US Climate Reference Network Shows Cooling
What is the Climate Reference Network USCRN?
One of the principal conclusions of the 1997 Conference on the World Climate Research Programme was that the global capacity to observe the Earth’s climate system is inadequate and deteriorating worldwide and “without action to reverse this decline and develop the GCOS [Global Climate Observing System] , the ability to characterize climate change and variations over the next 25 years will be even less than during the past quarter century” (National Research Council [NRC] 1999).
In spite of the United States being a leader in climate research, long term U.S. climate stations have faced challenges with instrument and site changes that impact the continuity of observations over time…
NOAA’s response to the NRC concerns is the USCRN, a network of stations deployed across the continental U.S.
And what has been the trend at USCRN stations over the last 15 years? (4/2007 – 4/2022)
That would be a total cooling of 15 years * -0.027934 °C/year =~ 0.42 °C averaged across all 98 stations that have consistent data going back to 4/2007.
Breakdown by station, in units: °C/year
Editor’s note: there follows a long list of station records, 98 lines. See the source document
Only 23 out of 98, that is, ~23.5% show a warming trend.
But there is more!
The nice thing about these stations is that they not only provide air temperature data, but most are also equipped with sensors to measure surface temperature. The results are even more dramatic at the 92 sites with persistent IR surface data:
That would be a total cooling of 15 years * -0.084043 °C/year =~ 1.26 °C averaged across all 92 stations that have consistent surface data going back to 4/2007.
Breakdown by station, in units: °C/year
Editor’s note: there follows a long list of station records, 92 lines. See the source document.
Only 11 out of 92, that is, ~12 percent show a warming trend.
Now this is important: I’m not saying that the US has cooled over the last 15 years. All I’m saying is that the newest and best stations suggest this. You decide the significance of this.
Update 06/07:
If we break up CRN data by years, this is what we get:
Year 0 is 2007/5 to 2008/4 (inclusive), and Year 14 is 2021/5 to 2022/4 (inclusive)
The last 8 years show a definite COOLING trend for air temperature.
The last 12 years show a definite COOLING trend for surface temperature.
See more here: phzoe.com
Some bold emphasis added
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Geraint HUghes
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Very interesting study, well done.
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Lemmonee
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Interesting, thank you for show us the data.
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John
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If I recall correctly, the USCRN started putting out data in 2004. It would be good to see a graph starting from then. Starting from 2007 could look like cherry picking.
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Zoe Phin
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It is cherrypicking. I picked exactly 15 years of cherries.
They have data going back to 2002. Too few stations existed in 2004.
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John
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Thanks, Zoe.
If you did look back further, would it still show a cooling trend?
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Zoe Phin
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No.
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Moffin
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You could get a job with NASA then.
You done good with your two articles. (English translation .’have done well’)
What ever happened to Geran?
LOL@Klimate Katastrophe Kooks
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Zoe,
Do the stations record data sufficient to plot the trend of enthalpy, rather than just temperature?
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Mark Tapley
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Everyone should realize that there are lots of ways to get false high readings. All they have to do is put more of the probes in warmer areas and take out some of those sampled in colder areas. Of course they could also just calibrate the sensors on the high side. The Club of Rome and their flunkies at NOAA want higher temperatures. No problem.
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