Links tagged “tornados”

New peer-reviewed study in journal Environmental Hazards by Dr. Roger Pielke, Jr. -  Economic “Normalization” of Disaster Losses 1998-2020: A Literature Review and Assessment

"A few years in the making, a robust peer review process": "A very strong, bottom-line conclusion across the normalization literature is that evidence signal of human-caused climate change in the form of increased global economic losses from more frequent or more intense weather extremes has not yet been detected."

Dr. Roger Pielke Jr.: " Of these 54 studies:
53 focus on weather or climate
39 find no trends after normalization
8 find decreasing trends
5 find increasing
1 finds mixed trends

May is typically the most tornadic month in the U.S., averaging 272 tornadoes each year between 1999 and 2018. But as of May 25, only 49 tornadoes had been confirmed throughout the month, according to Evan Bentley, a severe weather meteorologist at NOAA's Storm Prediction Center (SPC).

Only 49 tornadoes have been confirmed in the U.S. so far this May.

The last May to have fewer than 100 tornadoes was in 1970.

Professor Ole Humlum, formerly of the University of Oslo, Norway points out that new data on rising ocean temperatures raise interesting questions about the source of the heat. “We can detect a great deal of heat rising from the bottom of the oceans. This obviously cannot be anything to do with human activity. So although people say the oceans are warming, in reality there is still much to learn.”

'Since 1979, Arctic and Antarctic sea-ice extents have had opposite trends, decreasing and increasing, respectively.'

'Tropical storms and hurricanes...no overall trend towards either lower or higher activity. The same applies for the number of continental hurricane landfalls in the USA, in a record going back to 1851.'

"Northern Hemisphere snow cover extent...since 1972, however, snow extent has been largely stable."

Rule Number One: Any model used in an event attribution study to quantify a linkage (weasel word) between climate change a specific extreme event should also produce accurate historical climate trends associated with the relevant phenomena. The claim that rainfall from Hurricane Florence was boosted 50% by climate change should have raised immediate doubts because observations have not shown an increase in rainfall related to landfalling hurricanes. Any event attribution study that cannot accurately replicate historical trends using the same model and methods is clearly fatally flawed...

Rule Number Two: All event attribution studies should be preregistered, which means “committing to analytic steps without advance knowledge of the research outcomes.” All methodological choices should be made transparent in advance of any event attribution study and submitted to an independent registry...

Rule Number Three: All event attribution studies should integrate their findings with the traditional approach to detection and attribution of the IPCC. Event attribution studies often result is what is called “attribution without detection.”...

Individual event attribution studies are here to stay. They fill a strong demand in advocacy and in politics. Meeting such demand should be fully compatible with basic standards of scientific quality. For event attribution studies to be conducted with the highest degree of rigor they should (1) demonstrate consistency with historical observations, (2) be the product of preregistered studies, and (3) be fully integrated with the conventional methodologies of the IPCC. Until event attribution studies meet these basic rules, they will better serve purposes of advocacy rather than science.