绿色屋顶在建设碳汇方面有多有效? 经验证据将美国大平原的基质,深度和植被动态联系在一起
M M Lekhon Alam1, Lee R Skabelund2, Charles W Rice3
1Department of Technology Systems, East Carolina University, NC, USA.
Journal of environmental management
|November 29, 2025
概括
绿色屋顶有效地储存碳,特别是在低密度基板上的原生草. 较浅的基板层增强碳封存,以缓解美国大平原地区的气候变化.
科学领域:
- 环境科学 环境科学
- 建筑科学 建筑科学
- 生态生态学 生态生态学
背景情况:
- 绿色屋顶对于减缓气候变化至关重要.
- 了解美国大平原生物气候地区的绿色屋顶中的碳储存至关重要.
研究的目的:
- 为了检查绿色屋顶在不同基底深度和类型下的碳储存能力.
- 评估不同植被混合物对绿色屋顶系统中碳捕获的影响.
主要方法:
- 一项为期两年的研究 (2019-2020) 用两个基板材料 (R:低密度,K:密度) 分析了深度为10和20厘米的绿色屋顶床.
- 测试了三种植物混合物 (仅有Sedum,Sedum + 原生草,原生草 + forbs).
- 土壤分析包括微生物群落组成,有机碳和,呼吸和根生物质.
主要成果:
- 基质R (散体密度低) 比基质K显示每体积单位更多的碳储存.
- 植被,特别是本土草,显著影响了基板碳保留和微生物活动.
- 基板R和本土草的组合实现了最高的总体碳储存.
结论:
- 使用较浅的绿色屋顶基板层与像基板R这样的低密度材料增强了碳储存.
- 绿色屋顶作为碳吸收器的有效性取决于基板的水分保留,深度和植被诱导的根生物质.
- 优化绿色屋顶设计可以改善美国大平原地区的气候变化缓解.
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