Global Warming Speeds Up - Naturally

Those who study global warming talk about a tipping point. That is, there comes a point when we have gone so far into the process of global warming, it cannot be halted. How can that be?

Well, consider the polar ice caps. The ice reflects large amounts of light and heat back into space. The world is cooler than it would be otherwise because we have these great areas of packed snow and ice. But, the ice caps are diminishing. The north and south polar regions are actually heating up faster than the rest of the planet. The Arctic is melting exposing more open sea which absorbs light and heat much more than the ice. The same sort of thing is happening to the ice shelves in the Antarctic. So, there is less ice to reflect light and heat. The planet heats up more. The melting gets faster. And so on.

Now consider the matter of permafrost. Permafrost is ground that so cold it remains frozen year round. There are several areas of permafrost around the world. Many of these are actually frozen bogs. Over the past few years, as the world has been heating up, a growing number of these sections have been defrosting. They are no longer permafrost.

The problem lies in that the frozen state of these bogs kept contained large quantities of methane gas. Methane in the environment is a greenhouse gas that traps heat in the atmosphere the way carbon dioxide does, but it is 25 times more powerful in its heat trapping action. As the permafrost melts it is releasing huge amounts of methane into the atmosphere. This is speeding up the process of global warming.

So, with the melting of the polar ice and the release of methane with the defrosting of permafrost, we have two examples in which nature itself has joined in the process of heating up our planet. When the tipping point is reached, nature will keep the process of global warming rolling even if all of the human contributions cease. There can be no going back.

Because the polar regions are showing more drastic warming trends than the rest of the planet, the natural contributions to the global warming factors are entering the picture sooner than expected and to a greater extent. This means that the furthermost out (later in time) predictions of when the tipping point would be reached are definitely wrong. The climate change is not going to be nearly as gradual as we hoped.

That's my two cents.

Wade Houston
September 12, 2007