基于广义蒸发互补关系的中国长期陆面蒸发量及其变化分析
Long-Term Land Surface Evaporation and Its Changes Estimated by the Generalized Complementary Principle in China
DOI: 10.12677/JWRR.2020.93027, PDF,  被引量    国家自然科学基金支持
作者: 李 曲, 程 磊, 叶林媛, 刘 攀, 熊立华:武汉大学水资源与水电工程科学国家重点实验室,湖北省海绵城市建设水系统科学重点实验室,湖北 武汉
关键词: 蒸发广义互补理论水循环变化趋势Evaporation Generalized Complementary Principle Water Cycle Change Trend
摘要: 准确估算区域蒸发是水文与水资源领域的重大挑战之一。评估了广义蒸发互补关系在中国区域的适用性,基于中国区域高时空分辨率地面气象要素数据集,估算了中国过去37年(1979~2015年)时空分辨率分别为日和0.1˚的蒸发量。研究结果表明,在全球建立的广义蒸发互补关系在中国区域通量站点模拟效果良好:9个站点观测值与实测值线性拟合R2在的均值为0.62 (0.39~0.83),RMSE均值为1.04 (0.69~1.62) mm d−1。由此估算的中国多年平均年蒸发量为486.24 mm,其空间分布特征及其大小与其他6种独立估算的蒸发产品和其他人在不同区域的研究结果一致。广义互补关系估算的蒸发结果显示在1979~2015年间中国蒸发量呈增加趋势,增加速率为1.33 mm a−1。本文提供了一种中国区域蒸发估算方法和数据,可为区域水循环研究和水资源管理提供支撑。
Abstract: Estimation of regional evaporation is one of the major challenges in hydrology and water resources management. In this paper, the applicability of the latest generalized complementary principle (GCR) is tested in China. Based on the China Meteorological Forcing Dataset (CMFD), long-term land surface daily actual evaporation in the past 37 years (1979~2015) is estimated using the GCR with a spatial resolution of 0.1˚. Results show that the latest GCR established at the global scale performs well in China. The mean R2 and root-mean-square error (RMSE) between the observed and estimated evaporation are 0.62 (0.39~0.83) and 1.04 (0.69~1.62) mm d−1 at 9-flux stations, respectively. The 37-year mean annual eva-poration of China estimated by GCR is 486.24 mm. Both spatial distribution and magnitude of estimated evaporation are well consistent with the other six independent evaporation products. Estimated evapora-tion indicates that land surface evaporation has increased significantly during the period of 1979~2015 with a rate of 1.33 mm a−1. This study provides a method and data set for regional evaporation in China, which can support regional water cycle research and water resource management.
文章引用:李曲, 程磊, 叶林媛, 刘攀, 熊立华. 基于广义蒸发互补关系的中国长期陆面蒸发量及其变化分析[J]. 水资源研究, 2020, 9(3): 259-269. https://doi.org/10.12677/JWRR.2020.93027

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