More IPCC Falsehoods: Source of Claims Global Warming Caused US Tornadoes

Recent severe weather in the US triggered claims they”re proof of human-caused global warming. This is scientific nonsense. Whoever makes the claim is demonstrating ignorance of climate science. Unfortunately, most are repeating the false science of the Intergovernmental Panel on Climate Change (IPCC) who incorrectly predicted severe weather increases because of warming. Cooling, not warming, caused current severe spring weather. Records show that current weather extremes are well within long-term natural variability. Notice the events equaled conditions in 1974 – and that was a period of cooling.

Robert Frost said, “There’s nothing I am afraid of like scared people.” Those who perpetrated possibly the greatest deception in human history that CO2 is causing global warming/climate change are scared. Events are driving them to extreme, unsubstantiated, and even ridiculous claims and threats.

So they return to their central theme of convincing you that normal weather events are abnormal. An increase in severe weather is a persistent theme, especially in North America. Recently the U.S. Climate Change Science Program and the Subcommittee on Global Change Research issued a report with projected changes in weather and climate extremes in North America and U.S. territories.

Report co-chair Tom Karl, Ph.D., director of the National Oceanic and Atmospheric Administration (NOAA) National Climatic Data Center in Asheville, N.C said,

This report addresses one of the most frequently asked questions about global warming: what will happen to weather and climate extremes? This synthesis and assessment product examines this question across North America and concludes that we are now witnessing and will increasingly experience more extreme weather and climate events.

He cites the Intergovernmental Panel on Climate Change (IPCC) as the authoritative body, which is not surprising because he was a lead author for the (IPCC) Reports for 1990, 1992, 1995, a Coordinating Lead Author and panel member of the 2001 Report and a Review Editor for Chapter 3 of the 2007 Report.

Most severe weather occurs in the middle latitudes approximately between 30° and 65° of latitude. Cyclonic storms, blizzards, severe thunderstorms and tornadoes form where warm and cold air meet, which is most dramatic along the boundary generally known as the Polar Front (shown in Figure 1).

Polar front

Figure 1: Polar Front

The pattern is confirmed by the general tornado zones in Figure 2.

General Tornado Zones

Figure 2: General tornado zones

Temperature contrast across the Polar Front is the greatest change in a short distance in each hemisphere. This creates the strongest winds as illustrated by the location of the casino spiele Jet Stream (more correctly called the Circumpolar Vortex) above the surface. It also means the formation of swirling low-pressure systems or cyclones that in winter are blizzards. As the cold air advances it pushes up unstable bubbles of warm air to create heavy rain from large clouds. With enough force these can develop in to severe thunderstorms (cumulonimbus) and under certain conditions trigger tornadoes. These conditions occur most frequently across the central US in what is colloquially known as Tornado Alley.

Tornado activity in the U.S.

Figure 3: Tornado activity in the U.S.

The NOAA graph shows that severe tornadoes were higher in the period from 1950 to 1975. Global temperatures were falling during that time.

Since then, frequency has decreased as the world warmed to 2000. The world has cooled since severe weather has increased.

Number of strong to violent tornadoes U.S. 1950-2005

Figure 4

IPCC Reports claim increased CO2 levels will increase polar air temperature more than the tropical air. This decreases the temperature contrast across the Polar Front and results in fewer storms and less severe weather.

The trend of severe weather will likely increase as the Earth continues to cool. IPCC and their disciples will claim it proves them right. They will continue their practice of claiming natural events as unnatural. Unless people understand the basic science they will continue the fraud and pressure politicians into even more damaging energy and environmental policies.

It”s time to completely dissolve the IPCC and pull all climate research funding from national weather agencies. No information is better than falsehoods.

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