Effects of the Medieval Climate Anomaly (1140s)

Timeline

1. 1141–1145Northern and Western Europe · Western EuropeThe warm period extended viticulture and grain ripening northward, accelerating land reclamation and population growth in Northern Europe; the manorial economy of Western Europe expanded within a relatively favorable climatic window, providing a material basis for the rise of cities and trade in the mid-12th century.
2. 1142–1148Jianghuai region, China · ChinaAgainst the backdrop of the Song-Jin wars, the Jianghuai farming region was extremely sensitive to interannual precipitation fluctuations; monsoon anomalies accompanying the warm period could intensify floods or droughts, directly affecting military grain supplies and border military-agricultural colonies, intertwined with border economic recovery after the Treaty of Shaoxing.
3. 1144–1150Sahel and Sahara margin · SahelThe climate anomaly was not uniformly warm: parts of the Sahel experienced drought cycles, prompting nomadic groups to move south or reorganize trade routes, interacting environmentally and socially with the contemporaneous rise of the Almohads in North Africa and changes in trans-Saharan trade routes.