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
复制标题
将 SEBAL 与新的辐射模块和 MODIS 产品耦合,以更好地估计蒸散量
DOI:
10.1080/02626667.2015.1031762
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发表时间:
2016-05
期刊:
影响因子:
--
通讯作者:
Li Pingheng
中科院分区:
文献类型:
--
作者:
Zheng Chaolei;Wang Quan;Li Pingheng
ABSTRACT 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.
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影响因子:
13.5
作者:
A. French;F. Jacob;Martha C. Anderson;W. Kustas;W. Timmermans;A. Gieske;Z. Su;H. Su;M. Mccabe-M.-M
通讯作者:
A. French;F. Jacob;Martha C. Anderson;W. Kustas;W. Timmermans;A. Gieske;Z. Su;H. Su;M. Mccabe-M.-M
影响因子:
2.5
作者:
Andrea Saltelli;S. Tarantola;K. Chan
通讯作者:
Andrea Saltelli;S. Tarantola;K. Chan
影响因子:
3.7
作者:
V. Kongo;G. Jewitt
通讯作者:
V. Kongo;G. Jewitt
影响因子:
2.6
作者:
Chaolei Zheng;Quan Wang
通讯作者:
Chaolei Zheng;Quan Wang
DOI:
--
发表时间:
2010
期刊:
--
影响因子:
--
作者:
Andrea Saltelli;P. Annoni
通讯作者:
Andrea Saltelli;P. Annoni