新兴的跨欧亚热浪干旱火车在一个变暖的气候.
Jee-Hoon Jeong1, Min-Seok Kim2, Jin-Ho Yoon3
1Department of Environment and Energy, Sejong University, Seoul, South Korea.
Science advances
|May 2, 2025
概括
一种新的大气模式,即跨欧亚热浪-干旱列车,正在加剧整个欧亚大陆的夏季热浪和干旱. 最近的事件是前所未有的,标志着由于全球变暖而导致气候模式发生重大转变.
科学领域:
- 大气科学 大气科学
- 气候动力学 气候动力学
- 古气候学 古气候学
背景情况:
- 20世纪后期出现了跨欧亚热浪干旱列车,一种大气远程连接模式.
- 这种模式与夏季在东欧和东亚地区同时增加的热浪干旱事件有关.
- 从历史上看,环球远程连接主导了欧亚热浪,但它没有显示当前全球变暖的趋势.
研究的目的:
- 为了调查跨欧亚热浪干旱火车的加剧.
- 为了将这种新兴模式的近期趋势与历史气候数据进行比较.
- 确定推动欧亚气候模式转变的潜在机制.
主要方法:
- 对跨越三个世纪的树环代理的分析,以重建历史气候数据.
- 新兴的跨欧亚模式与历史的环球电信连接的比较.
- 研究大气机制,包括罗斯比波传播,海面温度和陆地-大气相互作用.
- 利用气候模型来预测未来的趋势.
主要成果:
- 近期跨欧亚热浪干旱列车的强度在过去三个世纪中是前所未有的.
- 环球电信连接,历史上占主导地位,显示没有全球变暖的趋势.
- 这种模式是由与北大西洋海面温度和萨赫勒地区降水相关的罗斯比波传播驱动的,由人为变暖和自然变化放大.
- 由于土壤水分缺陷,土地与大气的相互作用进一步推动了区域强化.
结论:
- 跨欧亚热浪干旱列车代表了欧亚热浪干旱气候学的重大和前所未有的转变.
- 这种新出现的模式是由自然变化和人为变暖的结合驱动的.
- 气候模型预测,在整个21世纪,这种模式将继续增强.
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