グローバルな極端な火災天候の同期性が増加しています

Cong Yin^1,2, John T Abatzoglou³, Matthew W Jones⁴

¹Sierra Nevada Research Institute, University of California, Merced, CA, USA.

Science advances

|February 18, 2026

まとめ

気候変動により,同期火災天候 (SFW) は世界中で増加しており,火災撲滅を複雑化し,空気の質を悪化させている. この傾向は,消防活動と公衆衛生にますます大きなリスクをもたらしています.

科学分野:

環境科学環境科学
気候科学気候科学
大気科学大気科学

背景:

極端な火災天候は,広範囲に広がる火災を引き起こし,資源を圧迫し,空気の質を低下させます.
地域間の同期火災天候 (SFW) は,火災管理と公衆衛生に複雑な課題をもたらします.

研究の目的:

地域内および地域間の同期火災天候 (SFW) のパターンと傾向を分析する.
SFW,気候の変動,および空気の質への影響の間のリンクを調査する.
観測されたSFW増加に対する人為的な気候変動の寄与を定量化するために.

主な方法:

1979年から2024年までの歴史的な火災天気データの分析.
傾向を評価するための統計的方法と,気候変動への帰属.
SFW,気候の振動 (例えばエルニーニョ) とPM2.5濃度との相関分析.

主要な成果:

北部の温帯地帯と北部の北極地帯では,高度の地域内SFWと,地域間の同期性が上昇しています.
1979年から2024年までのほとんどの地域におけるSFWの2倍以上の増加.
SFWの増加の50%以上は,人為的な気候変動に起因しています.
エルニーニョ現象は,赤道アジアにおけるSFWの増加と相関しています.
SFWと地域的な火災によるPM2.5.5との間に強い相関が発見されました.

結論:

シンクロン火災天候は,主に人為的な気候変動によって引き起こされ,著しく増加しています.
気候の変動は,地域のSFWパターンに影響を与えます.
SFWの増加は,空気質の問題を悪化させ,火災撲滅を複雑にし,人間の健康と安全に重大なリスクをもたらします.

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