jet steam meaning in English

喷射蒸气

We can use the mm5 model in definite time , definite area weather forecasting . we conclude that : : the moving route of this necw in its developing progress was direct - south along latitude , the cold air is rough , and just this made the rough vertical velocity ; the necw southern moving and conflicting with the west pacification sub - tropical high makes rough jet steam . the plenty south - west warm and wet air made by the jet stream gave the rainstorm demanded vapor ; . the rough vertical velocity by jet stream is a main reason in this rainstorm ; the mm5 model uses four - direction analysis data as its input , this avoids some errors occurred in observe and transfer , thus made the result more useful
综合分析认为： ( 1 ) 、这次冷涡在其发生发展过程中，其移动路径是沿经圈直线南压，携带的冷空气势力较强，形成槽后较强的垂直运动； ( 2 ) 、西太平洋副热带高压偏北位置与东北冷涡南压形成的急流轴，把源源不断的西南暖湿气流输送到辽西地区，也就是急流轴的左前方位置，为这次暴雨的产生提供了充足的水汽来源； ( 3 ) 、低空急流不但为暴雨输送水汽，其造成的较强的垂直环流也是产生强降水的一个主要原因； ( 4 ) 、 mm5模式以四维同化资料作为初始场，最大限度地避免了观测误差可能造成的积分不稳定，提高了模拟结果的参考价值。