在中国受热带气旋影响的气象和农业干旱之间的时空空间联系
Yankang Gao1, Tongtiegang Zhao1, Tongbi Tu1
1Southern Marine Science and Engineering Guangdong Laboratory (Zhuhai) and School of Civil Engineering, Sun Yat-Sen University, Guangzhou, China.
The Science of the total environment
|December 9, 2023
概括
热带气旋 (TCs) 显著缓解气象和农业干旱,结束大多数小规模事件并减少它们的面积. 气候变化也改变了干旱的传播,尽管一些严重的干旱发生在气旋后.
科学领域:
- 环境科学 环境科学
- 气候科学 气候科学
- 自然灾害 自然灾害
背景情况:
- 干旱和热带气旋 (TCs) 是全球主要的自然灾害.
- 了解TC和干旱动态之间的相互作用对于灾害管理至关重要.
研究的目的:
- 研究TC对气象干旱 (MD) 和农业干旱 (AD) 之间的联系的影响.
- 量化干旱事件特征和受TCs影响的传播特征的变化.
- 评估TC对干旱的缓解和加剧影响.
主要方法:
- 利用三维连接组件算法来分析干旱事件的特征.
- 干旱事件传播特征和时空联系的量化变化.
- 运用斯皮尔曼的相关性来识别导致干旱恶化的因素在TCs后.
主要成果:
- 主要是缓解MD和AD的TC,终止了98%以上的小规模干旱事件.
- 技术中心将小规模MD的总面积减少65%,AD的总面积减少32%.
- TCs降低干旱传播率,改善干旱对有效传播的特征,同时在特定地区有助于TC后干旱恶化.
结论:
- 工业干旱具有显著的,广泛的干旱缓解效应,特别是在较小的事件上.
- 在气象和农业干旱之间,TC重新塑造了时空动态.
- 经过TC的干旱恶化与减少的水分出口有关,可能受到TC诱导的冷却的影响.
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