气候变化领域集成服务门户(CCPortal): Improving the hydrology of the Simple Biosphere Model 2 and its evaluation within the framework of a distributed hydrological model

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DOI	10.1623/hysj.54.6.989
	Improving the hydrology of the Simple Biosphere Model 2 and its evaluation within the framework of a distributed hydrological model
	Wang, Lei; Koike, Toshio; Yang, Dawen; Yang, Kun
通讯作者	Wang, L (通讯作者)
发表日期	2009
ISSN	0262-6667
起始页码	989
结束页码	1006
卷号	54 期号:6
英文摘要	The hydrological description of the Simple Biosphere Model 2 (SiB2) is improved in three respects. First, the SiB2 three-layer soil model is replaced with a multi-layer soil column coupled to a lumped unconfined aquifer model. Next, lateral water flows are described in the updated soil model. Finally, the soil hydraulic function in SiB2 is replaced with van Genuchten parameterization, and exponential vertical soil heterogeneity is described. In using observed streamflow to evaluate the hydrologically improved SiB2 (HydroSiB2), a new hydrological model (HydroSiB2-DHM) was developed by embedding HydroSiB2 into the spatial framework of a distributed hydrological model. Three-year fine temporal scale meteorological data from a small river basin were used to drive both HydroSiB2-DHM and SiB2-DHM (the same as HydroSiB2-DHM but with the original SiB2). Sub-grid topography was considered in both model runs, and analyses were based on basin-averaged values to maintain consistency with the regional evaluation using streamflow. The results show that HydroSiB2-DHM performs well in both fine and coarse time-scale runoff simulations; while SiB2-DHM captures inter-annual and seasonal runoff changes, but gives poor results in simulations at finer temporal-scales (daily and hourly). Owing to the treatment of lateral flows and using a multi-layer soil model coupled with a lumped unconfined aquifer in HydroSiB2, the soil moisture budget is qualitatively improved. In recession periods, the basin-averaged bare soil evaporation reduced by about 0.1 mm/d, resulting in a decrease in the latent heat flux and an increase in sensible heat flux of about 3.9 and 3.2 W/m(2), respectively.
关键词	SURFACE PARAMETERIZATION SIB2 HYDRAULIC CONDUCTIVITY ATMOSPHERIC GCMS BOUNDARY-LAYER RIVER-BASIN PART I PROJECT SIMULATIONS CIRCULATION GENERATION
英文关键词	SiB2; HydroSiB2; distributed hydrological model; streamflow; soil wetness; evapotranspiration; sensible heat flux; lateral flows
语种	英语
WOS研究方向	Water Resources
WOS类目	Water Resources
WOS记录号	WOS:000272747500001
来源期刊	HYDROLOGICAL SCIENCES JOURNAL-JOURNAL DES SCIENCES HYDROLOGIQUES
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/257681
推荐引用方式 GB/T 7714	Wang, Lei,Koike, Toshio,Yang, Dawen,et al. Improving the hydrology of the Simple Biosphere Model 2 and its evaluation within the framework of a distributed hydrological model[J]. 中国科学院青藏高原研究所,2009,54(6).
APA	Wang, Lei,Koike, Toshio,Yang, Dawen,&Yang, Kun.(2009).Improving the hydrology of the Simple Biosphere Model 2 and its evaluation within the framework of a distributed hydrological model.HYDROLOGICAL SCIENCES JOURNAL-JOURNAL DES SCIENCES HYDROLOGIQUES,54(6).
MLA	Wang, Lei,et al."Improving the hydrology of the Simple Biosphere Model 2 and its evaluation within the framework of a distributed hydrological model".HYDROLOGICAL SCIENCES JOURNAL-JOURNAL DES SCIENCES HYDROLOGIQUES 54.6(2009).