Learn how plants respond to higher atmospheric CO2 concentrations

How does rising atmospheric CO2 affect marine organisms?

Click to locate material archived on our website by topic

Lake Chen Co, Southern Tibet, China
Zhu, L.-p., Zhang, P.-z., Xia, W.-l., Li, B.-y. and Chen, L. 2003. 1400-year cold/warm fluctuations reflected by environmental magnetism of a lake sediment core from the Chen Co, southern Tibet, China. Journal of Paleolimnology 29: 391-401.

Working with magnetic particles of different grain size found in a sediment core covering the period AD 593-1998 that was extracted from Lake Chen Co in southern Tibet (China, 2856'N, 9036'E), the authors measured a number of magnetic properties, including "low-frequency dependent susceptibility, susceptibility of anhysteretic remanent magnetism, the saturation isothermal remanent magnetism [and] the isothermal remanent magnetism reverse." This work revealed three warm periods: one near the beginning of the record, one in the middle (1120-1370, which they call the "Middle Ages Warm-period"), and one at the end (1900-1998). Of these three, Zhu et al. concluded that "the warmest one occurred in ca. 1120-1370."