By Dr. Joel N. Myers, AccuWeather Founder and CEO writes Throwing cold water on extreme heat hype. Excerpts in italics with my bolds H/T John Ray
A story came to my attention recently that merited comment. It appeared in London’s The Telegraph, and was headlined, “Give heat waves names so people take them more seriously, say experts, as Britain braces for hottest day
The story’s leaping-off point was a press release from the London School of Economics (LSE), which noted, “A failure by the media to convey the severity of the health risks from heat waves, which are becoming more frequent due to climate change, could undermine efforts to save lives this week as temperatures climb to dangerous levels.” .” Is it time to start naming deadly heatwaves?
It added, “So how can the media be persuaded to take the risks of heat waves more seriously? Perhaps it is time … to give heat waves names [as is done] for winter storms.”
We disagree with some of the points being made.
First, and most important, we warn people all the time in plain language on our apps and on AccuWeather.com about the dangers of extreme heat, as well as all hazards. Furthermore, that is the reason we developed and patented the AccuWeather RealFeel® Temperature and our recently expanded AccuWeather RealFeel® Temperature Guide, to help people maximize their health, safety and comfort when outdoors and prepare and protect themselves from weather extremes. The AccuWeather RealFeel Temperature Guide is the only tool that properly takes into account all atmospheric conditions and translates them into actionable behavior choices for people.
Second, although average temperatures have been higher in recent years, there is no evidence so far that extreme heat waves are becoming more common because of climate change, especially when you consider how many heat waves occurred historically compared to recent history.
After June 2019 was recognized by a number of official organizations as the hottest June on record, July may have now been the hottest month ever recorded. That’s according to the Copernicus Centre for Climate Studies (C3S), which presented its data sets with the announcement that this July may have been marginally hotter than that of 2016, which was previously the hottest month on record.
New York City has not had a daily high temperature above 100 degrees since 2012, and it has had only five such days since 2002. However, in a previous 18-year span from 1984 through 2001, New York City had nine days at 100 degrees or higher. When the power went out in New York City earlier this month, the temperature didn’t even get to 100 degrees – it was 95, which is not extreme. For comparison, there were 12 days at 95 degrees or higher in 1999 alone.
Kansas City, Missouri, for example, experienced an average of 18.7 days a year at 100 degrees or higher during the 1930s, compared to just 5.5 a year over the last 10 years. And over the last 30 years, Kansas City has averaged only 4.8 days a year at 100 degrees or higher, which is only one-quarter of the frequency of days at 100 degrees or higher in the 1930s.
Here is a fact rarely, if ever, mentioned: 26 of the 50 states set their all-time high temperature records during the 1930s that still stand (some have since been tied). And an additional 11 state all-time high temperature records were set before 1930 and only two states have all-time record high temperatures that were set in the 21st century (South Dakota and South Carolina).
So 37 of the 50 states have an all-time high temperature record not exceeded for more than 75 years. Given these numbers and the decreased frequency of days of 100 degrees or higher,
it cannot be said that either the frequency or magnitude of heat waves is more common today.
Climate scientist Lennart Bengtsson said. “The warming we have had the last 100 years is so small that if we didn’t have meteorologists and climatologists to measure it we wouldn’t have noticed it at all.”
via Science Matters
August 14, 2019 at 10:20AM