Aesma wrote:The Sahara isn't new and wind isn't new so yes this has happened before. Climate change is making the Sahara bigger and drier so these might happen more frequently and be more severe.
einsteinboricua wrote:Aesma wrote:The Sahara isn't new and wind isn't new so yes this has happened before. Climate change is making the Sahara bigger and drier so these might happen more frequently and be more severe.
Jury is still out on how the Sahara is doing. If anything, it's the Sahel (the region between the lush tropical forests and the arid desert) that's expanding. When wet, it's covered in grass (which can keep particles grounded); when it's dry, it allows particles to be carried by the wind.
Some research suggests that climate change may allow parts of the Sahara to be green (which would mean a reduced desert landscape), but whether it's because of the Sahel growing into the desert or actually becoming green and fertile is not known.
That being said: this is not a new phenomenon. A dust cloud of this magnitude has rarely been seen, but these dust clouds are common during the summer months and evidence goes back to colonial times. It's been suggested that these dust clouds are beneficial to agriculture in the Caribbean as sediments carry nutrients for the soil.
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