植被增加了全球气候脆弱性风险,因为气候区因大气中二氧化碳升而变化
Mingzhu He1, Jiangpeng Cui2, Yonghong Yi3
1Joint International Research Laboratory of Catastrophe Simulation and Systemic Risk Governance, Beijing Normal University, Zhuhai 519087, China; School of National Safety and Emergency Management, Beijing Normal University, Zhuhai 519807, China.
The Science of the total environment
|July 25, 2024
概括
大气中二氧化碳 (CO2) 的增加推动了全球气候区的变化,植被生理反应对这些变化产生了重大影响. 了解这些转变对于识别脆弱地区和确保生态和社会安全至关重要.
科学领域:
- 气候科学 气候科学
- 生态生态学 生态生态学
- 地球系统科学 地球系统科学
背景情况:
- 全球气候区由于大气二氧化碳的上升而发生转变,影响植被和生态系统的稳定性.
- 升高的二氧化碳对气候区转移速度的确切影响仍然不确定.
- 了解区域气候对二氧化碳增加的脆弱性,对于生态和社会安全至关重要.
研究的目的:
- 通过使用地球系统模型,研究全球气候区在二氧化碳上升下的变化.
- 量化植被生理反应 (PHY) 在这些变化中的作用.
- 根据气候区变化的程度,识别和分类气候脆弱地区.
主要方法:
- 利用了来自合模型相互比较项目第6阶段 (CMIP6) 的9个地球系统模型.
- 在高二氧化碳度下 (4 × CO2) 分析了气候区的变化.
- 量化了植被生理反应 (PHY) 对气候区变化的贡献,包括降水变化和与变暖的相互作用.
主要成果:
- 在全球一半以上的陆地面积上观察到气候区的变化.
- 植物生理反应占这些变化的16.8%,在4×CO2的温度下.
- 由PHY诱导的降水变化及其与变暖的相互作用解释了大约五分之二的PHY强迫转移.
- 显著的气候区转移,影响生态系统结构和功能,预计全球四倍二氧化碳的土地面积的五分之一.
结论:
- 二氧化碳的增加,特别是通过植被生理反应,推动了全球气候区的重大变化.
- 经历重大转变的地区面临高度脆弱性,包括气候极端,水资源短缺和粮食不安全的风险.
- 该研究量化确定了脆弱地区及其驱动因素,为全球生态和社会安全的保护和恢复工作提供了信息.
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