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DOI	10.5194/hess-23-1779-2019
	The benefits of spatial resolution increase in global simulations of the hydrological cycle evaluated for the Rhine and Mississippi basins
	Benedict I.; Van Heerwaarden C.C.; Weerts A.H.; Hazeleger W.
发表日期	2019
ISSN	1027-5606
起始页码	1779
结束页码	1800
卷号	23 期号:3
英文摘要	To study the global hydrological cycle and its response to a changing climate, we rely on global climate models (GCMs) and global hydrological models (GHMs). The spatial resolution of these models is restricted by computational resources and therefore limits the processes and level of detail that can be resolved. Increase in computer power therefore permits increase in resolution, but it is an open question where this resolution is invested best: in the GCM or GHM. In this study, we evaluated the benefits of increased resolution, without modifying the representation of physical processes in the models. By doing so, we can evaluate the benefits of resolution alone.We assess and compare the benefits of an increased resolution for a GCM and a GHM for two basins with long observational records: the Rhine and Mississippi basins. Increasing the resolution of a GCM (1.125 to 0.25°) results in an improved precipitation budget over the Rhine basin, attributed to a more realistic large-scale circulation. These improvements with increased resolution are not found for the Mississippi basin, possibly because precipitation is strongly dependent on the representation of still unresolved convective processes. Increasing the resolution of the GCM improved the simulations of the monthly-averaged discharge for the Rhine, but did not improve the representation of extreme streamflow events. For the Mississippi basin, no substantial differences in precipitation and discharge were found with the higher-resolution GCM and GHM. Increasing the resolution of parameters describing vegetation and orography in the high-resolution GHM (from 0.5 to 0.05°) shows no significant differences in discharge for both basins. A straightforward resolution increase in the GHM is thus most likely not the best method to improve discharge predictions, which emphasizes the need for better representation of processes and improved parameterizations that go hand in hand with resolution increase in a GHM. ©2019 Author(s).
语种	英语
scopus关键词	Budget control; Image resolution; Computational resources; Discharge predictions; Global climate model; Hydrological cycles; Hydrological models; Large-scale circulation; Resolution increase; Stream-flow events; Climate models; climate change; global change; global climate; hydrological cycle; hydrological modeling; orography; parameterization; precipitation (climatology); simulation; spatial resolution; streamflow; Mississippi Basin; Rhine Basin; United States
来源期刊	Hydrology and Earth System Sciences
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/159711
作者单位	Benedict, I., Meteorology and Air Quality Group, Wageningen University, Droevendaalsesteeg 4, Wageningen, BP 6708, Netherlands; Van Heerwaarden, C.C., Meteorology and Air Quality Group, Wageningen University, Droevendaalsesteeg 4, Wageningen, BP 6708, Netherlands; Weerts, A.H., Hydrology and Quantitative Water Management Group, Wageningen University, Droevendaalsesteeg 4, Wageningen, BP 6708, Netherlands, Deltares, P.O. Box 177, Delft, MH 2600, Netherlands; Hazeleger, W., Meteorology and Air Quality Group, Wageningen University, Droevendaalsesteeg 4, Wageningen, BP 6708, Netherlands, Netherlands EScience Center (NLeSC), Science Park 140, Amsterdam, XG 1098, Netherlands
推荐引用方式 GB/T 7714	Benedict I.,Van Heerwaarden C.C.,Weerts A.H.,et al. The benefits of spatial resolution increase in global simulations of the hydrological cycle evaluated for the Rhine and Mississippi basins[J],2019,23(3).
APA	Benedict I.,Van Heerwaarden C.C.,Weerts A.H.,&Hazeleger W..(2019).The benefits of spatial resolution increase in global simulations of the hydrological cycle evaluated for the Rhine and Mississippi basins.Hydrology and Earth System Sciences,23(3).
MLA	Benedict I.,et al."The benefits of spatial resolution increase in global simulations of the hydrological cycle evaluated for the Rhine and Mississippi basins".Hydrology and Earth System Sciences 23.3(2019).