“Global warming is real, but it is not due to carbon dioxide, but due to increased solar activity in recent years.” This is just one of the common myths about global warming. Physicist Christian Presura explains in detail how much carbon dioxide heats the earth. You can read further in detail InfoClima.rowhere there are also graphics or you can watch a large clip posted on YouTube.

Myths about global warming

1. “Temperature increases have also occurred in the past, so what is present today is also a natural effect.” – WRONGWITH

During the ice ages, the temperature dropped significantly and much of Europe was covered in ice. It is known that these ice ages are associated with the Earth’s orbital movements: eccentricity, axis tilt and precession. These variations change the distribution and intensity of solar radiation on the Earth’s surface, leading to long climatic fluctuations and periods of freezing.

Milankovitch cycles (named after the Serbian explorer) describe fluctuations in average temperature that occur when the Earth’s orbit is more circular or elliptical, when the Earth’s axis is tilted less or more, or when the Earth is closer or farther from the Sun. Together, these effects periodically promote ice growth and cause ice ages.

In this case, the reason is natural: fluctuations in the Earth’s orbital motion. The consequences are twofold: a change in temperature, as well as fluctuations in the concentration of carbon dioxide (at the moment, it is not known exactly which precedes the other).

However, research shows that the two may be related. Thus, due to the increase in temperature (due to the movement of the Earth), the temperature in the oceans also increases. Over time, they remove more carbon dioxide dissolved in its waters, and then the concentration of carbon dioxide in the air also increases. This, in turn, leads to an increase in temperature due to the greenhouse effect, and the initial effect can be amplified.

Today’s increase in carbon dioxide is too great to be natural. For warming, there are models and measurements that suggest that what we are seeing now is the result of the increase in carbon dioxide since the industrial period.

2. “Global warming is real, but it is not due to carbon dioxide, but due to increased solar activity in recent years.” – FAKE

The activity of the Sun waxes and wanes every 11 years; it correlates with the number of sunspots. Fortunately, the number of sunspots has been continuously monitored since the invention of the telescope (Caution, do not look at the Sun through a telescope, you need a special filter). The number of sunspots fluctuated over the years, but generally remained the same.

In addition, we have had accurate measurements of solar radiation for the past 50 years. During this period, solar activity remained constant, fluctuating by about 0.1 percent of its average value, according to NASA. In fact, NASA’s conclusion is that global warming (increased global average temperature) caused by burning fossil fuels is at least 50 times greater than the average change in solar radiation over the past 250 years.

3. “In the 1970s, experts warned of an ice age, now they have turned 180 degrees and are talking about global warming.”

This is partially true, although the number of researchers who warned in the 1970s that the Earth was cooling was exaggerated.

Some researchers speculate that a new ice age may be coming, not yet aware of new measurements that show a sudden increase in temperature.

Why they thought so is clear, because there were graphs of temperature changes over the last 20,000 years, when the Earth came out of the last ice age. The horizontal axis shows time in thousands of years on a logarithmic scale. The temperature increased by almost 4 degrees, but then, in the latest models, it seems to have decreased slightly over the last thousand years.

4. “The climate also warmed in the Middle Ages, and industry could not be to blame for this. And today it’s still a natural increase!” FAKE!

Recent measurements suggest that medieval warming was less than previously thought. Currently, the scientific community still does not agree on the change in global average temperature 1000 years ago.

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