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<p>Arctic fires have become more frequent in recent decades. Previous research highlighted climate variables as the driving factor of fire occurrence in the Arctic, largely ignoring the contribution of human activity. Here, we analyzed the relationship between fire occurrence and human activity, as represented by artificial light at night, from 2001 to 2013 at pan-Arctic scale. Our results show a 2.45 [2.14, 2.82] times higher fire occurrence inside the lit area (exactly zero km distance) compared to control points randomly selected from areas with similar climate conditions. Moreover, fire occurrence exhibited a strong spatial association with distance to lit areas, with higher fire occurrence observed closer to human activity. Differences in fire occurrence near lit area for similar human activities suggest the potential of fire management. Effective management of fire risk around lit area to reduce ignition risks along with effective firefighting strategies are important to reduce damage to infrastructure, disturbance to permafrost ecosystems and positive feedbacks to climate warming.</p>

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Human activity increases Arctic fire occurrence within and near lit areas

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年7月31日

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  • Cengiz Akandil,
  • Ramona J. Heim,
  • Elena Plekhanova,
  • Nils Rietze,
  • Miguel O. Román,
  • Zhuosen Wang,
  • Reinhard Furrer,
  • Gabriela Schaepman-Strub

摘要

Arctic fires have become more frequent in recent decades. Previous research highlighted climate variables as the driving factor of fire occurrence in the Arctic, largely ignoring the contribution of human activity. Here, we analyzed the relationship between fire occurrence and human activity, as represented by artificial light at night, from 2001 to 2013 at pan-Arctic scale. Our results show a 2.45 [2.14, 2.82] times higher fire occurrence inside the lit area (exactly zero km distance) compared to control points randomly selected from areas with similar climate conditions. Moreover, fire occurrence exhibited a strong spatial association with distance to lit areas, with higher fire occurrence observed closer to human activity. Differences in fire occurrence near lit area for similar human activities suggest the potential of fire management. Effective management of fire risk around lit area to reduce ignition risks along with effective firefighting strategies are important to reduce damage to infrastructure, disturbance to permafrost ecosystems and positive feedbacks to climate warming.