Understanding of Poland history
Author: Bogdan Góralski
In this article I used next source of data:
St-Onge, G., and J.S. Stoner. 2011. Paleomagnetism near the North Magnetic Pole: A unique vantage point for understanding the dynamics of the geomagnetic field and its secular variations. Oceanography 24(3):42–50, http://dx.doi.org/10.5670/oceanog.2011.53.
According to article:
St-Onge, G., and J.S. Stoner. 2011. Paleomagnetism near the North Magnetic Pole: A unique vantage point for understanding the dynamics of the geomagnetic field and its secular variations ,
We see on the picture below (picture from above article) that North Magnetic pole position change.
It is explained by Earth’s coating shift in the my articles link: https://www.researchgate.net/publication/311766453_General_causes_of_changes_in_climate_and_speed_of_rotation_of_Earth
North Magnetic Pole position changes because of Earth’s coating movement. Movement of Earth's coating brings changes in location of climatic zones. Fertile cultivated zones (which had enough rain) will become dry. Formerly dry areas became rainy.
Shifts in precipitation during the last millennium in northern Scandinavia from lacustrine isotope records, link: https://www.researchgate.net/publication/257110616_Shifts_in_precipitation_during_the_last_millennium_in_northern_Scandinavia_from_lacustrine_isotope_records
According to above article we see that:
“Relatively wet summers are inferred from delta O-18(diatom) between 1000 and 1080 AD, 1300 and 1440 AD, and during the early 19th century, coincided with periods of high cloud cover inferred from tree-ring carbon isotopes, and other data for high Arctic Oscillation index. While relatively dry summers with increasing influence of winter snow are indicated between 1600 and 1750 AD. The co-response between carbon isotopes in trees and oxygen isotopes in diatoms strengthens the relationship between cloud cover and precipitation and the hypothesis that these changes were the result of significant regional shifts in atmospheric circulation”.
Between 1250-1500 AD we saw the rapid shift of Earth's coating i.e. North Magnetic Pole shift to the North and warming of European climate in the North like today. Relatively wet summers between 1000 and 1080 AD, 1300 and 1440 AD and good harvest ensured peaceful development of Europe.
Between 1500-1860 AD we saw rapid shift of Earth's coating i.e. rapid shift of North Magnetic Pole to the South and cooling European climate in the North. Cool and dry between 1600-1750 AD summers caused hunger in Europe and wars, uprisings and revolutions. In these times sparsely populated Poland was defeated by its strong populated neighbors looking for food for their societies.
Graph from my Polish book entitled: Natural History and Climate Change.
Link to the book: https://www.researchgate.net/publication/305471566_O_przyszlej_globalnej_pokojowej_rewolucji
Yellow – crude rates of births in England population,
Dark blue- prices of wheat in Europe,
Aquamarine- frequency of wars, revolutions in Europe,
Pink-development of England population
Warsaw, 11 September 2018, 18:20 Bogdan Góralski