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Figure 1: Zonally-averaged net cloud forcing in summer and
in winter [ Harrison et al., 1990].
Figure 2: Cloud cover over the oceans, principally low-altitude stratus,
in summer and in winter [ Warren et al., 1988].
Figure 3: Annual average departure of global average temperature from
the mid-twentieth century mean (left scale) compared with the
concentration of carbon dioxide in the atmosphere (right scale). The
thick line is a running average of the temperature change. See the text
for references.
Figure 4: The running average of changes in global average temperature
(left scale) compared with the global rate of production of carbon
dioxide by the burning of fossil fuel on a logarithmic scale (right).
See the text
for references.
Figure 5: Changes in global average temperature (left scale) and rate
of combustion of fossil fuel (right scale). The thin solid line is
the observed departure of global average temperature from the
mid-twentieth century mean. The heavy solid line (Theory) is the
difference between cumulative fossil fuel burning and a term proportional
to the current rate. To avoid clutter on the graph, the theory curve
has been moved up half a degree.