土地使用/覆盖面的变化导致干旱地区的碳储量减少 - - 中国西北地区的案例研究.
1Faculty of Geomatics, Lanzhou Jiaotong University, Lanzhou 730070, China; Post-doctorate Workstation, Sanhe Digital Surveying and Geographic Information Technology Company, Tianshui 741000, China.
The Science of the total environment
|June 28, 2025
概括
这项研究开发了Arid_InVEST模型来评估干旱地区的碳储存,发现土壤无机碳至关重要. 预计到2100年,土地利用变化将减少碳储存.
科学领域:
- 生态系统的碳循环循环.
- 气候变化缓解缓解 气候变化缓解
- 干旱土地的管理.
背景情况:
- 陆地生态系统对于通过碳池保护来缓解气候变化至关重要.
- 准确的碳储存评估是理解全球碳循环的关键.
- 土壤无机碳 (SIC) 是干旱地区重要的,但经常被忽视的碳池.
研究的目的:
- 开发和应用Arid_InVEST模型,将土壤无机碳 (SIC) 整合到生态系统碳池评估中.
- 分析土地覆盖变化对干旱环境30年碳储存动态的影响,并预测未来的趋势.
- 在气候变化情景下,为了解和管理干旱地区的碳储存提供一个新的框架.
主要方法:
- 修改了InVEST碳模块,以创建Arid_InVEST模型,其中包括土壤无机碳 (SIC) 池.
- 在过去的30年中使用Arid_InVEST模型评估陆地生态系统的碳储存.
- 根据各种共享社会经济路径-代表性度路径 (SSP-RCP) 情景,预测未来80年的碳储存趋势.
主要成果:
- 在过去的30年里,耕地增加了23.5%,而荒地显著减少.
- 土壤无机碳 (SIC) 占干旱土地总碳储量的46.10%,森林,草原和耕地密度最高.
- 根据SSP场景的预计土地利用和土地覆盖变化 (LUCC) 表明,由于草原退化和城市扩张,总体碳储量下降,在SSP585.5下,到2100年可能减少24.1%.
结论:
- 通过包括SIC,Arid_InVEST模型提供了一种全面的方法来评估干旱地区的碳储存动态.
- 土地利用和土地覆盖的变化对干旱生态系统的碳储存产生了重大影响,需要针对性的气候政策.
- 这项研究为制定有效的气候减缓战略和在干旱环境中实现双碳目标提供了关键的见解.
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