基于多数据集的亚洲高山雪水当量对陆地储水量变化的贡献

IF 4.7 2区地球科学 Q1 WATER RESOURCES

Journal of Hydrology-Regional Studies Pub Date : 2025-04-17 DOI:10.1016/j.ejrh.2025.102401

Qian Li , Weili Duan , Tao Yang , Yuting Fan , Lanhai Li

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引用次数: 0

摘要

研究区域：亚洲高山地区。研究重点雪水当量（SWE）储量是亚洲高山地区陆地水储量（TWS）的重要组成部分。本研究利用全球陆地资料同化系统（GLDAS） NOAH、GLDAS集水区陆面模式（CLSM）、欧洲中期天气预报中心第5版再分析陆面（ERA5L）、高亚洲精细分析（HAR）和中国气象局全球陆面再分析中期（CRA） 2003-2020年逐月资料对TWS异常（TWSA）进行了比较。此外，估计了SWE对TWS变化的贡献。结果表明，TWSA在多个数据集上具有较大的变异性，而SWE异常（SWEA）时间序列表现出更一致的波动。多个数据集的年SWE占TWSA的百分比在7.40 ~ 26.95 %之间，表明SWE动态在研究区具有相对重要的作用。在HMA中发现了三种主要的贡献类型，即当TWSA和SWEA同时降低或同时增加时，为正贡献；当SWEA增加而TWSA降低时，为负贡献。SWEA在控制TWSA总量中的个体作用表现出较大的区域和季节异质性。该研究结果为下游大量人口的水资源管理和可利用性提供了重要参考。

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Contribution of snow water equivalent to the terrestrial water storage changes in High Mountain Asia based on multiple datasets

Study region

High Mountain Asia.

Study focus

Snow water equivalent (SWE) storage is a crucial component of the terrestrial water storage (TWS) in High Mountain Asia (HMA). This study employed monthly data from the Global Land Data Assimilation System (GLDAS) NOAH, GLDAS catchment land surface model (CLSM), European Centre for Medium Range Weather Forecasts reanalysis version 5 land (ERA5L), High Asia refined analysis (HAR), and the China Meteorological Administration’s global Land surface reanalysis Interim (CRA) during 2003–2020 to compare the TWS anomaly (TWSA). Additionally, the contribution of SWE to the TWS changes was estimated.

New hydrological insights for the region

The results reveal that the TWSA had a large variability for the multiple datasets while the SWE anomaly (SWEA) time series exhibited more consistent fluctuations. The annual percentage of the SWEA to the TWSA ranged between 7.40–26.95 % for the multiple datasets, indicating the relatively important role of the SWE dynamics in the study area. Three main types of contributions were found in HMA, i.e., positive contributions when the TWSA and SWEA both decreased or both increased, and a negative contribution when the SWEA increased and the TWSA decreased. The individual role of the SWEA in controlling the total TWSA showed large regional and seasonal heterogeneity. The results of this study provide an essential reference for water management and availability to large downstream population.

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来源期刊

Journal of Hydrology-Regional Studies Earth and Planetary Sciences-Earth and Planetary Sciences (miscellaneous)

CiteScore

6.70

自引率

8.50%

发文量

284

审稿时长

60 days

期刊介绍： Journal of Hydrology: Regional Studies publishes original research papers enhancing the science of hydrology and aiming at region-specific problems, past and future conditions, analysis, review and solutions. The journal particularly welcomes research papers that deliver new insights into region-specific hydrological processes and responses to changing conditions, as well as contributions that incorporate interdisciplinarity and translational science.