Average Temperature Anomaly, Global

This ‘hockey stick’ shape chart illustrates how sharply average temperatures have risen in the last forty years with the world now almost 1 degree warmer than it was from 1961-1990.

Atmospheric CO2 at Mauna Loa Observatory

The amount of atmospheric CO2 has charted a steady climb higher. The Mauna Loa Observatory on the north flank of volcano of the same name in Hawaii is ideal for monitoring constituents in the atmosphere that can cause climate change.