垂直螺旋度的演变对本次西南涡暴雨有较好预报指示意义。
The evolution of vertical helicity has a better forecast instruction significance to the southwest vortex rainstorm.
沙尘暴区上空垂直螺旋度的垂直分布为中高层负值，低层正值。
The distribution of helicity over the sandstorm area was negative at higher levels and positive at lower levels.
在垂直螺旋度的基础上，定义了散度通量，水汽垂直螺旋度和水汽散度通量三个宏观物理量。
On the basis of vertical helicity, we define three parameters, namely, the divergence flux, moisture vertical helicity and moisture divergence flux.
螺旋度分析表明，在不均匀的强上升气流的作用下，涡旋的水平分量向垂直分量转化是此次强降水的可能机制之一。
The analysis of helicity also revealed that under the updraft, the conversion from the horizontal whirlpool into the vertical whirlpool is one of the possible mechanisms of the event.
本文首先探讨了由多普勒天气雷达提供的垂直风廓线产品(VWP)计算风暴相对螺旋度(SRH)的方法和步骤。
A method and steps of calculating storm relative helicity (SRH) according to the Doppler radar vertical wind profile (VWP) products are discussed firstly in this paper.
本文首先探讨了由多普勒天气雷达提供的垂直风廓线产品(VWP)计算风暴相对螺旋度(SRH)的方法和步骤。
A method and steps of calculating storm relative helicity (SRH) according to the Doppler radar vertical wind profile (VWP) products are discussed firstly in this paper.
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