4

It depends on how you define the tropics. Strictly speaking, the tropics can be defined as the area between the tropic of capricorn and the tropic of cancer (23.5$^\circ$N/S respectively). This is because of the earth's axial tilt of 23.5$^\circ$. Since I don't think that the climate change will affect the axial tilt too much, I doubt it. However, if you ...


2

The mountains. The south has a steep relief, as well as the west. That means that there is much precipitation. The clouds throw every drop on these mountains, so almost nothing is left. The east is pretty low, so the remaining clouds (not much left) just fly over. In fact, deserts are generally not steep and they are usually behind the mountains. That is ...


2

Most arid and semi-arid regions are normally far inland. Often those also have terrain features that don't allow for the moist air to reach, such as mountain ranges, etc. So now if global temperatures increase, the evaporation in semi-arid regions increase as well, reducing the amount of water available for plants. At the same time moisture coming from the ...


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