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Coupled Snow and Frozen Ground Physics Improves Cold Region Hydrological Simulations: An Evaluation at the upper Yangtze River Basin (Tibetan Plateau)
Qi, J (Qi, Jia)1,2; Wang, L (Wang, Lei)1,2,3; Zhou, J (Zhou, Jing)1; Song, L (Song, Lei)1,2; Li, XP (Li, Xiuping)1; Zeng, T (Zeng, Tian)1
Source PublicationJOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES
2019
Volume124Issue:23Pages:12985-13004
DOI10.1029/2019JD031622
Abstract

Cryosphere plays an important role in cold-region (e.g., Tibetan Plateau) hydrological processes under climate change, and thus cryosphere physics should be carefully represented in the hydrological modeling. In this study, based on the Water and Energy Budget-based Distributed Hydrological Model (WEB-DHM), we have further improved the cold-region hydrological processes, by incorporating the enthalpy-based coupled snow and frozen ground physics (hereinafter WEB-DHM-SF), and comprehensively evaluated at the upper Yangtze River Basin under widespread snow cover and frozen ground. The model was calibrated and validated at the basin scale using observed discharge at Zhimenda station during 1981-2016 and simulated discharge with high accuracies. The model also successfully reproduced the basin-wide daytime and nighttime land surface temperature (LST) as well as snow depth in basin-averaged time series and spatial distributions. At the point scale, the model successfully reproduced soil moisture and temperature profiles at Tuotuohe based on available yearlong observations. Furthermore, experiments were designed to investigate model improvements and indicated that the incorporation of the three-layer snow scheme with correct consideration of incident solar radiation attenuation among snow layers resulted in lowered snow melting and reduced discharges. Additionally, the incorporation of frozen ground physics with a correct description of soil water phase changes rendered the modeled soil moistures and temperatures more accurate in the cold season. Through rigorous evaluations of model performance, the incorporation of coupled snow and frozen ground physics demonstrates significant promise for improving cryosphere hydrological simulations in river basins on the TP.

Subject AreaAtmospheric Sciences
WOS IDWOS:000505626200036
Language英语
Indexed BySCI
KeywordSurface Parameterization Sib2 Climate-change Soil Parameterization Atmospheric Gcms Thermal Regime Model Runoff Cover Water Temperature
WOS Research AreaMeteorology & Atmospheric Sciences
WOS SubjectMeteorology & Atmospheric Sciences
Cooperation Status国内
ISSN2169-897X
Department环境变化与地表过程重点实验室
URL查看原文
PublisherAMER GEOPHYSICAL UNION
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.itpcas.ac.cn/handle/131C11/9047
Collection中国科学院青藏高原研究所
Corresponding AuthorWang, L (Wang, Lei)
Affiliation1.Chinese Acad Sci, Inst Tibetan Plateau Res, Key Lab Tibetan Environm Changes & Land Surface P, Beijing, Peoples R China;
2.Univ Chinese Acad Sci, Beijing, Peoples R China;
3.CAS Ctr Excellence Tibetan Plateau Earth Sci, Beijing, Peoples R China
Recommended Citation
GB/T 7714
Qi, J ,Wang, L ,Zhou, J ,et al. Coupled Snow and Frozen Ground Physics Improves Cold Region Hydrological Simulations: An Evaluation at the upper Yangtze River Basin (Tibetan Plateau)[J]. JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,2019,124(23):12985-13004.
APA Qi, J ,Wang, L ,Zhou, J ,Song, L ,Li, XP ,&Zeng, T .(2019).Coupled Snow and Frozen Ground Physics Improves Cold Region Hydrological Simulations: An Evaluation at the upper Yangtze River Basin (Tibetan Plateau).JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES,124(23),12985-13004.
MLA Qi, J ,et al."Coupled Snow and Frozen Ground Physics Improves Cold Region Hydrological Simulations: An Evaluation at the upper Yangtze River Basin (Tibetan Plateau)".JOURNAL OF GEOPHYSICAL RESEARCH-ATMOSPHERES 124.23(2019):12985-13004.
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