Climate Variations in Earth’s Geological Past vs. Today

Firstly, when we think about climate change today – we dwell on how climate variability impacts upon life and environment conditions. This means that, for instance, it is necessary to look to the past to help understand climate cycles. Secondly, how our current anthropological changes fit into natural development. And, even more, to find solutions on. Despite strong contrasts between today’s world and the original one, it is clear proof of the current and previous repercussion on climate variations.

Climate Variations: Today against the Past

Over the late 20th century, a rapid warming characterised Earth’s geological past. For example, it was more widespread than any temperature fluctuations during the previous 2,000 years. Human beings are one of the main reasons of climate alterations, even though their worries. People who discuss about burning coal, oil and gas highlight climate variations in past centuries to argue and understand today’s higher temperatures:

  • Previous shifts include Medieval Climate Anomaly, from 800 to 1200 AD when temperatures rose;
  • The Little Ice Age from around the 1300s to the 1850s;
  • Pre-industrial fluctuations in temperature were primarily conducted by volcanic activity. To understand climate fluctuations and their link to solar cycles it is vital to interpret climate changes.

These temperature data came from the U.S. National Oceanic and Atmospheric Administration. It is showed that the previouys June has been the hottest globally in 140 years. These study data cover two millennia from almost 700 sources ranging from tree rings and coral to sediments and ice cores.

What Is Anthropogenic Global Warming?

Anthropogenic global warming is a theory (AGWT) of today’s long-terme increase in the average temperature. Earth’s atmosphere is one effect of human industry and agriculture. In fact, scientists had studied that the concentration of greenhouse gases has increased over the years. As a result, the Earth’s capacity retain heat. CO2 could have contribute just for around 0,3 degree Celsius of climate change. There is a strong suspect on the carbon dioxide climate sensitivity that AGWT models are to much high.

In conclusion, l’AGWT does not explain past hot nor the actual ones, correctly. Since 1850 to the present day, CO2’s pace and temperatures curves has been indented. Differently from CO2, la temperature registered different climatology and periods: warming years (1850-1880, 1910-1940, 1970-2000), alternated by cooling periods (1880-1910, 1940-1970) and almost a stability since 2000. Just think to since 1978 we have satellite estimates of temperature. Then, many of them show a more humble warming trend than those of climate models (IPCC models).

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