在过去的十年中,人类对亚马逊地下碳动态的影响加剧了
Arthur Fendrich1,2, Yu Feng3,4, Jean-Pierre Wigneron5
1Laboratoire des Sciences du Climat et de l'Environnement, UMR 1572 CEA-CNRS-UVSQ, Gif-sur-Yvette, France. arthur.fendrich@lsce.ipsl.fr.
Nature communications
|July 21, 2025
概括
亚马逊雨林在2010-2020年间经历了显著的地面生物质碳 (AGC) 损失,主要是由于森林砍伐和退化. 有效的政策对于缓解这些持续的碳库存下降至关重要.
科学领域:
- 环境科学 环境科学
- 遥感 遥感 遥感 遥感
- 生态生态学 生态生态学
背景情况:
- 亚马逊雨林在全球碳循环中发挥着至关重要的作用.
- 由于各种驱动因素,其地面生物质碳 (AGC) 库存的年度变化是不确定的.
研究的目的:
- 拆分低频被动L频段微波数据,用于重建2010-2020年亚马逊地区的年度AGC变化地图.
- 量化由自然和人为因素影响的AGC动态.
主要方法:
- 利用了从2010年至2020年的被动L波段微波卫星数据.
- 开发了一种方法来分解低频数据,用于年度变化重建.
- 归因于森林砍伐,退化,再生和农业用途的量化碳库存变化.
主要成果:
- 在2010-2020年期间,亚马逊总共损失了-0.37 ± 0.17 PgC.
- 森林砍伐 (-0.55 ± 0.04 PgC) 和降解 (-0.42 ± 0.08 PgC) 是损失的主要来源.
- 从未受到干扰和二级森林生长中获得的收益 (分别为0.33 ± 0.13 PgC和0.33 ± 0.05 PgC) 不足以抵消损失.
- 人类影响地区的损失随着时间的推移而加剧,特别是在厄尔尼诺年 (60%的总损失).
结论:
- 人类影响的土地利用显著推动了亚马逊地区的AGC损失.
- 森林退化和森林砍伐需要紧急的政策干预和控制措施.
- 持续监测和有效的保护策略对于保持亚马逊的碳库存至关重要.
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