Geography Reference
In-Depth Information
Fig. 14.3
Climate change and populations checks in the Northern Hemisphere in AD 800-1900.
(
a
) Northern Hemisphere temperature anomaly (
ı
C) from the AD 1961-1990 mean. (
b
) Years
with famine per decade. (
c
) Number of wars per year. (
d
) Number of deadly epidemic events of six
diseases (malaria, plague, typhus, measles, smallpox, and dysentery) per decade. Both series have
been smoothed by the Butterworth 100-year low-pass filter (described by the
bold curve
)
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