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Hace 2 días · The sky is usually clear above the desert, and the sunshine duration is extremely high everywhere in the Sahara. Most of the desert has more than 3,600 hours of bright sunshine per year (over 82% of daylight hours), and a wide area in the eastern part has over 4,000 hours of bright sunshine per year (over 91% of daylight hours).
19 de jun. de 2024 · Dust from large deserts can be moved great distances from its source region by the prevailing winds; winds that are accelerated by rough topography and associated with dust outbreaks have been assigned regional names in various parts of the world because of their significant effects on those regions. Wind also affects the spread of wildfires.
Hace 6 días · Winds are not unusually strong or frequent in comparison with adjacent environments, but the general lack of vegetation in deserts exacerbates the effect of wind at ground level. Winds can induce the erosion of fine materials and the evaporation of moisture and thereby help determine which plants survive in the desert.
Hace 2 días · In the western margin of the desert the cold Canary Current reduces air temperatures, thereby reducing convectional rainfall, but resulting in higher humidity and occasional fogs. In the southern Sahara the winter is the period of the harmattan, a dry northeasterly wind laden with sand and other easily transported dust particles.
10 de jun. de 2024 · Katabatic wind, wind that blows down a slope because of gravity. It occurs at night, when the highlands radiate heat and are cooled. The air in contact with these highlands is thus also cooled, and it becomes denser than the air at the same elevation but away from the slope; it therefore begins to.
Hace 1 día · Monthly reports have numbered 5,000+ on four occasions in the past 10 years: June 2018 leads the way with an enormous 8,347 severe wind reports. Most recently, July 2023 was very active with a ...
Hace 1 día · This “mid-level jet” of enhanced winds, typically found at a height of 6,500 to 14,500 feet (2000 to 4500 meters), can cause tilting of the tropical cyclone vortex with height and can disrupt ...
