It is difficult to know to what degree the general public believes the direst forecasts of climate catastrophe after years of having been endlessly frightened by “expert” predictions that have repeatedly failed to materialize, but one thing is certain: the vast majority of us are not hearing both sides of the debate. With most other big controversies, mainstream news generally allow token counterarguments, at least occasionally. Not in this case. Dissent against the prevailing view that humanity drives “climate change” is essentially off-limits on most of the airwaves and in print. Censorship of the opposition is accepted as good journalistic hygiene. Indeed, the Los Angeles Times proudly declared it would no longer accept letters to the editor that challenged the validity of anthropogenic climate change.
Because they control the narrative, climate alarmists are virtually unchallenged, even when they are demonstrably dishonest. No propaganda has been used more effectively by them than claims that the science is “settled” and that 97% of scientists believe humans are the primary cause of global warming, an idea which originated in this paper. What the alarmists would never confess is that the assertion was quickly debunked by Legates, et. al., who wrote,
"In fact, however, there is a decided lack of consensus among scientists, and especially among those who are trained in climate science or have studied it extensively. The 97.1 % consensus claimed by Cook et al. (2013) turns out upon inspection to be not 97.1% but 0.3 %. Their claim of 97.1 % consensus, therefore, is arguably one of the greatest items of misinformation that has been circulated on either side of the climate debate."
Shamefully, even NASA is trafficking in the myth.
Another especially clever persuasion trick, which attempts to cultivate confirmation bias in the alarmists' audience, is to attribute every category of weather outlier to anthropogenic climate change. For example, "climate change" is blamed for stronger tornadoes and weaker tornadoes, shrinking sea ice and growing sea ice, violent hurricane seasons and quiet hurricane seasons, faster winds and slower winds, too much rain and too little rain, coldwaves and of course, heatwaves. If what we read is to be believed, either end of a range of a weather can only be the result of man-made CO2, rather than an intermittent, but perfectly natural, ancient phenomenon. The hucksters and hysterics have made anthropogenic climate change unfalsifiable. Every unpleasant divergence from mild, seasonal weather, they will swear, confirms our impending doom.
Outside of wonkish blogs, scientifically strong counterarguments to the pervasive misinformation are rare. One merely has to Google "climate change" to see how lopsided the leading links are. When a politician with no scientific training, and a sympathetic child manipulated by her elders for cynical reasons are the public faces of the climate debate, we can be certain that the discussion is closer to political science than actual science. Of course, climate alarmists have tremendous political and financial incentives to continue their crusade, and as long as that's true they're not going away.
The main threat to climate hysteria is the actual scientific data and its proper analysis. A widely accepted global temperature dataset published by the University of Alabama at Huntsville shows only a +0.13 degrees Celsius per decade trend in the monthly anomaly data since 1979. The term “anomaly” refers to the deviation of a month's temperature from a 30-year baseline (average) temperature. The current baseline is the global mean for the period 1981-2010, and the temperatures in the global database are derived from measurements of the microwave emissions of oxygen in the lower troposphere using satellite sensors.
There are a few important notes about these measurements. First, assuming the Earth is approximately four billion years old, these four decades of satellite data represent one-millionth of 1% of geologic time. That is analogous to about three tenths of a second out of an entire year. Drawing important conclusions about Earth’s climate from such a razor-thin sliver of time would be foolhardy. Furthermore, there have been periods of climatic history that have been far warmer and far colder than today, and the fluctuations observed in the recent past may simply be variations of little consequence in a milder middle range. More importantly, the trend line of +0.13 degrees Celsius per decade with respect to a baseline mean implies that we are currently only about a quarter of a degree Celsius – less than half of degree Fahrenheit – over the baseline. In other words, much of the world is freaking out over a short-term average anomaly of a quarter degree Celsius, which could be caused by a large number of variable natural drivers. Popular science will not tell us that.
The professional science literature provides us with both sides, however. Three central questions climate scientists are actively trying to resolve pertain to feedbacks, causality, and model sensitivities. Negative climate feedbacks are mechanisms that cool the Earth or mitigate temperature increase. One of the most notable examples is the “iris effect”, a controversial theory proposed by MIT climate physicist Richard Lindzen and his co-workers, which states that warming water temperatures reduce cirrus cloud formation, resulting in greater heat loss and a net cooling effect. Recent independent research appears to confirm the theory. Studies of climate causalities seek to match observable climate states or outputs, e.g., temperature observations, to one or more inputs (i.e., causes). The main thesis behind anthropogenic climate change is that man-made CO2 is the source of nearly all recent global warming. Using a technique known as slow-feature analysis, researchers have mapped the Pacific Ocean’s El Niño–Southern Oscillation cycle and the Hale sunspot cycle to centuries of temperature records from central England. While central England is not a pure proxy for the world at large, the ability to link such diverse dynamics is a powerful argument that our Earth's thermostat is controlled by natural forces far greater than mankind. Results connecting natural global ocean cycles and regional surface temperatures are not unique. Finally, the effort to relate prescribed climate model sensitivities – parameters that fit theoretical models to empirical data – to global temperature observations has been one of the great disappointments of anthropogenic warming theorists. Princeton physicist Dr. William Happer has written about the CO2 doubling sensitivity, which scales each doubling of atmospheric CO2 concentration to global temperature increase:
The doubling sensitivity S is how much the Earth’s average surface temperature will increase if the atmospheric concentrations of CO2 doubles. S is the most important single parameter in the debate over climate change.
As Happer goes on to note, the doubling parameter has been badly overestimated, and climate scientists have proposed more than fifty mechanisms to explain the discrepancy. Regardless, the theory is flawed, and the science is obviously not settled. Do not hold your breath waiting for the alarmists to admit it.