Possibility to influence oceanic evaporation to protect Sahel/Sahara
Changing ocean evaporation would impact weather &amp; climate globally. While that may benefit some regions, it would be detrimental to other regions - robbing Peter to pay Paul.

One of the risks would be the effect on rainfall intensity, rainfall duration and the amount of rain falling in any location. It could have disastrous consequences for landslide prone regions or low lying areas prone to flooding.

Increased rainfall would result in accelerated soil leaching requiring soil nutrients to be replaced at a great rate to allow the continuation of farming and for forests to keep developing.

The accelerated soil leaching would also have an impact on the oceans and marine life and land based life reliant on marine life. Additional phosphates would result in increased algal booms, particularly in estuarine waters. Excessive algal blooms can make such waters toxic to life than can only live in such waters.

In addition to accelerated soil leaching there will be associated soil run-off and silting of rivers, estuarine systems and coast outflow regions. For marine wildlife parks such as the Great Barrier Reef, that would have a devastating consequence and may lead to the destruction of all biodiversity with such reefs.