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城市地区二氧化碳流量的复杂性:与自然表面的比较
Lu Zhang1, Hongsheng Zhang1, Qianhui Li2
1Laboratory for Climate and Ocean-Atmosphere Studies, Department of Atmospheric and Oceanic Sciences, School of Physics, Peking University, Beijing 100871, PR China.
The Science of the total environment
|June 26, 2023
概括
乱的二氧化碳 (CO2) 运输在城市地区是复杂的,与自然环境不同. 二氧化碳的运输与城市的热量和水蒸气有很大的不同,这是由于异质的来源和汇集器.
科学领域:
- 大气科学 大气科学
- 环境科学 环境科学
- 地质物理学 地质物理学
背景情况:
- 像二氧化碳,热量和水蒸气这样的标量体的流运输对于理解大气过程至关重要.
- 标尺运输中的不相似性可能来自源/沉分布和大气条件.
研究的目的:
- 研究乱的二氧化碳运输的特征及其与自然和城市环境中的热和水蒸气不相似之处.
- 为量化标量运输相似性提出一个新的指数 (TS).
- 解释城市地区二氧化碳运输的复杂性.
主要方法:
- 分析乱的CO2,热量和水蒸气运输特征.
- 开发和应用一种新的运输相似性 (TS) 指数.
- 在不同的大气不稳定性和风向下对标尺传输的研究.
- 使用流量足迹分析解释观察到的运输模式.
主要成果:
- 在自然区域,二氧化碳,热量和水蒸气的运输是相似的,由热雾驱动,特别是在大气高度不稳定的情况下.
- 在城市地区,二氧化碳运输与热量和水蒸气显著不同,热雾的影响不那么明显.
- 城市二氧化碳流量因风向和城市功能区域而变化很大.
- 异质的城市来源/下沉点和不同的流量足迹导致二氧化碳来源和下沉点主导的交通之间发生转变.
结论:
- 城市环境对乱的二氧化碳运输带来了显著的复杂性,破坏了它与热和水蒸气运输的相似性.
- 空间有限的城市来源和下水槽,以及动态流量足迹,掩盖了在二氧化碳运输中连贯结构的作用.
- 了解这些城市交通复杂性对于准确建模全球碳循环至关重要.
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