| 1. | Below 600hpa , the front of east asia was mei - yu front ; mei - yu equatorial front and polar front from the south to the north ; while above 600hpa , there was only mei - yu front . upon these conclusions , we put forward a conception model of east - asia front 在600hpa以下,东亚地区的经向方向锋区从南到北依次表现为梅雨锋,梅雨赤道缝和极锋;而在600hpa以上,只是极锋型的梅雨锋的单一结构。 |