针叶幼林树冠火发生的内在机制

The Internal Cause of Occurencing Crown Fire in Young Coniferous Forest

为定量阐明针叶幼林树冠火发生的内在原因，对天山云杉幼林可燃物负荷量的垂直分布进行了调查测定，并对研究林分的潜在能量、潜在火强度、潜在火焰高度等潜在火行为指标进行了计算分析。结果表明：针叶幼林可燃物负荷量的垂直分布特征决定了其一般不易发生火灾，一旦发生火灾便很容易导致高能量的树冠火发生。

The vertical distribution of fuel load for Pinus koraiensis young coniferous forests in Tianshan was surveyed and determined in order to quantitatively illuminate the internal cause of crown fire, and the index of potential fire behavior such as potential energy, potential fire intensity and potential flame height was calculated also The results show that fire hardly occure due to the vertical distribution characteristic of fuel load for young coniferous forest, and once fire occures which will cause the high energy crown fire