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揭示了在人为变暖下欧亚年度温度周期的变化
1State Key Laboratory of Severe Weather Meteorological Science and Technology, Chinese Academy of Meteorological Sciences, Beijing, 100081, China. yanyh@cma.gov.cn.
Scientific reports
|November 29, 2025
概括
全球变暖正在减少欧亚大陆,特别是西伯利亚的年度温度周期 (ATC) 幅度. 气候模型难以准确模拟这些变化,这表明气候变化研究需要改进.
科学领域:
- 气候科学 气候科学
- 地球系统科学 地球系统科学
- 环境科学 环境科学
背景情况:
- 年度温度周期 (ATC) 对地球的气候和生态系统至关重要,它影响了热带以外的气候和有机变量.
- 在过去的70年中,ATC振幅的观测下降在热带以外的欧亚大陆,特别是西西伯利亚显著.
- 航空管制阶段的长期趋势显示不确定性,在东欧有显著的阶段进步.
研究的目的:
- 调查每年温度周期 (ATC) 幅度和阶段在外热带欧亚大陆地区的长期趋势.
- 评估最先进的气候模型在模拟人为变暖后的ATC变化方面的表现.
- 要将观察到的ATC振幅下降归因于特定的人为强迫.
主要方法:
- 对70年来ATC振幅和相位趋势的长期观测数据的分析.
- 对气候模型模拟与观测数据的评估,重点是对气候变暖的ATC振幅反应.
- 使用气候模型进行初步归因分析,以确定ATC振幅下降的驱动因素.
主要成果:
- 在大多数热带外欧亚陆地观察到ATC振幅的显著下降,西西伯利亚出现明显变化.
- 气候模型低估了ATC振幅下降,揭示了与人为表面变暖相关的强有力的线性约束.
- 温室气体排放被确定为ATC振幅下降的主要驱动因素 西西伯利亚.
- 大多数气候模型不准确地估计了长期的ATC相变.
结论:
- 观察到的ATC振幅下降是一个与人为变暖相关的强趋势,主要是由温室气体排放驱动的.
- 目前的气候模型需要改进,以准确地表示ATC振幅对人为强迫的反应.
- 加强气候模型的开发对于可靠的气候变化检测和归因研究至关重要,特别是在ATC相位转移方面.
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