|
Once again that ignores the macro-climate conditions which cause desertification. Increase heat causes increase in evaporation and increase in updrafts. These updrafts of saturated air cause a cycle over the region which results in percipitation directly over the region and builds upon itself to create saturated environments such as old growth or rain forests. Fear of shifting trade winds is relatively moot, as these are rarely altered for anything other than shifts in the axis degree of the entire planet.
Desertification by farming is a sufficient fear, however have nothing to do with global climate change and only macro climate changes with poor planning of agriculture. It's a sufficient fear, but again are on different planes. In addition, it would not be permanent as the major winds will always carry cold air south which pushes up the warm-saturated air and results in great spring rain and plenty of snow over the winter to melt.
__________________
"Smite the rocks with the rod of knowledge, and fountains of unstinted wealth will gush forth." - Ashbel Smith as he laid the first cornerstone of the University of Texas
|