It will use radar, balloons and aircraft to look at the role of another sort of high-altitude cloud: cirrus clouds, which get spun off the tops of storms.

• 该工程将使用雷达、热气球与大气层飞行器来研究另一种高端云的作用，其名为卷云－它是在暴风雨出现时从其顶端意外形成的。