在欧洲碳模型中包括土地管理,并向海洋横向转移
Arthur N Fendrich1, Philippe Ciais2, Panos Panagos3
1European Commission, Joint Research Centre (JRC), Ispra, VA, Italy; Laboratoire des Sciences du Climat et de l'Environnement, CEA-CNRS-UVSQ-UPSACLAY, 91190, Gif sur Yvette, France; Université Paris-Saclay, INRAE, AgroParisTech, UMR SAD-APT, 91120, Palaiseau, France.
Environmental research
|December 27, 2023
概括
覆盖作物 (CCs) 可以增加土壤有机碳 (SOC) 储存量,并减少对海洋的微粒有机碳 (POC) 出口. 它们对SOC和POC出口的积极影响是持久的,无论是CC.
科学领域:
- 农业科学 农业科学
- 环境科学 环境科学
- 土壤科学 土壤科学
- 气候科学 气候科学
背景情况:
- 覆盖作物 (CCs) 提供诸如减少土壤侵蚀和增加土壤有机碳 (SOC) 储存等好处.
- 由于沉积物-碳侵蚀方案的局限性,目前的陆地表面模型难以准确地代表大规模的CC影响.
- 为了全面了解CC对农业系统的影响,需要先进的建模能力.
研究的目的:
- 开发和应用一个空间分布式模型 (CE-DYNAM),模拟侵蚀对土壤碳预算的历史影响.
- 评估在大陆范围内引入CC对SOC储存和微粒有机碳 (POC) 出口的影响.
- 在不同的政策情景下,评估CC对碳循环的影响的时间动态和持续性.
主要方法:
- 利用空间分布的CE-DYNAM模型,将侵蚀,运输和沉积与陆地碳模型模拟器结合起来.
- 自工业时代以来,模拟的历史气候和土地利用迫使我们描述大陆规模的土壤碳预算.
- 评估了两种以政策为导向的情景,用于在欧洲作物系统中引入CC,重点是侵蚀和酸盐易感性.
主要成果:
- 欧洲在过去十年中向海洋出口的POC估计为每年1.95TgC.
- 采用CC导致SOC储存增加,在10年后达到峰值,POC出口减少,在13年后稳定.
- 发现CC对SOC储存和POC出口减少的积极影响是持久的,无论它们的空间分配如何.
结论:
- CC可以同时增强SOC储存并减少POC向海洋的出口,从而有助于碳捕获.
- CC采用的时间动态至关重要,随着时间的推移,影响变得显著和持久.
- 虽然有好处,但单独的CC可能不足以实现像4‰倡议这样雄心勃勃的气候目标.
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