How useful are climate models? My perspective on climate change #7

If the alarm about Anthropogenic Global Warming (AGW) originated in the 1980s when Dr Hansen saw a powerful correlation between the rise in temperature and the rise in carbon dioxide accumulations in the atmosphere, and projected the rises forward almost indefinitely, then the later proliferation of fearful climate scenarios for the future have obtained their rationale through what are called Global Circulation Models, or Global Climate Models — GCMs. A ‘model’ is a small version of something much larger, and a GCM is mathematical  model of the planet’s atmospheric system. Here is an example. The square diagram shows you what is going … Continue reading How useful are climate models? My perspective on climate change #7