what did the greek do in there?
Greek traders spread along the eastern coast of the desert, establishing trading colonies along the Red Sea.
Sahara
Greek traders spread along the eastern coast of the desert, establishing trading colonies along the Red Sea. 
what purpose did seasonal monsoon winds have on trade UNANSWERABLE how is this name of the winds derived? The term originally derives from the early fourteenth century sense of trade (in late Middle English) still often meaning "path" or "track". what are its effects? Every year, millions of tons of nutrient-rich Saharan dust cross the Atlantic Ocean, bringing vital phosphorus and other fertilizers to depleted Amazon soils. what causes these winds? As part of the Hadley cell, surface air flows toward the equator while the flow aloft is towards the poles. A low-pressure area of calm, light variable winds near the equator is known as the doldrums, near-equatorial trough, intertropical front, or the Intertropical Convergence Zone. where is this desert located from where the dust is blown? African continent what is the highest temperature recorded there? A sand temperature of 83.5 °C (182.3 °F) has been recorded in Port Sudan. Ground temperatures of have been recorded in the Adrar of Mauritania and a value of 75 °C (167 °F) has been measured in Borkou, northern Chad. how big is it? It covers , amounting to 31% of Africa. how much does it rain there? The average annual rainfall ranges from very low in the northern and southern fringes of the desert to nearly non-existent over the central and the eastern part.
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Sahara [SEP] Greeks
By 500 BCE, Greeks arrived in the desert. Greek traders spread along the eastern coast of the desert, establishing trading colonies along the Red Sea. The Carthaginians explored the Atlantic coast of the desert, but the turbulence of the waters and the lack of markets caused a lack of presence further south than modern Morocco. Centralized states thus surrounded the desert on the north and east; it remained outside the control of these states. Raids from the nomadic Berber people of the desert were of constant concern to those living on the edge of the desert.