审查不同因素在确定中国上空潜在蒸发透气变化的贡献
Yuchen Shen1, Qirong Wang2, Zhongxiao Feng2
1Wuxi Meteorological Bureau, Wuxi, Jiangsu, China.
PloS one
|April 16, 2024
概括
中国的潜在蒸发透气 (PET) 显示季节性变化和区域趋势. 阳光时间和温度显著影响PET,不同季节和地区的贡献不同.
科学领域:
- 气候学 气候学 气候学
- 水文学 水文学
- 环境科学 环境科学
背景情况:
- 潜在的蒸发转化 (PET) 是水循环的关键组成部分,影响水文过程和农业生产力.
- 了解PET的长期趋势和导致的气象因素对于水资源管理和气候变化适应至关重要.
研究的目的:
- 从1961年到2022年,分析中国各地每日潜在蒸发 (PET) 的长期趋势.
- 调查PET趋势的季节性和区域性变化.
- 量化气象因素 (温度,日照时间,风速,相对湿度) 对观察到的PET趋势的贡献.
主要方法:
- 利用中国各地的温度,日照时间,风速和相对湿度的每日网格观测数据 (1961-2022年).
- 使用粮食及农业组织 (FAO) 推的Penman-Monteith方法计算每日PET.
- 分析了中国6个地区和4个季节的长期趋势以及各个气象因素对PET趋势的贡献.
主要成果:
- 聚乙烯呈现出明显的季节性模式,夏季达到高峰 (145640毫米),冬季达到最低 (21244毫米).
- 空间PET趋势显示,中国东部普遍下降,中国西部增加,夏季下降最为显著,冬季增加最为显著.
- 气象因素对PET趋势的贡献因地区和季节而异,许多地区的日照时间和温度是重要的驱动因素,特别是在夏季和冬季.
结论:
- 中国的PET趋势受到气象因素的复杂相互作用的影响,区域和季节差异很大.
- 调查结果强调需要在水资源管理和气候变化适应方面制定区域具体战略.
- 持续监测和分析PET趋势对于了解中国不断变化的水文景观至关重要.
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