Coupling SEBAL with a new radiation module and MODIS products for better estimation of evapotranspiration

	Coupling SEBAL with a new radiation module and MODIS products for better estimation of evapotranspiration
	Zheng, Chaolei 1; Wang, Quan 1; Li, Pingheng 1
刊名	Hydrological Sciences Journal
	2016
卷号	61 期号:8 页码:1535-1547
关键词	HEMORRHAGIC-FEVER CANCER MORTALITY SPATIAL-ANALYSIS VIRUS TRANSMISSION CLIMATE CHINA RISK PATTERNS VECTORS
通讯作者	Wang, Quan (aqwang@ipc.shizuoka.ac.jp)
英文摘要	Evapotranspiration (ET) is an important ecohydrological process especially in arid and semi-arid regions. In this study, a new radiation module based on MODIS data has been coupled with the Surface Energy Balance Algorithms for Land (SEBAL) to better estimate ET. The accuracies of the coupled model for estimating available energy and sensible heat (H) were improved significantly compared with the outputs from the original SEBAL which was based on empirical equations. The coupled SEBAL modelled instantaneous λET agreed much better with observations in the arid land of Central Asia than the original SEBAL, with a bias of −2.86 W m-2, root mean square error (RMSE) of 9.75 W m-2, and normalized RMSE (NRMSE) of 0.13. The accuracy was blurred when scaling ET to a daily or monthly scale, mainly due to the uncertainties associated with temporal upscaling methods that were applied. Sensitivity analysis, which was conducted using numerical variance-based techniques, indicated that the estimated ET is sensitive to the available energy, suggesting the importance of obtaining accurate estimates of net radiation when applying the coupled SEBAL to estimate ET. This study provides a simple and reliable way to utilize MODIS products and contains sensitivity analysis for helping to correctly interpret the outputs, which are both important for large-scale ET estimation. © 2016 IAHS.
学科主题	Water Resources
类目[WOS]	Water Resources
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:20162002398125
内容类型	期刊论文
源URL	[http://ir.radi.ac.cn/handle/183411/39452]
专题	遥感与数字地球研究所_SCI/EI期刊论文_期刊论文
作者单位	1. CAS, Xinjiang Institute of Ecology and Geography, Urumqi, China 2. State Key Laboratory of Remote Sensing Science, Institute of Remote Sensing and Digital Earth, Chinese Academy of Sciences, Beijing, China 3. Graduate School of Agriculture, Shizuoka University, Shizuoka, Japan
推荐引用方式 GB/T 7714	Zheng, Chaolei,Wang, Quan,Li, Pingheng. Coupling SEBAL with a new radiation module and MODIS products for better estimation of evapotranspiration[J]. Hydrological Sciences Journal,2016,61(8):1535-1547.
APA	Zheng, Chaolei,Wang, Quan,&Li, Pingheng.(2016).Coupling SEBAL with a new radiation module and MODIS products for better estimation of evapotranspiration.Hydrological Sciences Journal,61(8),1535-1547.
MLA	Zheng, Chaolei,et al."Coupling SEBAL with a new radiation module and MODIS products for better estimation of evapotranspiration".Hydrological Sciences Journal 61.8(2016):1535-1547.