Fire in arctic tundra of Alaska: past fire activity, future fire potential, and significance for land management and ecology
Fire in arctic tundra of Alaska: past fire activity, future fire potential, and significance for land management and ecology
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阿拉斯加北极苔原火灾：过去的火灾活动、未来的火灾潜力以及对土地管理和生态的意义
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
M. Whitley
中科院分区：
文献类型：
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作者：
N. French;L. Jenkins;T. Loboda;M. Flannigan;R. Jandt;L. Bourgeau;M. Whitley
利用阿拉斯加大型火灾数据库的记录，完成了对阿拉斯加北极苔原火灾的多年分析。冻原植被火灾是由北极圈植被图定义的，并划分为阿拉斯加的五个冻原生态区。详细审查了这些地区的火灾记录，并根据未来的气候情景分析了未来的火灾可能性。根据数据记录，苔原火灾的平均面积为22平方公里（5454英亩）。火灾的平均面积为10平方公里（2452英亩），中位数为0.064平方公里（16英亩），表明小型火灾很常见。虽然不常见，但在四个生态区和所有五十年中记录了16起面积超过300平方公里（74 132英亩）的火灾。如火灾天气指数所示，温暖的夏季加上干燥期的延长，预计会增加火灾活动。在土地管理和生态系统服务的背景下讨论了当前火灾状况和火灾状况潜在变化的影响。阿拉斯加目前的火灾管理做法和土地利用规划应根据目前的火灾状况和预计随着气候变化而发生的火灾状况的预期变化，专门针对苔原地区。
A multidecadal analysis of fire in Alaskan Arctic tundra was completed using records from the Alaska Large Fire Database. Tundra vegetation fires are defined by the Circumpolar Arctic Vegetation Map and divided into five tundra ecoregions of Alaska. A detailed review of fire records in these regions is presented, and an analysis of future fire potential was performed based on future climate scenarios. The average size of tundra fire based on the data record is 22 km2 (5454 acres). Fires show a mean size of 10 km2 (2452 acres) and median of 0.064 km2 (16 acres), indicating small fires are common. Although uncommon, 16 fires larger than 300 km2 (74 132 acres) have been recorded across four ecoregions and all five decades. Warmer summers with extended periods of drying are expected to increase fire activity as indicated by fire weather index. The implications of the current fire regime and potential changes in fire regime are discussed in the context of land management and ecosystem services. Current fire management practices and land-use planning in Alaska should be specifically tailored to the tundra region based on the current fire regime and in anticipation of the expected change in fire regime projected with climate change.