21世紀における森林被覆面の変化の高解像度グローバルマップ
M C Hansen1, P V Potapov, R Moore
1Department of Geographical Sciences, University of Maryland, College Park, MD 20742, USA.
まとめ
2000年から2012年にかけての衛星データを用いて,世界の森林の変化を定量化しました. 熱帯雨林の損失は毎年増加し,他の場所での利益によって相殺され,集中林業は亜熱帯雨林の変化を引き起こしました.
科学分野:
- 環境科学 環境科学
- リモートセンシング (リモートセンサー)
- 林業 林業 林業 林業 林業
背景:
- グローバルな森林生態系サービスは不可欠ですが,森林の変化を包括的に定量化することは限られています.
- 森林の動態を理解することは,気候変動の緩和と生物多様性の保全に不可欠です.
研究 の 目的:
- 高解像度衛星データを用いて,2000年から2012年の間に地球規模で森林の減少と増加をマッピングする.
- 世界各地の異なる気候領域における森林変化の傾向と要因を特定する.
主な方法:
- 地球観測衛星データを活用して,世界の森林変化マッピングを行いました.
- 森林の損失と利益の詳細な分析のための30メートルの空間解像度を達成しました.
- タイムトレンドを特定するために,2000年から2012年までのデータを分析した.
主要な成果:
- 全世界の森林損失の230万平方キロメートルと,森林増加の080万平方キロメートルの地図を作成しました.
- 森林の減少傾向は,熱帯気候領域のみで増加しており,平均2101km2/年です.
- 熱帯雨林は密集林業による変化率が最も高く,北極林は火災と林業による大きな損失を示した.
結論:
- 熱帯は,森林の減少傾向が増加しているため,森林保全の取り組みの重要な焦点です.
- 森林の集中伐採と火災などの自然災害は,世界の森林の変化の主な要因である.
- この研究は,森林の変化の一貫性のある高解像度記録を提供し,情報に基づいた環境管理に不可欠です.
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