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DOI	10.5194/hess-23-4983-2019
	A global Budyko model to partition evaporation into interception and transpiration
	Mianabadi A.; Coenders-Gerrits M.; Shirazi P.; Ghahraman B.; Alizadeh A.
发表日期	2019
ISSN	1027-5606
起始页码	4983
结束页码	5000
卷号	23 期号:12
英文摘要	Evaporation is a crucial flux in the hydrological cycle and links the water and energy balance of a catchment. The Budyko framework is often used to provide a first-order estimate of evaporation, as it is a straightforward model with only rainfall and potential evaporation as required input. Many researchers have improved the Budyko framework by including more physics and catchment characteristics in the original equation. However, the parameterization of these improved Budyko models is not so straightforward, is data demanding, and requires local knowledge that is difficult to obtain at the global scale. In this paper we present an improvement of the previously presented Gerrits' model ("Analytical derivation of the Budyko curve based on rainfall characteristics and a simple evaporation model" in Gerrits et al., 2009 WRR), whereby total evaporation is calculated on the basis of simple interception and transpiration thresholds in combination with measurable parameters like rainfall dynamics and storage availability from remotely sensed data sources. While Gerrits' model was previously investigated for 10 catchments with different climate conditions and where some parameters were assumed to be constant, in this study we applied the model at the global scale and fed the model with remotely sensed input data. The output of the model has been compared to two complex land-surface models, STEAM and GLEAM, as well as the database of Landflux-EVAL. Our results show that total evaporation estimated by Gerrits' model is in good agreement with Landflux-EVAL, STEAM, and GLEAM. The results also show that Gerrits' model underestimates interception in comparison to STEAM and overestimates it in comparison to GLEAM, whereas the opposite is found for transpiration. Errors in interception can partly be explained by differences in the definition of interception that successively introduce errors in the calculation of transpiration. Relating to the Budyko framework, the model shows a reasonable performance for the estimation of total evaporation. The results also found a unimodal distribution of the transpiration to precipitation fraction (Et/p), indicating that both increasing and decreasing aridity will result in a decline in the fraction of transpired rainfall by plants for growth and metabolism. © 2019 Author(s).
语种	英语
scopus关键词	Catchments; Climate models; Digital storage; Rain; Remote sensing; Runoff; Catchment characteristics; Hydrological cycles; Land surface models; Measurable parameters; Potential evaporation; Rainfall characteristics; Remotely sensed data; Unimodal distribution; Transpiration; aridity; catchment; climate conditions; energy balance; evapotranspiration; hydrological cycle; interception; rainfall
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/159549
作者单位	Mianabadi, A., Water Engineering Department, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran, Water Resources Section, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, Netherlands; Coenders-Gerrits, M., Water Resources Section, Faculty of Civil Engineering and Geosciences, Delft University of Technology, Delft, Netherlands; Shirazi, P., Water Engineering Department, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran; Ghahraman, B., Water Engineering Department, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran; Alizadeh, A., Water Engineering Department, Faculty of Agriculture, Ferdowsi University of Mashhad, Mashhad, Iran
推荐引用方式 GB/T 7714	Mianabadi A.,Coenders-Gerrits M.,Shirazi P.,et al. A global Budyko model to partition evaporation into interception and transpiration[J],2019,23(12).
APA	Mianabadi A.,Coenders-Gerrits M.,Shirazi P.,Ghahraman B.,&Alizadeh A..(2019).A global Budyko model to partition evaporation into interception and transpiration.Hydrology and Earth System Sciences,23(12).
MLA	Mianabadi A.,et al."A global Budyko model to partition evaporation into interception and transpiration".Hydrology and Earth System Sciences 23.12(2019).