The warm period of the Middle Ages is undeniable, 2 new studies announced in Antarctica and Poland show – Watts?

From Notrickszone

By P Gosselin

Natural cycles drive our climate

The latest video from the German-based European Institute of Climate and Energy (EIKE) covers the warm medieval period of carbon dioxide and troubles, which has been the harshness of climate alarms.

Hat Tips: Climate News

The warm period of the medieval period was a natural warming stage between 700 and 1300 AD and climate models were not reproduced because the simulations mainly responded to CO2. At that time, carbon dioxide was not a factor because its concentration level in the atmosphere was almost constant. This is why people would rather keep the warmth of the Middle Ages.

But the facts are self-evident. Now, two studies add further to our understanding of medieval climates.

Antarctica

In October 2023, a paper by a team of researchers led by Zhangqin Zheng of the University of Science and Technology of China was published in the journal Quaternary Science Review. It involves historical changes in the Adeli penguin population in the Ross Sea region of Antarctica and its climatic impacts.

Two atmospheric environmental cycle modes, namely the Southern Ring Mode (SAM) and El Niño-Southern Oscillation (ENSO), have had a significant impact on the climate and marine ecosystems in the Ross Sea region. However, from a historical perspective, the impact of atmospheric environmental circulation patterns on penguin populations in the region is unclear. The researchers analyzed the sediment core of penguin colonies that were unexpressed by the Ross Sea and reconstructed changes in the Adeli penguin population over the past 1,500 years. Zhangqin Zheng and colleagues found The penguin population between 750 and 1350 AD reached a peak between 750 and 1350 AD, possibly due to the expansion of habitat in warm climates during the warm medieval periods.

After comparing the historical records of the Penguin populations in Cape Bird, Dunlop and Gladiator, it was found that all penuin populations in the Ross Sea increased between 750 and 1350 AD. The population trend also coincides with extreme fluctuations in the El Nino and Sam cycles.

The researchers concluded that Sam-enso could promote inflows of circular and improved circular deep water into the Ross Sea, thereby increasing the influx of nutrient-rich deep waters, as well as warmer climates, which could promote efficiency in open ocean areas, the so-called Polynyas and Adélie penguins.

This study shows that ENSO and SAM play an important role as triggers for strong climate fluctuations.

These natural processes are still going on today and will never end with the beginning of carbon dioxide.

Poland

Another study was from Poland. A research team led by Rajmund Przybylak from Nicholas Copernicus University of Torenicos in Poland published their work in November 2023 in the journal Past Climate. This article presents the latest findings about Poland's climate change from 1000 to 1500 during the period. This period also includes the warm period of the Middle Ages. Scientists first examined all available quantitative climate reconstructions produced for Poland over the past two decades. They also generated four new reconstructions using three DendroCologoly series and an extensive database of historical source data on weather conditions. The growth of coniferous trees in the lowlands and mountainous areas in Poland depends on the temperature of the cold season, especially in February and March. All available reconstructions based on dendritic data refer to this time of year. Summer temperature was reconstructed using bioagents and literature evidence. However, the latter is limited to the 15th century. Winter temperatures are used as agents for annual temperature agents, rather than usually using summer temperatures.

The warm period of the medieval period may have occurred in Poland from the late 12th century to the first half of the 14th century. Quantitative reconstructions of all analyses showed that the medieval warm periods in Poland were comparable or even warmer than the average temperatures during the period 1951-2000.

The coldest conditions throughout the study period were recorded in the first half of the 11th century (both in winter and summer) and in the second half of the 15th century (only in winter). The largest continent of climate occurred in the 15th century. A good agreement was found between the reconstruction of the Polish climate and the many reconstructions available in Europe.

Two new studies from Antarctica and Poland show that natural climate factors still need to be better understood so that they can be faithfully incorporated into climate models. Currently, the simulation does not attribute the main role to natural climate events, which is a serious mistake.

Related