| 1. | Application of potential vorticity diagnosis in forecasting strong rain and hail storms over loess plateau
位涡诊断在黄土高原强对流风暴预报中的应用 |
| 2. | The variation of the negative / positive value of the baroclinc potential vorticity under 850hpa has a very good corres pondence with the development of the cyclone
850hpa以下的斜压位涡的正负值的变化与气旋的发展有很好的对应关系。 |
| 3. | Dynamic and thermal effect may also play an important role . results show that positive perturbation of potential vorticity in the lower layers which is pro
4地形动力作用的影响表明: ( l )大巴山的各部分对降水的影响都很大，尤其是大巴山西部山脉影响最大。 |
| 4. | One of factors which activize the explosive development of cyclone exists strong convective instability in lower layers from the analysis of the barotropic potential vorticity
由正压位涡分析得出，气旋爆发性发展的启动因子之一为低层存在强对流性不稳定。 |
| 5. | The interaction of the positive isobaric moist potential vorticity disturbance at low and upper level is a possible mechanism of the genesis and development of mesoscale vortex
发现高低空正的湿位涡扰动的共同作用是对流层中低层中尺度低涡生成的一种可能机制。 |
| 6. | In a word , convective instability strong baxoclinicity barotropic advection of potential vorticity and latent heat release are factors which activize this explosive development of cyclone
总之，对流不稳定、强斜压性和正压位涡平流、潜热释放是本次气旋发展的启动因子。 |
| 7. | The mcc develops mechanism is analyzed based on moist thermal wind theory , relatively mesoscale convectively generated vortex , potential vorticity thinking , inertial instability theory and so on
用湿热成风、相对中层涡旋、等熵位涡、惯性稳定度等讨论了mcc的发生发展机理。 |
| 8. | Inertial instability barotropic advection of potential vorticity the subsidence of the large value of potential vorticity above cyclone and geostrophic adjustment process is dynamical factors which make the cyclone developed violently
惯性不稳定，正压位涡平流以及正压位涡大值下沉至气旋上空和地转适应过程是气旋强烈发展的动力因子。 |
| 9. | Also the scale - separated technique is introduced to depict the clear mesoscale structure with the mcs , and the isentropic potential vorticity ( ipv ) and the moist potential vorticity ( mpv ) are used to diagnose the evolution mechanism of mcs
还借助位涡物理量及位涡观点、湿q矢量及湿q矢量散度对mcs进行诊断分析，并且利用mm5模拟了暴雨过程。 |
| 10. | Generally under 300hpa the subsidence zone of the potential vorticity lies above cyclone at the violent stage of the development of the cyclone , however , the center of cyclone still lies near the potential vorticity of large value above 300hpa
气旋强烈发展期，一般300hpa以下，位涡的下沉区在气旋的上空， 300hpa以上气旋中心仍位于大值位涡后部。 |
