The potential of urban irrigation for counteracting carbon-climate feedback
The potential of urban irrigation for counteracting carbon-climate feedback
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DOI：
10.1038/s41467-024-46826-3
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发表时间：
2024-03-18
影响因子：
16.6
通讯作者：
Wang，Chenghao
中科院分区：
文献类型：
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作者：
Li，Peiyuan;Wang，Zhi-Hua;Wang，Chenghao
全球气候变化，特别是由于二氧化碳 (CO2) 浓度增加而导致的全球平均气温上升，反过来又会导致人为和生物温室气体排放量增加。这可能会导致地球气候系统中气候-碳反馈的正循环，这就需要采取可持续的环境战略来减少热量和碳排放，例如城市绿化。在这项研究中，我们调查了美国邻近城市绿地的城市灌溉对环境温度和二氧化碳交换的影响。我们的建模结果表明，在潮湿气候下，城市生态系统呼吸的碳释放因蒸发冷却而减少，但在干旱/半干旱地区，由于土壤湿度增加而增加。一般来说，灌溉带来的热量和碳减排环境协同效益与城市绿化率正相关，并有可能帮助抵消建筑环境中的气候-碳反馈。
Global climate changes, especially the rise of global mean temperature due to the increased carbon dioxide (CO2) concentration, can, in turn, result in higher anthropogenic and biogenic greenhouse gas emissions. This potentially leads to a positive loop of climate–carbon feedback in the Earth’s climate system, which calls for sustainable environmental strategies that can mitigate both heat and carbon emissions, such as urban greening. In this study, we investigate the impact of urban irrigation over green spaces on ambient temperatures and CO2exchange across major cities in the contiguous United States. Our modeling results indicate that the carbon release from urban ecosystem respiration is reduced by evaporative cooling in humid climate, but promoted in arid/semi-arid regions due to increased soil moisture. The irrigation-induced environmental co-benefit in heat and carbon mitigation is, in general, positively correlated with urban greening fraction and has the potential to help counteract climate–carbon feedback in the built environment.