探索植被和气候因素对中国陆地蒸发转化变化的贡献
Yibo Xue1, Yayong Xue1, Meizhu Chen2
1College of Geography and Remote Sensing Sciences, Xinjiang University, Urumqi 830046, China.
The Science of the total environment
|February 13, 2025
概括
由于全球变暖,了解中国的水循环至关重要. 这项研究分析了蒸发 (ET) 和透气 (T) 的趋势,发现干旱地区的T和ET增长率高于潮湿地区.
科学领域:
- 地球和环境科学 地球和环境科学
- 水文学的水文学
- 气候科学 气候科学
背景情况:
- 蒸发转化 (ET) 是全球水循环的关键组成部分,影响水,碳和能量交换.
- 了解中国陆地ET的时空动态至关重要,特别是全球变暖加剧了水循环.
- 之前的研究已经强调了ET的区域差异的重要性,但需要对中国多样化的气候区进行全面分析.
研究的目的:
- 从1982年到2022年,分析中国的气流 (T) 和ET的时空变化.
- 调查中国不同地区的T/ET比率的趋势.
- 确定影响中国干旱/半干旱 (ASA) 和潮湿/半潮湿 (HSH) 地区T,ET和T/ET的主要驱动因素.
主要方法:
- 使用干旱度指数 (AI) 将中国划分为ASA和HSH次区域.
- 使用全球土地蒸发阿姆斯特丹模型 (GLEAM) v3.8a数据集用于T,ET和T/ET分析.
- 应用林德曼-梅伦达-金 (LMG) 分析来确定控制因素的贡献.
主要成果:
- 在中国各地的T,ET和T/ET中观察到显著的跨年变化趋势.
- 在ASA地区,T (1.18 mm/a) 和ET (1.61 mm/a) 的增长率高于HSH地区 (T: 0.81 mm/a,ET: 1.31 mm/a).
- 蒸汽压力缺陷 (VPD) 主要在总和HSH区域驱动T,而NDVI在ASA占主导地位. 温度 (TEM) 是总和HSH中ET的主要驱动因素,而降水 (PRE) 在ASA中是关键因素. 在总和HSH中,PRE对T/ET的影响最大,而在ASA中,NDVI占主导地位.
结论:
- 中国的陆地ET及其组成部分显示出明显的区域趋势,干旱地区的增长速度更快.
- 不同的气候驱动因素在中国不同地理区域显著影响T,ET和T/ET比率.
- 这些发现凸显了针对气候变化的区域具体水资源管理战略的必要性.
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