相对涡度 relative vorticity
- 正相对涡度切变基流中低涡和涡块的合并,是东移低涡强度得以维持和发展的一个直接的原因。
The merging of the cyclonic vortex with vorticity lumps in the shearing basic flow of positive vorticity is directly responsible for the maintenance and development of the cyclonic vortex. - 结果表明:二者在环流形势、动力条件和低空急流方面存在著明显差异,汛期暴雨涡度、散度、垂直运动场较强,而非汛期暴雨冷空气强度相对较强,低空急流也较强。
The results show that the vorticity, divergence and vertical velocity are stronger in the flood season, but the cold wave and the low level jet are stronger in the non-flood season.
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