模拟美国南部松树种植园中的木材产品碳流:对碳储存的影响
Sarah J Puls1, Rachel L Cook2, Justin S Baker2
1Department Forestry and Environmental Resources, North Carolina State University, Raleigh, NC, 27695, USA. sjpuls@ncsu.edu.
Carbon balance and management
|February 21, 2024
概括
木制品储存大量的碳,但优化收获和产品生命周期是关键. 复合日志和更长的产品寿命最大限度地储存碳,而更短的旋转有利于高生产率的网站.
科学领域:
- 林业科学 林业科学
- 环境科学环境科学
- 碳循环研究 碳循环研究
背景情况:
- 木制品在长期储存碳方面发挥着至关重要的作用,从被砍伐的森林中隔离碳.
- 有效的森林部门碳建模需要将木材产品碳与其森林来源联系起来,并随着时间的推移计算in situ和ex situ碳池.
- 了解森林和木材产品池中碳捕获之间的权衡对于准确的气候减缓评估至关重要.
研究的目的:
- 为基于土地和生物产品的碳减排战略开发一个决策支持工具.
- 量化碳储存和碳排放与美国南部松树收获的木制品相关.
- 确定影响不同木材产品类型和森林管理实践中碳储存效率的因素.
主要方法:
- 使用生命周期评估 (LCA) 方法来追踪从木材采伐到排放的碳.
- 模拟碳流用于美国南部的小松树和短叶松树木的采伐.
- 在120年的时间里,比较了不同类型的日志的碳储存效率,包括复合材料和木日志.
主要成果:
- 来自美国南部松树收获的木制品在进入市场时储存了估计29.7万亿,120年后仍有11.4万亿.
- 来自木材产品生命周期 (采购,运输,制造) 的化石燃料排放量估计为每年43.3万二氧化碳.
- 复合木材的碳储存效率更高 (在120年内,每木材的碳储存效率是木材的1.8倍).
结论:
- 优化基于场地生产力的森林旋转长度可以增强碳储存.
- 通过回收减少垃圾填埋场的甲排放和延长木制品 (如波纸箱) 的寿命,可以显著增加碳的增加.
- 高林地生产率有利于现场和现场碳池,这表明更短的旋转可能是生产性土地上碳储存的最佳选择.
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