土壤湿度对不同气候条件下的土地表面能量分割的影响范式
Xiao Chen1, Zhihua Pan1, Binxiang Huang1
1College of Resources and Environmental Sciences, China Agricultural University, Beijing, China; CMA-CAU Joint Laboratory of Agriculture Addressing Climate Change, Beijing, China.
The Science of the total environment
|January 26, 2024
概括
土壤湿度显著影响着陆地与大气的相互作用和极端天气. 全球分析揭示了五种不同的土壤湿度影响范式,过渡范式自1981年以来一直在增加.
科学领域:
- 地球系统科学 地球系统科学
- 气候科学 气候科学
- 水文学的水文学
背景情况:
- 土壤湿度 (SM) 是控制土地表面能量分割的关键因素.
- 在不同的气候条件下,其复杂的影响尚未完全理解.
- 了解这些相互作用对于预测极端天气事件至关重要.
研究的目的:
- 为了检查土壤水分和地表能量在不同气候条件下的分割之间的关系.
- 确定土壤水分对能源分区有不同的影响范式.
- 分析这些范式的长期变化及其全球影响.
主要方法:
- 对土壤湿度数据和表面能量分区的分析.
- 确定了五种全球影响范式:温湿 (WW),过渡 (TP),温干 (WD),冷湿 (CW) 和冷 (CP).
- 研究温度和大气干旱度 (VPD) 对这些范式的影响.
主要成果:
- 温度和VPD明确决定了物理过程 (蒸发,土壤结/解) 对能量分割的影响.
- 确定了五种不同的全球性模式,对土壤湿度的影响.
- 自1981年以来,过渡性范式 (TP) 显示了全球面积比例的明显增加.
- 这些影响的关键土壤湿度值因地区而异,全球平均为0.45 m3/m3.
结论:
- 所识别的范式及其不断变化的趋势为加剧陆地与大气相互作用提供了新的见解.
- 这些发现对理解全球变暖和热浪形成有重大影响.
- 关键土壤湿度值的区域差异突显了本地气候模型的必要性.
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