by Syun-Ichi Akasofu
1. Introduction: The Little Ice Age (LIA)
Significant data show
- the LIA certainly ended in about 1800-1850 and
- the recovery has continuously progressed to the present with superposed ‘fluctuations’
Let’s first review changes of temperature from about 1000 to the present.
Figure 1(a) shows a typical example of tree-ring data from the middle latitudes. Compared with the mean 1961-1990 level, the temperature was relatively low from about 1100 to 1800-1850, indicating that the Earth experienced a relatively cool period, the LIA. [Read more…]