Fire history within the northern larch forests of Central Siberia was studied (65 + °N). Fires within this area are predominantly caused by lightning strikes rather than human activity. Mean fire return intervals (FRIs) were found to be 112 ± 49 years (based on firescars) and 106 ± 36 years (based on firescars and tree natality dates). FRIs were increased with latitude increase and observed to be about 80 years at 64°N, about 200 years near the Arctic Circle and about 300 years nearby the northern range limit of larch stands (~71° + N). Northward FRIs increase correlated with incoming solar radiation (r = −0.95). Post-Little Ice Age (LIA) warming (after 1850) caused approximately a doubling of fire events (in comparison with a similar period during LIA). The data obtained support a hypothesis of climate-induced fire frequency increase.

中文翻译：

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西伯利亚中部的落叶松森林：回火间隔的长期趋势。

研究了西伯利亚中部北部落叶松森林内的火灾历史（65 +°N）。该区域内的火灾主要是由雷击引起的，而不是人类活动造成的。发现平均回火间隔（FRI）为112±49年（基于火疤）和106±36年（基于火疤和树木的出生日期）。FRIs随着纬度的增加而增加，在北纬64°时约为80年，在北极圈附近约为200年，而在落叶松林分的北范围极限（〜71°+ N）附近则约为300年。北向FRIs与入射太阳辐射相关（r = -0.95）。小冰期后（LIA）的变暖（1850年之后）导致火灾事件大约翻了一番（与LIA期间的类似时期相比）。获得的数据支持由气候引起的火灾频率增加的假设。