FIG. 11 Monthly Northern Hemisphere lower-stratospheric temperature anomalies (°C) for
(a) the mid-latitudes (30°–60°N) and (b) the polar region (60°–90°N) derived
from the MSU channel 4. Anomalies are departures from the 1979–98 base period means.
(Data provided by the University of Alabama in Huntsville.)
