 has been tiny. Indeed, when you factor in margins of error, there has been no statistically significant warming since 1998.

You might also note that the satellite data begins in 1979, which just so happens to be the coldest period of the 20th Century. At the time it was acknowledged that global temperatures had decline by 0.5C since 1940, which offsets most of the increase since 1979. This decline in temperatures coincides with the cold phase of the Atlantic Multidecadal Oscillation, which has been in warm phase since the 1990s and is soon due to revert to cold.”

Mark Hodgson:

“I think this is what is called spin. 2021 must have been a disappointment for climate worriers keen to ratchet up panic and demands for ever-more urgent action to reduce ‘greenhouse gas’ emissions.” The headline “Europe experiences average temperatures during the winter and spring and a year of temperatures outside the ten warmest years” didn’t fit the bill.

Jo Nova:

Magical seven-year record wins the Hottest-ever Bingo of 2021. Why does “seven years” suddenly matter? “The last 500 years has been the coldest of the last 5,000.” -“Two can play Climate Bingo. In the history of human civilization, we’ve never lived through six centuries that were colder than the last six. Maybe that’s more important than a 7-year hot record in the “blip” at the end?”

Here, Tony Heller does his usual competent job of setting the record straight:

See more here: climatedepot.com

Header image: PNG Egg

Bold emphasis added

Editor’s note: It should not be forgotten that the modern satellite temperature record only began in 1979, and thermometers began to be used in the 1880’s in the US and 1659 in England, so claims of hottest year on record, which is deliberately phrased so the gullible will think this means forever, actually means the hottest year since records began in 1659. The Central England Temperature Record, which is the longest continuously-monitored in the world, began in 1659, and shows an average temperature increase over the last 360 years of 1.3C, as shown below.

The other two temperature records are the ice cores from Greenland & Antarctica, which go back 800,000 years, and the deep ocean sediment record, which stretches back some 600 million years. Therefore, claims that July 2021 was the ‘hottest ever’ can be shown to be absolute nonsense.

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