压强梯度力 Pressure-gradient force
（重定向自Pressure gradient force）
压强梯度力事实上并不是真正意义上的“力”，它其实是由于气压不同而产生的空气加速度(即单位质量所受的力)。它是产生从高气压区向低气压区的空气加速度的原因，产生风。在气象学中, 它指的是空气的水平运动，根据等式:
| 单词 | Pressure gradient force |
| 释义 |
Pressure gradient force
中文百科
压强梯度力 Pressure-gradient force（重定向自Pressure gradient force）
压强梯度力事实上并不是真正意义上的“力”，它其实是由于气压不同而产生的空气加速度(即单位质量所受的力)。它是产生从高气压区向低气压区的空气加速度的原因，产生风。在气象学中, 它指的是空气的水平运动，根据等式:
英语百科
Pressure-gradient force 压强梯度力（重定向自Pressure gradient force）
The pressure-gradient force is the force which results when there is a difference in pressure across a surface. In general, a pressure is a force per unit area, across a surface. A difference in pressure across a surface then implies a difference in force, which can result in an acceleration according to Newton's second law, if there is no additional force to balance it. The resulting force is always directed from the region of higher-pressure to the region of lower-pressure. When a fluid is in an equilibrium state (i.e. there are no net forces, and no acceleration), the system is referred to as being in hydrostatic equilibrium. In the case of atmospheres, the pressure gradient force is balanced by the gravitational force, maintaining hydrostatic equilibrium. In Earth's atmosphere, for example, air pressure decreases at increasing altitudes above Earth's surface, thus providing a pressure gradient force which counteracts the force of gravity on the atmosphere. |
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