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| DOI | 10.1016/j.jhydrol.2018.06.024 |
| Impact of soil freeze-thaw mechanism on the runoff dynamics of two Tibetan rivers | |
| Zheng, Donghai; van der Velde, Rogier; Su, Zhongbo; Wen, Jun; Wang, Xin; Yang, Kun | |
| 通讯作者 | Zheng, DH (通讯作者) |
| 发表日期 | 2018 |
| ISSN | 0022-1694 |
| EISSN | 1879-2707 |
| 起始页码 | 382 |
| 结束页码 | 394 |
| 卷号 | 563 |
| 英文摘要 | Soil freeze-thaw is typically not fully considered in quantifying the hydrology of seasonally frozen catchments located, for instance, on the Third Pole. We investigate the role of soil water content and freeze-thaw state on the runoff dynamics of the headwaters of the Yellow and Yangtze rivers, both situated on the eastern Tibetan Plateau. A version of augmented Noah land surface model (LSM) allowing reliable simulation of key hydro meteorological processes over the Tibetan Plateau is employed and further validated using measured monthly discharge records. From measurements supported by the Noah LSM simulations for more than thirty years (1979-2010), we deduce an annual hysteresis loop, viz. a time lag between measured/simulated runoff and precipitation for both catchments. Our simulation results with the augmented Noah LSM further demonstrate that annual anticlockwise (or clockwise) hysteresis loops are also observed for the liquid soil water (or soil ice). We infer from the LSM simulations that the amount of water stored in the soil is the factor driving the hysteresis between runoff and precipitation, whereby the state of the stored water plays a crucial role in the seasonality of the runoff regime. Further analyses illustrate that inclusion of soil freeze-thaw model physics effectively increases the thermal inertia of the soil column that dampens large variations of soil temperature and turbulent heat fluxes. These findings highlight the importance of soil freeze-thaw for the hydrology and runoff regime across the High Asia's rivers as well as the need for a thorough understanding of this process to generate reliable projections. |
| 关键词 | LAND-SURFACE MODELDATA ASSIMILATION SYSTEMHYDROLOGICAL PROCESSESYELLOW-RIVERFROZEN SOILCLIMATE-CHANGEPLATEAUPERMAFROSTMOISTUREPARAMETERIZATION |
| 英文关键词 | Frozen soil; Runoff; Land surface modelling; Tibetan Plateau |
| 语种 | 英语 |
| WOS研究方向 | Engineering ; Geology ; Water Resources |
| WOS类目 | Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources |
| WOS记录号 | WOS:000441492700031 |
| 来源期刊 | JOURNAL OF HYDROLOGY
 |
| 来源机构 | 中国科学院青藏高原研究所 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/259255 |
| 推荐引用方式 GB/T 7714 | Zheng, Donghai,van der Velde, Rogier,Su, Zhongbo,et al. Impact of soil freeze-thaw mechanism on the runoff dynamics of two Tibetan rivers[J]. 中国科学院青藏高原研究所,2018,563. |
| APA | Zheng, Donghai,van der Velde, Rogier,Su, Zhongbo,Wen, Jun,Wang, Xin,&Yang, Kun.(2018).Impact of soil freeze-thaw mechanism on the runoff dynamics of two Tibetan rivers.JOURNAL OF HYDROLOGY,563. |
| MLA | Zheng, Donghai,et al."Impact of soil freeze-thaw mechanism on the runoff dynamics of two Tibetan rivers".JOURNAL OF HYDROLOGY 563(2018). |
| 条目包含的文件 | 条目无相关文件。 | |||||
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