How does rising atmospheric CO2 affect marine organisms?

Click to locate material archived on our website by topic

Daihai Lake, Inner Mongolia
Zhangdong, J., Ji, S., Sumin, W. and Eniou, Z. 2002. The Medieval Warm Period in the Daihai Area. Hupo Kexue 14: 209-216.

The authors used rubidium/strontium ratio, calcium carbonate and organic concentration data of sediments cored from Daihai Lake in Inner Mongolia (11238'E, 4033'N) to reconstruct the climate of that region over the past 2,200 years. The results indicated the existence of a "warm and humid" climate that defined the Medieval Warm Period between AD 800 and 1100, which also exhibited the "strongest chemical weathering during the last 2,200 years."