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延迟叶子变绿与中国的细颗粒物空气污染有关
Wendi Qu1,2, Hao Hua1,2, Ting Yang3
1The Key Laboratory of Land Surface Pattern and Simulation, Institute of Geographical Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing, China.
Nature communications
|April 10, 2025
概括
细颗粒物 (PM2.5) 污染延迟了植物的绿化日期,减少了碳吸收,抵消了气候变暖的好处. 这种空气污染影响着中国.
科学领域:
- 环境科学 环境科学
- 生态生态学 生态生态学
- 大气科学 大气科学
背景情况:
- 气候变暖推进了叶子绿化日期 (GUD) 和土地表面绿化.
- 颗粒污染对植物现象学和碳吸收的影响尚不清楚.
研究的目的:
- 调查细颗粒物 (PM2.5) 对中国植物绿化日期和碳吸收的影响.
- 评估PM2.5污染如何影响现象模型和碳中和目标.
主要方法:
- 在中国20多年来对GUD和PM2.5进行地面和卫星观测的分析.
- 评估PM2.5对植物生长的冷却和热量需求的影响.
- 将PM2.5影响纳入现象学模型.
主要成果:
- PM2.5污染与延迟GUD和减少植物碳吸收有关,从而抵消气候驱动的绿化.
- 污染延迟与增加的冷却需求和热量需求有关.
- PM2.5降低了光合作用活性辐射和碳氧化率,削弱了植物的光合作用能力.
结论:
- PM2.5空气污染对中国的植物现象学和碳吸收产生了负面影响.
- 现象学模型预测到2060年,当包括PM2.5影响时,GUD会出现显著的延迟.
- 空气污染给中国的碳中和目标带来了不确定性,并产生了广泛的生态系统和政策影响.
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