大提顿国家公园11月9日起焚烧燃料堆：四处地点陆续作业，烟雾或滞留数日
美国国家公园管理局（NPS）11月2日发布消息，位于怀俄明州的大提顿国家公园（Grand Teton National Park）最快将于11月9日起，由提顿跨部门消防队对燃料削减项目形成的堆积物进行焚烧，以降低野火风险。
燃料削减包括疏伐树木、修剪低处枝条，以及清除林地地面的枯木与灌木。消防人员把这些木材与灌木堆成金字塔形堆垛，晾置一年后再予焚烧——堆积物焚烧是整个疏伐流程的最后一步。
焚烧将在湿润天气与积雪带来的低火行为条件下进行。点火当天白天可能看到烟雾，烟雾并可能在当地滞留数日。
本轮焚烧计划在四处地点进行：Colter Bay、Beaver Creek、Elk Ranch 与 Kelly Pit。
公园方面表示，具体点火时间难以确切预测，工作队只会在天气与烟雾扩散条件有利、火势蔓延到堆垛之外的风险较低时点火；未来数月内只要条件允许，焚烧作业会持续进行。
所有焚烧作业都以公众与消防人员安全为首要考虑。消防管理人员将全程监测堆垛，确保燃料完全燃烧，并评估现场条件；若烟雾滞留，道路沿线将设置告示牌，提醒驾驶人打开车灯以保行车安全。（来源：美国国家公园管理局）
Grand Teton National Park to Begin Fall Pile Burns on November 9 to Cut Wildfire Risk
The National Park Service (NPS) announced on November 2 that Teton Interagency Fire crews will begin burning piles created by fuel reduction projects in Grand Teton National Park in Wyoming as early as November 9, in order to reduce wildfire risk.
Fuel reduction includes thinning trees and removing lower limbs, and clearing dead wood and brush from the forest floor. Firefighters place the wood and brush into pyramid-shaped piles and let them cure for a year before burning them; pile burning is the last step in the thinning process.
The piles will be burned under low fire behavior conditions resulting from wet weather and snow accumulation. Smoke may be visible during the day of ignition and may linger in the area for a few days.
Fuel reduction burns are planned near four locations: Colter Bay, Beaver Creek, Elk Ranch, and Kelly Pit.
The park said exact timing is difficult to predict. Crews will ignite piles only when weather and smoke-dispersal conditions are favorable and the risk of fire spreading beyond the piles is low, and burning may continue over the next several months as conditions allow.
Public and firefighter safety is always the priority in all burn operations. Fire management staff will monitor the piles to assure complete combustion and consumption of all fuels and to assess conditions; if smoke lingers, signs will be posted along roadsides to remind drivers to use headlights for safer travel. (Source: National Park Service)
来源：美国国家公园管理局
发布：GSM·美国（发布链接）
图片来源：图片来源：Wikimedia Commons，Frank Kovalchek，CC BY 2.0 / Image: Wikimedia Commons, Frank Kovalchek, CC BY 2.0
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