这是因为太阳光的照射，使地面的空气受膨胀上升，冷空气下降补充，形成空气对流而引起的颠簸，中午飞行尤为明显。当飞机颠簸时，请您在座位上座好、系好安全带。
Why does turbulence occur in clear sky?
Due to the sun radiation, the heated and expanded surface air ascends and meets the cold descending air, this air convection causes the turbulence which is obvious at noon. Please remain seated and fasten your seat belt during the turbulence.
Why does turbulence occur in clear sky?
Due to the sun radiation, the heated and expanded surface air ascends and meets the cold descending air, this air convection causes the turbulence which is obvious at noon. Please remain seated and fasten your seat belt during the turbulence.
