The shearing wind helicity and thermal wind helicity are introduced and applied to a northeastern coldvortex rainfall event.
引入切变风螺旋度和热成风螺旋度，并将其应用于东北冷涡暴雨的诊断分析。
2
The structure of coldvortex cloud system is catalogued by two types, the simple vortex structure and the occluded cyclone structure.
冷涡云系的结构可归纳为单纯的冷涡结构和具有锢囚气旋结构两类。
3
It is shown that: (1) the anomalous coldvortex activity in Northeast China in the early summer is quite in concert with persistent circulation anomalies near the Ural Mountains and Japan.