As a companion to yesterday’s submit, listed below are the 1981-2010 normals for the temperature aloft at Barrow, as noticed by the twice-day by day balloon soundings. The colour scales are the identical as in the Fairbanks plots.

While I’m unable to see a pure rationalization for the trend difference, that the difference is mainly seen within the first 20 years suits to the speculation that the siting high quality of the compliant stations was worse previously: that in the past these stations had been less compliant and a bit too warm. The further you go back in time, the extra possible it turns into that some change has happened. And the further you return in time, the extra seemingly it is that this alteration is not identified.

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