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<p>Land carbon fluxes are key to the Paris Agreement. However, data comparability issues persist between countries’ land greenhouse gas inventories and mitigation targets, and what land models (bookkeeping and integrated assessments) provide as Paris-aligned benchmarks for land. As a result, the Global Stocktake, aiming to track collective mitigation progress, did not explicitly consider country targets for land. This blind spot leaves countries uninformed of the 2030 gap between their ambitions for mitigation on land and models’ benchmarks. Here we track the contribution and evolution of land-related targets under countries’ 2020 Nationally Determined Contributions, splitting land pledges between reduced emissions and additional sinks. Land retains a quarter of the global mitigation pledges in 2030, mostly relying on external support (−1.5ǂ1.1 GtCO<sub>2</sub>e/yr), of which −0.55 GtCO<sub>2</sub>e/yr are additional sinks. It is crucial that future Global Stocktakes include appropriate comparisons between modelled and country-provided land use net emissions. We here offer some concrete suggestions.</p>

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Land remains a blind spot in tracking progress under the Paris Agreement due to lack of data comparability

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年7月28日

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  • Rosa M. Roman-Cuesta,
  • Michel den Elzen,
  • Zuelclady Araujo-Gutierrez,
  • Nicklas Forsell,
  • William F. Lamb,
  • Emily McGlynn,
  • Joana Melo,
  • Simone Rossi,
  • Malte Meinshausen,
  • Sandro Federici,
  • Matthew Gidden,
  • Kimon Keramidas,
  • Anu Korosuo,
  • Giacomo Grassi

摘要

Land carbon fluxes are key to the Paris Agreement. However, data comparability issues persist between countries’ land greenhouse gas inventories and mitigation targets, and what land models (bookkeeping and integrated assessments) provide as Paris-aligned benchmarks for land. As a result, the Global Stocktake, aiming to track collective mitigation progress, did not explicitly consider country targets for land. This blind spot leaves countries uninformed of the 2030 gap between their ambitions for mitigation on land and models’ benchmarks. Here we track the contribution and evolution of land-related targets under countries’ 2020 Nationally Determined Contributions, splitting land pledges between reduced emissions and additional sinks. Land retains a quarter of the global mitigation pledges in 2030, mostly relying on external support (−1.5ǂ1.1 GtCO2e/yr), of which −0.55 GtCO2e/yr are additional sinks. It is crucial that future Global Stocktakes include appropriate comparisons between modelled and country-provided land use net emissions. We here offer some concrete suggestions.