High pseudo - potential temperature along mei - yu front area mainly presented the deep convection of mei - yu area , so there would be a front along each side of the high pseudo - potential temperature , then the pseudo front would appear 有人单从假相当位温场分析锋面结构,结果在假相当位温高值舌区两侧各产生一个锋区,这就产生了虚假的锋区。