ascent rate meaning in English

浮上速度
上浮速度

In cumulus convection ascent rates of several metres a second give a cooling rate of a few degrees per minute .
在积云中，每秒几米的对流上升速度造成的冷却速率为每分钟几度。
Pilot balloons were filled with suitable amount of hydrogen to give an ascent rate of approximately 150 metres per minute throughout the flight
测风气球充以适量氢气，使气球上升速度在整个探空过程中固定在每分钟150米左右。
During an upper air sounding operation , a balloon filled with hydrogen carrying a radiosonde and a radar reflector was released . the ascent rate of the balloon was roughly 360 metres per minute
在进行高空探测时，氢气球上挂上一个无线电探空仪及一个雷达反射器，以每分钟360米左右的速度上升。