Scholarlink

<p>Soil carbon changes are difficult to measure globally, and global models are poorly constrained. Here, we propose a framework to map annual changes in soil carbon and litter (SOCL) as the difference between the net land CO<sub>2</sub> flux from atmospheric inversions and satellite-based maps of biomass changes. We show that SOCL accumulated globally at a rate of about 0.34 ± 0.30 ( ± 1 sigma) billion tonnes of carbon per year (PgC yr<sup>−</sup><sup>1</sup>) during 2011-2020. The largest SOCL sink is found in boreal regions (0.93 ± 0.45 PgC yr<sup>−</sup><sup>1</sup> in total) particularly in undisturbed peatlands and managed forests. The largest losses occur in the dry tropics (−0.50 ± 0.47 PgC yr<sup>−</sup><sup>1</sup>) and correspond with agricultural expansion from land use change, cropland management and grazing. By contrast, forests in the wet tropics act as a net soil carbon sink (0.32 ± 0.35 PgC yr<sup>−</sup><sup>1</sup>). Our findings highlight the large mitigation opportunities in the dry tropics to restore agricultural soil carbon.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Land use-induced soil carbon loss in the dry tropics nearly offsets gains in northern lands

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年11月14日

查看全文
  • Huan Wang,
  • Philippe Ciais,
  • Hui Yang,
  • Pete Smith,
  • Giacomo Grassi,
  • Clemens Schwingshackl,
  • Panos Panagos,
  • Yinon Bar-On,
  • Stephen Sitch,
  • Frédéric Chevallier,
  • Paul I. Palmer,
  • Xiaojun Li,
  • Songbai Hong,
  • Jinfeng Chang,
  • Clément Albergel,
  • Lei Fan,
  • Kai Wang,
  • Laibao Liu,
  • Frédéric Frappart,
  • Jean-Pierre Wigneron

摘要

Soil carbon changes are difficult to measure globally, and global models are poorly constrained. Here, we propose a framework to map annual changes in soil carbon and litter (SOCL) as the difference between the net land CO2 flux from atmospheric inversions and satellite-based maps of biomass changes. We show that SOCL accumulated globally at a rate of about 0.34 ± 0.30 ( ± 1 sigma) billion tonnes of carbon per year (PgC yr−1) during 2011-2020. The largest SOCL sink is found in boreal regions (0.93 ± 0.45 PgC yr−1 in total) particularly in undisturbed peatlands and managed forests. The largest losses occur in the dry tropics (−0.50 ± 0.47 PgC yr−1) and correspond with agricultural expansion from land use change, cropland management and grazing. By contrast, forests in the wet tropics act as a net soil carbon sink (0.32 ± 0.35 PgC yr−1). Our findings highlight the large mitigation opportunities in the dry tropics to restore agricultural soil carbon.