Weather Eye with John Maunder

Global average temperatures of the troposphere – those observed from NOAA satellites – are computed each month by the University of Alabama. Temperatures shown are deviations from the average for the 30-year period 1981 to 2010.

The chart shows that, since 1979, when reliable satellite observations have been available, there has been little significant changes in global temperatures in the troposphere (except for ‘normal' variations), apart from a small warming trend.

The coolest months (since 1979), were September 1984 (-0.49 degrees) and November 1984 (-0.42 degrees), associated with the cooling from the Mount Pinatubo volcanic eruption.

The warmest months were February and April 1998 (both +0.76 degrees), associated with a very strong El Nino event.

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