US Climate Reference Network Shows Cooling

Written by Zoe Phin on June 10, 2022. Posted in Current News

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.

– Why CRN is Needed

Where is USCRN data? here.

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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