种植树:生物质碳捕获和对净零目标的贡献
Sofia Biffi1, Pippa J Chapman1, Richard P Grayson1
1University of Leeds, School of Geography, Seminary St, Woodhouse, Leeds LS2 9JT, UK.
The Science of the total environment
|May 31, 2023
概括
树种植通过捕获大气中的二氧化碳,显著有助于缓解气候变化. 为了到2050年实现英国的净零目标,种植率必须大幅增加,在生物质和土壤中储存大量碳.
科学领域:
- 环境科学 环境科学
- 农业科学 农业科学
- 气候变化缓解缓解 气候变化缓解
背景情况:
- 农林实践,包括种植树,对于减缓气候变化至关重要.
- 评估对冲对国家净零目标的贡献至关重要.
研究的目的:
- 评估不同种植树率对英国到2050年净零目标的影响.
- 分析本地树种的碳捕集率.
主要方法:
- 对本土树种的碳含量进行分析.
- 通过对已知年龄的围进行破坏性采样来确定地面生物质 (AGB) 碳库存.
- 根据对冲年龄计算AGB年度平均碳封存率.
主要成果:
- AGB C 库存从年轻的对冲中的 8.34 Mg C ha-1 变化到老的对冲中的 40.42 Mg C ha-1.
- 年平均AGB C封存率在年轻中最高 (2.09 Mg C ha-1 yr-1),并且随着年龄的增长而下降.
- 目前的种植率不足以实现英国2050年净零目标;需要增加7148.1公里/年的种植率.
结论:
- 广泛种植树可以大大促进大气二氧化碳的捕获和储存.
- 为了在2050年之前实现英国对冲长度增加40%的目标,目前的种植率需要增加四倍.
- 40多年来,增加种植可以储存大量的二氧化碳,并抵消英国农业排放的显著比例.
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