西伯利亚中部的落叶松林：火灾间隔期的长期趋势
Larch Forests of Middle Siberia: Long-Term Trends in Fire Return Intervals.
作者信息
Kharuk Viacheslav I, Dvinskaya Mariya L, Petrov Ilya A, Im Sergei T, Ranson Kenneth J
机构信息
V. N. Sukachev Institute of Forest, Krasnoyarsk, 660036 Russia.
Siberian Federal University, Krasnoyarsk, 660041 Russia.
出版信息
Reg Environ Change. 2016 Dec;16(8):2389-2397. doi: 10.1007/s10113-016-0964-9. Epub 2016 Apr 7.
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 (FRI) were found to be 112 ± 49 years (based on fire scars) and 106 ± 36 years (based on fire scars and tree natality dates). FRI 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 FRI 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.
对西伯利亚中部落叶松林（北纬65°以上）的火灾历史进行了研究。该地区的火灾主要由雷击引起，而非人类活动。平均火灾重现期（FRI）经测定为112±49年（基于火灾疤痕）以及106±36年（基于火灾疤痕和树木出生率日期）。火灾重现期随纬度增加而变长，在北纬64°时约为80年，在北极圈附近约为200年，在落叶松分布北界（约北纬71°以上）附近约为300年。火灾重现期向北增加与入射太阳辐射相关（r = - 0.95）。小冰期（LIA）后的变暖（1850年之后）导致火灾事件大约增加了一倍（与小冰期的类似时期相比）。所获数据支持气候导致火灾频率增加的假说。
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