城市土壤中的黑碳:土地利用和气候驱动在地表的变化
Molly Burke1,2, Erika Marín-Spiotta3, Alexandra G Ponette-González4,5,6
1Department of Geography and the Environment, University of North Texas, 1155 Union Circle #305279, Denton, TX, 76203, USA.
Carbon balance and management
|March 1, 2024
概括
碳黑 (BC) 是城市土壤有机碳的主要组成部分,特别是在道路和工业区附近. 需要进一步研究在土壤深度和各种气候下对BC储存的情况.
科学领域:
- 环境科学 环境科学
- 土壤科学 土壤科学
- 碳循环是碳循环的过程.
背景情况:
- 黑碳 (BC) 源于化石燃料和生物质的不完全燃烧.
- 城市土壤由于接近排放源而积累BC.
- 全球文献综述综合了来自10个国家的35个城市的数据.
研究的目的:
- 在全球城市土壤中审查和分析黑碳 (BC) 含量.
- 确定BC积累的驱动因素及其对总有机碳 (TOC) 的贡献.
- 评估城市特征,气候和土地利用对BC土壤的影响.
主要方法:
- 在城市土壤中对BC和TOC进行了26项研究的文献审查.
- 收集关于BC含量,TOC,深度,城市,气候和土地使用的数据.
- 由于数据分布,对表面土壤深度 (0-20厘米) 进行了集中分析.
主要成果:
- 城市土壤中的BC含量差异很大 (0-124 mg/g在0-10厘米).
- BC占TOC的很大一部分 (在0-10厘米时的中位数为23%).
- 工业用地和道路的邻近性显示出更高的BC;更温暖,更湿的土壤有更少的BC.
结论:
- 碳黑 (BC) 是城市表面土壤有机碳的主要组成部分.
- 土地利用是BC含量的关键驱动因素,而土地覆盖的影响不太清楚.
- 对深层土壤BC和多样化的气候进行更多的研究对于了解城市碳循环至关重要.
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