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动态路径将巴基斯坦洪水与东亚热浪联系起来
Zheng-Hang Fu1, Wen Zhou1,2, Shang-Ping Xie3
1Key Laboratory of Polar Atmosphere-ocean-ice System for Weather and Climate, Ministry of Education, Department of Atmospheric and Oceanic Sciences & Institute of Atmospheric Sciences, Fudan University, Shanghai, China.
Science advances
|April 24, 2024
概括
巴基斯坦 巴基斯坦 巴基斯坦.
科学领域:
- 大气科学 大气科学
- 气候动力学 气候动力学
- 极端天气事件 极端天气事件
背景情况:
- 巴基斯坦的历史性洪水和中国的创纪录的热浪发生在2022年7月至8月.
- 在过去的44年里,这些地区之间发生了类似的极端天气事件.
- 连接这些事件的潜在机制以前不清楚.
研究的目的:
- 研究将巴基斯坦极端天气事件与东亚热浪联系在一起的动态机制.
- 为了确定这种联系是否与气候系统固有或受海洋表面温度的影响.
- 评估这些极端事件的季后预测潜力.
主要方法:
- 对观测数据的分析.
- 进行了一系列大气模型实验.
- 使用大气模型组合模拟.
主要成果:
- 来自巴基斯坦对流加热的高热层分离风在中国上空产生反气旋,造成热浪.
- 这种动态路径在很大程度上独立于全球海面温度强迫.
- 该连接在7月至8月最活跃,原因是巴基斯坦的高对流变性.
结论:
- 巴基斯坦洪水和东亚热浪之间通过上热带层波传播存在明显的动态联系.
- 这种联系是气候系统的内在特征.
- 鉴定的机制和时间延迟为改善东亚季后极端事件预测提供了潜力.
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