WHAT’S HAPPENED TO OUR RAINFALL
There is abundant scientific evidence that deforestation and degradation of vegetation causes significant reductions in rainfall by:
- reducing the recycling of rainfall to the atmosphere by transpiration
- reducing the drawing in of moist coastal air
- reducing updrafts of moist air
- reducing rooting depth and the recycling of deep soil moisture
- increasing loss of water from the land by runoff
- reducing the organic aerosols necessary for the condensation of rain drops.
Deforestation has other climatic impacts; the reduction of surface roughness increases wind speeds, the reduction of transpiration increases temperatures by reducing evaporative cooling and cloud cover, and the burning of vegetation releases soot to the atmosphere where it can reduce rainfall.
NEFA BP: Clearing Our Rainfall Away Eiseltová et. al. (2012) consider:
The water cycle is akin to the ‘bloodstream’ of the biosphere. Returning water to the landscape and restoring more natural vegetation cover is the only way to restore landscape sustainability. More attention in present-day science needs to be devoted to the study of the role of vegetation in the water cycle and climate amelioration. Restoration of a more natural vegetation cover over the landscape seems to be the only way forward.