Hot fire, cool soil
Hot fire, cool soil
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DOI：
10.1002/grl.50299
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发表时间：
2013-04-28
影响因子：
5.2
通讯作者：
Ritsema, Coen J.
中科院分区：
文献类型：
--
作者：
Stoof, Cathelijne R.;Moore, Demie;Ritsema, Coen J.
野火通过移除植被和改变土壤，极大地增加了景观对洪水和侵蚀事件的脆弱性。火灾对土壤的损害随着土壤温度的增加而增加，对于没有阴燃燃烧的火灾，目前的理解是土壤温度随着燃料负荷和火灾强度的增加而增加。然而，在这里，我们表明，这种基于均匀条件下的实验的理解并不一定适用于更相关的更大规模，那里的土壤、植被和火灾特征是不同的。在集水区规模的火灾实验中，燃料装载量高、火很热的地方，土壤出奇地凉爽，相反，在预计凉爽的地方，土壤很热。这表明，对土壤的最大火灾破坏可能发生在燃料负荷和火灾强度较低而不是较高的地方，这对火灾发生之前、期间和之后的火灾易发区的管理具有重要意义。
Wildfires greatly increase a landscape's vulnerability to flooding and erosion events by removing vegetation and changing soils. Fire damage to soil increases with increasing soil temperature, and, for fires where smoldering combustion is absent, the current understanding is that soil temperatures increase as fuel load and fire intensity increase. Here, however, we show that this understanding that is based on experiments under homogeneous conditions does not necessarily apply at the more relevant larger scale where soils, vegetation, and fire characteristics are heterogeneous. In a catchment-scale fire experiment, soils were surprisingly cool where fuel load was high and fire was hot and, conversely, soils were hot where expected to be cooler. This indicates that the greatest fire damage to soil can occur where fuel load and fire intensity are low rather than high, and has important implications for management of fire-prone areas prior to, during, and after fire events.