It is found out that: the potential field is motional, and the motional rate is related with the temperaturegradient in the field.
我们发现：这种电势场是运动的，运动速率与其所在区域的温度梯度的变化率有关。
2
During the impurity radiation, the density perturbation driven by density gradient couples with the temperature one and then affects the electrostatic potential one.
电子密度梯度直接影响密度涨落，并通过杂质辐射与温度涨落相互耦合，进而影响静电势涨落。
3
Meanwhile, by the influence of water vapor in the process of heating, the gradient of equivalent potentialtemperature weakened, and baroclinic term also declined, so the total MPV increases.