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Characterizing prec...
Characterizing precipitation uncertainties in a high-altitudinal permafrost watershed of the Tibetan plateau based on regional water balance and hydrological model simulations
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Jiang, H. R. (författare)
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Yi, Y. H. (författare)
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Xu, J. J. (författare)
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- Chen, Deliang, 1961 (författare)
- Gothenburg University,Göteborgs universitet,Institutionen för geovetenskaper,Department of Earth Sciences
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Lu, F. (författare)
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Li, R. X. (författare)
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Wang, X. J. (författare)
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Zhou, B. R. (författare)
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(creator_code:org_t)
- 2023
- 2023
- Engelska.
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Ingår i: Journal of Hydrology Regional Studies. - 2214-5818. ; 47
- Relaterad länk:
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https://gup.ub.gu.se...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Study region: the source region of the Yangtze River (SRYR) Study focus: Precipitation uncertainties significantly impact water resource management, while the uncertainties of various precipitation products are not fully investigated due to the lack of observations, especially in high-altitudinal permafrost areas. In this study, we selected nine products representing three types of precipitation, including gauge-based, satellite-based and merged products, and conducted a comprehensive evaluation using regional water balance method and hydrological model simulations. New hydrological insights for the region: Our results indicate most precipitation products can replicate the observed precipitation decreasing trend with increasing elevation below 4500 m, but trends vary at higher elevations. The gauge-based precipitation products with bias correction outperform others, while most satellite-based products underestimate precipitation. The water -balance based evaluation shows a merged product (TPHiPr), and two gauge-based products perform best, followed by a satellite-based product (MSWEP). Process-based model simulations driven by selected precipitation products can reproduce daily runoff processes well in the entire SRYR (NSE = 0.68-0.86), but the performance degraded in the high-altitudinal Tuotuohe sub -basin (NSE = 0.08-0.76). The runoff coefficients comparisons in these two regions also indicate the possible deficiencies of precipitation products in the high-altitudinal regions. Our results highlight the challenges of current precipitation products in characterizing the spatial and tem-poral precipitation changes in the high-altitudinal permafrost regions, and call for more accurate products in these areas.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)
Nyckelord
- Precipitation uncertainty
- Tibetan Plateau
- Permafrost
- Runoff
- simulation
- Source Region of Yangtze River
Publikations- och innehållstyp
- ref (ämneskategori)
- art (ämneskategori)
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