https://www.forbes.com/sites/doronle.../#7592de686945
(part one)
Global warming and post apocalyptic future. Climate change and melting of glaciers. Statue of Liberty collapses under water and new New York city skyline on an artificial island. Perhaps the catastrophic predictions are overblown.
The U.S. auto industry and regulators in California and Washington appear deadlocked over stiff Obama-era fuel-efficiency standards that automakers oppose and the Trump administration have vowed to roll back – an initiative that has environmental activists up in arms.
California and four automakers favor compromise, while the Environmental Protection Agency (EPA) supports the president’s position that the federal standards are too strict. The EPA argues that forcing automakers to build more fuel efficient cars will make them less affordable, causing consumers to delay trading older, less efficient vehicles. Complicating matters is California’s authority to create its own air quality standards, which the White House vows to end.
However the impasse is resolved, the moment looks ripe to revisit the root of this multifactorial dustup: namely, the scientific “consensus” that CO2 emissions from vehicles and other sources are pushing the earth to the brink of climate catastrophe.
In a modest office on the campus of Jerusalem’s Hebrew University, an Israeli astrophysicist patiently explains why he is convinced that the near-unanimous judgments of climatologists are misguided. *Nir Shaviv, chairman of the university’s physics department, says that his research and that of colleagues, suggests that rising CO2 levels, while hardly insignificant, play only a minor role compared to the influence of the sun and cosmic radiation on the earth’s climate.
“Global warming clearly is a problem, though not in the catastrophic terms of Al Gore’s movies or environmental alarmists,” said Shaviv. “Climate change has existed forever and is unlikely to go away. But CO2 emissions don’t play the major role. Periodic solar activity does.”
Shaviv, 47, fully comprehends that his scientific conclusions constitute a glaring rebuttal to the widely-quoted surveys showing that 97% of climate scientists agree that human activity – the combustion of fossil fuels – constitutes the principle reason for climate change.
“Only people who don’t understand science take the 97% statistic seriously,” he said. “Survey results depend on who you ask, who answers and how the questions are worded. *In any case, science is not a democracy. Even if 100% of scientists believe something, one person with good evidence can still be right.”
History is replete with lone voices toppling scientific orthodoxies. Astronomers deemed Pluto the ninth planet – until they changed their minds. Geologists once regarded tectonic plate theory, the movement of continents, as nonsense. Medicine were 100% certain that stomach (ulcers) resulted from stress and spicy food, until an Australian researcher proved bacteria the culprit and won a Nobel Prize for his efforts.
Lest anyone dismiss Shaviv on the basis of his scientific credentials or supposed political agenda, consider the following: He enrolled at Israel’s Technion University – the country’s equivalent of MIT – at the age of 13 and earned an MA while serving in the Israel Defense Force’s celebrated 8200 Intelligence unit. He returned to Technion, where he earned his doctorate, afterward completing post-doctoral work at California Institute of Technology and the Canadian Institute for Theoretical Astrophysics. He also has been an Einstein Fellow at The Institute for Advanced Study in Princeton.
In other words, he knows tons more about science than Donald Trump or Al Gore.
As for politics “in American terms, I would describe myself as liberal on most domestic issues, somewhat hawkish on security,” he said. Nonetheless, the Trump administration’s position on global climate change, he said, is correct insofar as it rejects the orthodoxy of the United Nations Intergovernmental Panel on Climate Change (IPCC). The IPCC’s findings and conclusions are updated every six years; the latest report, released this week, noted that deforestation and agribusiness are contributing to CO2 emissions and aggravating climate change.
In 2003, Shaviv and research partner Prof. Jan Veizer published a paper on the subject of climate sensitivity, namely how much the earth’s average temperature would be expected to change if the amount of CO2 in the atmosphere is doubled. *Comparing geological records and temperature, the team came up with a projected change of 1.0 to 1.5 degrees Celsius – much less than the 1.5 to 4.5 degree change the IPCC has used since it began issuing its reports. The reason for the much wider variation used by the IPCC, he said, was that they relied almost entirely on simulations and no one knew how to quantify the effect of clouds – which affects how much radiant energy reaches the earth – and other factors.
“Since then, literally billions have been spent on climate research,” he said. Yet “the conventional wisdom hasn’t changed. The proponents of man-made climate change still ignore the effect of the sun on the earth’s climate, which overturns our understanding of twentieth-century climate change.”
He explained: “Solar activity varies over time. A major variation is roughly eleven years or more, which clearly affects climate. This principle has been generally known – but in 2008 I was able to quantify it by using sea level data. *When the sun is more active, there is a rise in sea level here on earth. Higher temperature makes water expand. *When the sun is less active, temperature goes down and the sea level falls – the correlation is as clear as day.
(part two follows)