90 Miles From Tyranny : Media Touts ‘Clear Sign of Human-Caused Climate Change.’ Here Are the Facts.

Wednesday, March 20, 2019

Media Touts ‘Clear Sign of Human-Caused Climate Change.’ Here Are the Facts.


Associated Press reporter Seth Borenstein has made another attempt to convince the public of global warming, but his latest analysis has climate scientists once again refuting his claims.

On Tuesday, Borenstein cited AP analysis that found hot temperature records in the U.S. were being broken twice as often as cold temperature records. He concluded that this is “a clear sign of human-caused climate change.”

Borenstein wrote:

The AP looked at 424 weather stations throughout the Lower 48 states that had consistent temperature records since 1920 and counted how many times daily hot temperature records were tied or broken and how many daily cold records were set. In a stable climate, the numbers should be roughly equal. Since 1999, the ratio has been two warm records set or broken for every cold one. In 16 of the last 20 years, there have been more daily high-temperature records than low.
He went on to cite various climate scientists:

The AP shared the data analysis with several climate and data scientists, who all said the conclusion was correct, consistent with scientific peer-reviewed literature and showed a clear sign of human-caused climate change. They pointed out that trends over decades are more robust than over single years.

He concluded:
The analysis stopped with data through 2018. However, the first two months of 2019 are showing twice as many cold records than hot ones.
But the scientists he cited don’t speak for all climate scientists. Some, in fact, are dismissing his “clear sign” analysis.

Climatologist John Christy told me that Borenstein framed the data wrongly:
The occurrence of both record highs and record lows is declining. Record-low events are simply declining more rapidly than record highs. The drop in record lows is associated with development around the weather stations, which causes low temperatures to increase more than highs for a variety of reasons.

Most climate change activists cite the greenhouse gas theory—that man-made gases are causing changes to the Earth’s temperature. Christy noted that this theory predicts an increase in frequency of record-breaking temperatures. Yet the exact opposite is happening in the U.S.—the frequency of those temps is declining.

The cause? Christy says it’s likely “urbanization and natural variability.”

He added: “I’ve actually done this same analysis for the 682 [U.S. Historical Climatology Network] stations with at least 105 years of record since 1895. It is clear that the occurrence of both record high and record lows has declined since 1895, thanks to many records set from the 1920s to 1954.”

He continued:
The AP … is spinning the story by only noting that record lows are fewer than highs now—but the real story is that in the U.S., both extremes are falling. This is consistent with the decline in...




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