This deficiency seems to be caused by a weakening of the North East monsoon circulation in comparison to the long-term mean, which leads to formation of an anomalous anticyclonic vortex over the East Sea. The appearance of anticyclonic vortex causes a decrease in moisture transport that suppling to rainfall in the Central Viet Nam. In addition, there is only a main source of moisture from East Sea that favors rainfall formation over Central Viet Nam is lower than climatology. | Nội dung Text An investigation of rainfall deficiency in october and november in the central Vietnam during the 1997-1998 el nino event
