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在伊朗不同气候盆地,从气象干旱到农业干旱的传播途径

Mehdi Mohammadi Ghaleni^1,2, Saeed Sharafi³, Mahmood Sadat-Noori⁴

¹Department of Water Science and Engineering, Arak University, Arak, Iran. m-mohammadighaleni@araku.ac.ir.

Environmental science and pollution research international

|October 3, 2024

概括

气象干旱 (MD) 转变为农业干旱 (AD) 在潮湿气候中比超干旱气候更快. 了解这种干旱传播是更好的风险管理和早期预警的关键.

科学领域:

水文学的水文学
气候学气候学气候学
农业科学农业科学

背景情况:

干旱从气象影响传播到农业影响是复杂的.
气候类型对从气象干旱 (MD) 到农业干旱 (AD) 的过渡有重大影响.
了解这些动态对于有效的干旱风险管理至关重要.

研究的目的:

调查干旱传播的特征,包括速度,延迟和响应时间,从MD到AD在伊朗.
分析伊朗各地多样化的气候条件如何影响干旱蔓延.
评估气象和农业干旱指数之间的关系.

主要方法:

使用了标准化降水蒸发指数 (SPEI),标准化降水指数 (SPI) 和标准化土壤湿度指数 (SSI).
从30个伊朗盆地 (1979-2021) 分析了现场和ERA5数据集.
在不同气候类型中确定了主要的干旱事件并计算了相关系数,响应时间和滞后时间.

主要成果:

在超干旱到潮湿的气候中,MD和AD指数之间的相关性从0.75降至0.44.
响应时间在2.42至6.63个月之间,受SPI/SPEI和SSI相关性影响.
滞后时间在超干旱/干旱地区从2个月到6个月不等,与潮湿盆地相比,有1-3个月的差异.
传播速度表明,在潮湿的气候与超干旱的气候中,敏感性更高.

结论:

干旱传播动态在伊朗各个气候区之间有很大差异.
潮湿的气候表现出更快,更敏感的从气象干旱到农业干旱的过渡.
调查结果强调了气候特异性分析对于干旱预测,预警系统和风险准备的重要性.

关键词:

农业干旱农业干旱控制因素控制因素干旱的传播方式伊朗伊朗伊朗伊朗响应时间响应时间

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