１９９８年汛期天气异常，其特点，一是副热带变化的位置反常，长时间位置偏南；二是热带风暴数量少、时间晚、强度弱，这是历史上是罕见的。由于１９９８年气候异常，造成长江发生了１９５４年以来最大的全流域洪水，连续出现８次洪峰。松花江也连续出现３次洪峰，干流洪... The unusual weather in the flood season in 1998 is characterized by the abnormal location of the subtropical changes and the southward position for a long time. The second is that the number of tropical storms is small, the time is late, and the intensity is weak, which is rare in history. Due to the anomalous climate in 1998, the largest flood in the whole basin since 1954 occurred in the Yangtze River, with eight consecutive flood peaks. Songhua River also appeared in three consecutive flood peak, mainstream flood ...