Movements Of Airglow Structures Within The Intertropical Arc Observed From Southern Kenya
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6300 Å airglow observations from Olorgesailie, Kenya (1.6°S, 36.4°E) show two types of movement within the southern intertropical red arc. The arc moves as a whole equatorwards at a rate of 3–4° per hour before local midnight tending to reverse direction after midnight. The second movement is an east-west wave propagation with a wavelength of approximately 600 km and a velocity of 120–130 m s−1. The wavelike movements have properties similar to medium scale atmospheric gravity waves.