Abstract:

According to the statistic data of serious forest fire disaster in the year of 1951 to 1990 in Heilongjiang Province's forest area and the actual 286 data detected monthly from 1951 to 1991 in the North Pacific area,the basic laws and the time and phase characters of abnormal change,which were about monthly mean temperature of the North Pacific in the year when the forest fire disaster was serious in the Heilongjiang Province,were studied with the technology of analysis to abnormal degree.At the same time,the basic rules and the time and phase characters of abnormal change were also researched with the same technology in three years ahead of the serious year and three years after the serious year.It was concluded from the study that the years when the forest fire disaster was serious were positively related to the periods when the average distance of the sea surface temperature near the equator of the Pacific Ocean and they were synchronous.What's more,they were based on the prophase background that the sea surface temperature was abnormally low in the two years before the serious year came.It had important referenced value to scientifically predict the intending and quarter forest fire disaster activities and the lead-to-disaster potential of the forest area.

Key words: Forest fire, Serious year, Sea surface temperature, Law, Cause of formation