Saharan air layer
Hot, dry and sometimes dust-laden atmospheric layer / From Wikipedia, the free encyclopedia
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The Saharan air layer (SAL) is an extremely hot, dry, and sometimes dust-laden layer of the atmosphere that often overlies the cooler, more humid surface air of the Atlantic Ocean. It carries upwards of 60 million tonnes of dust annually over the ocean and the Americas.[1] This annual phenomenon sometimes cools the ocean and suppresses Atlantic tropical cyclogenesis.[2]
The SAL is a subject of ongoing study and research. Its existence was first postulated in 1972.[3]:ā1330ā