Divergent sensitivity of surface water and energy variables to precipitation product uncertainty in the Tibetan Plateau

Qi，Wei1; Liu，Junguo1; Xia，Jun2; Chen，Deliang3

2020-02-01

10.1016/j.jhydrol.2019.124338

JOURNAL OF HYDROLOGY   影响因子和分区

0022-1694

1879-2707

Precipitation is a major driving factor for land surface water and energy balances. Uncertainty in global precipitation products over observation sparse regions such as the Tibetan Plateau (TP) is generally large. Sensitivity of surface water and energy variables to precipitation uncertainty can provide clues for confidence that can be assigned to simulated water and energy variables in such regions. In this study, the sensitivities of surface water and energy variables to global precipitation product uncertainty over four large river basins in the TP are quantified and inter-compared based on a newly developed sensitivity analysis approach. A water and energy budget-based distributed hydrological model including biosphere is utilized after calibration and validation against observed runoff and Land Surface Temperatures (LSTs) from Moderate Resolution Imaging Spectroradiometer (MODIS). Eight global precipitation products are used to represent the precipitation uncertainty. Results show that Canopy interception loss (CIE) and runoff are highly sensitive to the uncertainty in general, whereas LSTs are not sensitive. Therefore, confidence in simulated CIE and runoff can be considered relatively low when using global precipitation products in the four basins. These results imply that other simulated variables may have large uncertainty even when LSTs simulation performs well, and accurate simulations of CIE and runoff require high accuracy in precipitation. Because CIE has profound influence on local hydrological cycle, the results also imply that utilizing the most accurate precipitation product is critical for local scale hydrological cycle research.

Distributed hydrological modeling Precipitation uncertainty Runoff Sensitivity Tibetan Plateau Water Balance

EI ; SCI

英语

第一 ; 通讯

Young Scientists Fund[] ; China Postdoctoral Science Foundation[2017M622516] ; National Natural Science Foundation of China[51809136] ; China Academy of Chinese Medical Sciences[XDA20060402] ; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology[2017B030301012] ; State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex[]

Engineering ; Geology ; Water Resources

Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources

WOS:000514758300002

Elsevier B.V.

20194807758349

Budget control ; Hydrology ; Land surface temperature ; Precipitation (meteorology) ; Radiometers ; Runoff ; Sensitivity analysis ; Surface measurement

Flood Control:442.1 ; Precipitation:443.3 ; Mathematics:921 ; Probability Theory:922.1 ; Mechanical Variables Measurements:943.2 ; Radiation Measuring Instruments:944.7

ENGINEERING

2-s2.0-85075587105

Scopus

1.School of Environmental Science and Engineering,Southern University of Science and Technology,Shenzhen,518055,China
2.State Key Laboratory of Water Resources & Hydropower Engineering Science,Wuhan University,Wuhan,430072,China
3.Regional Climate Group,Department of Earth Sciences,University of Gothenburg,Gothenburg,Box 460,S-405 30,Sweden

Qi，Wei,Liu，Junguo,Xia，Jun,et al. Divergent sensitivity of surface water and energy variables to precipitation product uncertainty in the Tibetan Plateau[J]. JOURNAL OF HYDROLOGY,2020,581.

Qi，Wei,Liu，Junguo,Xia，Jun,&Chen，Deliang.(2020).Divergent sensitivity of surface water and energy variables to precipitation product uncertainty in the Tibetan Plateau.JOURNAL OF HYDROLOGY,581.

Qi，Wei,et al."Divergent sensitivity of surface water and energy variables to precipitation product uncertainty in the Tibetan Plateau".JOURNAL OF HYDROLOGY 581(2020).