A New Evapotranspiration Model Accounting for Advection and Its Validation during SMEX02
文献类型：SCI/SSCI论文
| 作者 | Yang Y. M. ; Su H. B. ; Zhang R. H. ; Wu J. J. ; Qi J. W. |
| 发表日期 | 2013 |
| 关键词 | surface-energy balance broad-band conversions heat-flux regional evapotranspiration evaporative fraction potential evaporation canopy temperature semiarid climate closure problem triangle method |
| 英文摘要 | Based on the crop water stress index (CWSI) concept, a new model was proposed to account for advection to estimate evapotranspiration. Both local scale evaluation with sites observations and regional scale evaluation with a remote dataset from Landsat 7 ETM+ were carried out to assess the performance of this model. Local scale evaluation indicates that this newly developed model can effectively characterize the daily variations of evapotranspiration and the predicted results show good agreement with the site observations. For all the 6 corn sites, the coefficient of determination (R-2) is 0.90 and the root mean square difference (RMSD) is 58.52W/m(2). For all the 6 soybean sites, the R-2 and RMSD are 0.85 and 49.46W/m(2), respectively. Regional scale evaluation shows that the model can capture the spatial variations of evapotranspiration at the Landsat-based scale. Clear spatial patterns were observed at the Landsat-based scale and are closely related to the dominant land covers, corn and soybean. Furthermore, the surface resistance derived from instantaneous CWSI was applied to the Penman-Monteith equation to estimate daily evapotranspiration. Overall, results indicate that this newly developed model is capable of estimating reliable surface heat fluxes using remotely sensed data. |
| 出处 | Advances in Meteorology |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1687-9309 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/30100]  |
| 专题 | 地理科学与资源研究所_历年回溯文献 |
| 推荐引用方式 GB/T 7714 | Yang Y. M.,Su H. B.,Zhang R. H.,et al. A New Evapotranspiration Model Accounting for Advection and Its Validation during SMEX02. 2013. |
入库方式： OAI收割
来源：地理科学与资源研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。