"What if the general reflective surface of uninhabited areas were darkened across the spectrum, but especially in the radiative thermal and infrared region? Wou

"What if the general reflective surface of uninhabited areas were darkened across the spectrum, but especially in the radiative thermal and infrared region? Would monsoons return?" When you "darken" something it means that the amount of energy in that portion of the spectrum is absorbed, naturally as heat. Hot bodies emit in infrared wavelength, i.e. will "leak" that heat. So, it's not enough to darken an area, you also have to make sure the energy gets used/consumed somehow, at least partially. Vegetation does that naturally.