论文部分内容阅读
高火险时段是形成森林火灾重灾时段（年、季）的必要外部环境条件，也是可燃物安全管理的重要依据［１］。本文运用异常度法、分析了大兴安岭林区高火险时段年及其前后各３年、北半球副热带高压面积指数的变化及具规律。研究发现，北半球副热带高压面积指数具有在高火险时段前３年的４月至前１年的９月持续呈负距平、而在当年１～２月呈正距平的规律，为高火险时段的超前预测预报．提供了理论依据。
High-fire danger period is the necessary external environmental condition for forming the disaster season (year, season) of forest fire and is also an important basis for the safety management of combustibles [1]. In this paper, we use the anomaly method to analyze the changes and regularities of the subtropical high area index in the Northern Hemisphere during the period of high-fire danger in the Greater Khingan Range area and each 3 years before and after it. The study found that the subtropical high area index in the Northern Hemisphere had negative anomalies from April to the first year in the first 3 years of the high-fire danger period and a positive anomaly in January to February of that year, Predictive forecast. Provided a theoretical basis.