No more room for doubt: global warming is clearly linked with greenhouse gas emissions
Current global warming is unique in history, and parallels greenhouse gas emissions - climate change short science news

The average temperature on earth has risen faster than ever in the last 150 years. This is apparent from three new studies, recently published in the scientific journals Nature Geoscience and Nature. The researchers call the current warming unusual.

The scientists reconstructed the climate of the last 2000 years. The data showed that the average temperature on earth increased by 1 degree since 1850.

For the reconstruction all available climate data were collected from the beginning of our era to the present. The researchers used not only direct measurements for this, but also corals, old ice layers, shells, annual rings and sediment. On the basis of tree growth rings, for example, you can also see whether a certain period has been dry, hot, wet or cold.

Before 1850, cold and warm peaks were mainly at the regional level. But the new research shows that the temperature rise has since 1850 applies to 98 percent of the world. It is for the first time in history that it is getting warmer almost everywhere.

The period in Europe between the 16th and 19th centuries is called the Little Ice Age. At that time the temperature was much lower than during the medieval warm period, the centuries before.

The group of researchers now concludes that the falling temperature in the Little Ice Age was partly due to volcanic eruptions. In the beginning of the 19th century, there were a number of major eruptions, for example from the Indonesian Tambora volcano in 1815. Even lower temperatures were the result.

The new studies remove the last doubt, for example, about what happened in the period before 100 years ago. The Little Ice Age is often used by climate skeptics as an argument that it then suddenly became colder and that it can now happen again.

The results show that climate trends over the past 2000 years have never been as strong as they are now. These studies clearify the huge differences between the natural and current climate.

After the series of volcanic eruptions in the 19th century, a period of recovery followed. And immediately after that the Industrial Revolution started. That period caused an increase in greenhouse gas emissions.

In summary, the new studies take away the arguments of climate skeptics. First, the current warming is truly unique, starting with the industrial revolution in 1850. Second, unlike warming events in the past, current warming affects our entire planet, i.e. it is for the first time a global phenomenon. And third, the climate models, often criticzed by climate skeptics, that are being used to reconstruct past temperatures and to predict how far the Earth will warm up appear to be pretty accurate, correctly estimating the real temperature for more than 99% of the time.

There is no doubt about it. Science has proven that global warming is real, unique to the post-industrialization era, and paints a picture of a planet that has taken a path to a new, warm, global climate.



Scientific publication: Nature Geoscience
Scientific publication: Nature

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