In 2009, new guidance for wildland fire management in the United States expanded the range of strategic options for managers working to reduce the threat of high-severity wildland fire, improve forest health and respond to a changing climate. Markedly, the new guidance provided greater flexibility to manage wildland fires to meet multiple resource objectives. We use Incident Status Summary reports to understand how wildland fire management strategies have differed across the western US in recent years and how management has changed since the 2009 Guidance for Implementation of Federal Wildland Fire Management Policy. When controlling for confounding variation, we found the 2009 Policy Guidance along with other concurrent advances in fire management motivated an estimated 27 to 73% increase in the number of fires managed with expanded strategic options, with only limited evidence of an increase in size or annual area burned. Fire weather captured a manager’s intent and allocation of fire management resources relative to burning conditions, where a manager’s desire and ability to suppress is either complemented by fire weather, at odds with fire weather, or put aside due to other priorities. We highlight opportunities to expand the use of strategic options in fire-adapted forests to improve fuel heterogeneity.

中文翻译：

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政策变化对野火管理策略的影响：美国西部范式转变的证据？

2009 年，美国野火管理新指南扩大了管理人员的战略选择范围，以减少高强度野火的威胁、改善森林健康和应对不断变化的气候。值得注意的是，新指南为管理野火以满足多个资源目标提供了更大的灵活性。我们使用事件状态摘要报告来了解近年来美国西部的野火管理策略有何不同，以及自 2009 年联邦野火管理政策实施指南以来管理发生了哪些变化。在控制混杂变异时，我们发现 2009 年的政策指南以及火灾管理方面的其他同步进步推动了通过扩展战略选择管理的火灾数量估计增加了 27% 到 73%，但仅有有限的证据表明火灾规模或年度燃烧面积增加。火灾天气捕获了经理的意图和与燃烧条件相关的火灾管理资源的分配，在这种情况下，经理的愿望和抑制能力要么得到火灾天气的补充，要么与火灾天气不一致，要么因其他优先事项而搁置。我们强调在适应火灾的森林中扩大战略选择的使用以改善燃料异质性的机会。经理的抑制欲望和能力要么得到火灾天气的补充，要么与火灾天气不一致，要么因其他优先事项而搁置。我们强调在适应火灾的森林中扩大战略选择的使用以改善燃料异质性的机会。经理的抑制欲望和能力要么得到火灾天气的补充，要么与火灾天气不一致，要么因其他优先事项而搁置。我们强调在适应火灾的森林中扩大战略选择的使用以改善燃料异质性的机会。