admin /3 April, 2008
The planet has a temperature. It is now 0.6 degrees above its pre-industrial temperature and rising. Unless we act to address this, the illness could be fatal, to us.
Until the second world war the average surface temperature of the planet was below 15.1degrees Celsius. For the last twenty years it has barely dropped below 15.3. It now appears to be rising at 0.1 degrees a decade. The rate of increase is accelerating. On current trends, it will crack 16 degrees before the end of the century. A century ago it was well below 15.
If you think about the weather, an increase of a degree here or there seems pretty minimal. The temperature across Australia varies from high thirties in the centre to low teens in Tasmania. The drier parts of the continent regularly experience a daily fluctuation of twenty degrees. It makes fractions of a degree appear minimal.
It does not intuitively make sense that a small increase in average surface temperature can have a dramatic effect on the planet.
Unless, that is, we think about the planet differently.