全球基于流量的评估显示,在未来气候变化情景中,小麦的臭氧风险正在下降
Pierluigi R Guaita1,2, Riccardo Marzuoli1, Leiming Zhang3
1Department of Mathematics and Physics, Catholic University of the Sacred Heart, Brescia, Italy.
Global change biology
|December 11, 2025
概括
热带层臭氧 (O3) 对小麦生产构成威胁. 本研究使用基于流量的模型来评估未来的O3风险,发现排放政策和二氧化碳水平对全球作物损失产生重大影响.
科学领域:
- 环境科学 环境科学
- 农业科学 农业科学
- 气候科学 气候科学
背景情况:
- 热带层臭氧 (O3) 是一个重要的空气污染物,影响作物产量和全球粮食安全.
- 目前的评估经常使用基于暴露的指标,忽视了关键的植物环境相互作用,这些相互作用调节了植物吸收O3.
研究的目的:
- 从2000年到2100年对小麦 (Triticum aestivum) 未来的O3风险进行基于流量的全球评估.
- 在各种气候场景下量化植物毒性O3剂量 (POD6) 和生产损失,并探索影响因素.
- 分析区域趋势和土壤水,二氧化碳,辐射强迫和排放政策对O3风险的影响.
主要方法:
- 利用由CMIP6.6的地球系统模型驱动的双槽干沉积模型.
- 在三个共享社会经济路径 (SSP) 下对小麦进行模拟的O3风险:SSP1-2.6,SSP3-7.0和SSP5-8.5.5.
- 在风险评估中纳入诸如土壤水的可用性,大气中的CO2,辐射强迫和排放政策等因素.
主要成果:
- 全球预计O3风险将普遍下降,但区域差异很大.
- 根据SSP1-2.6 (强有力的排放政策,低辐射强迫),全球平均小麦生产损失在本世纪末显著下降.
- SSP3-7.0 (弱排放政策,高辐射强迫) 可能会增加南亚和东亚,南美洲和撒哈拉以南非洲的O3风险.
- 增加的二氧化碳度很可能通过减少口腔导电性来减轻O3风险,尽管西藏高原附近可能仍然存在热点.
结论:
- 未来对小麦的O3风险因社会经济路径,特别是排放政策和辐射强迫而有很大差异.
- 考虑到气候变化和空气污染的局部影响,为减少小麦的O3损害,区域特定的缓解策略至关重要.
- 该研究强调了基于流量的指标对基于暴露的指标对于准确的O3风险评估在农业中的重要性.
关键词:
在CMIP6中,CMIP6是CMIP6.二氧化碳二氧化碳二氧化碳在ESM上,我们可以看到.POD6 POD6 在线播放这是SSP的SSP.干燥沉积的沉积方式粮食安全 粮食安全声管导电性 声管导电性 声管导电性收益率损失收益率损失的情况更多相关视频
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