| A weak-constraint-based data assimilation scheme for estimating surface turbulent fluxes | |
| Qin J. ; Liang S. L. ; Liu R. G. ; Zhang H. ; Hu B. | |
| 2007 | |
| 关键词 | data assimilation evapotranspiration land surface temperature (LST) weak constraint energy balance components evaporative fraction parameter-estimation heat fluxes temperature strategies inverse daytime system model |
| 英文摘要 | Much attention has been focused on the assimilation of satellite data and products into land surface processes. In this letter, a variational data assimilation scheme is developed based on the weak-constraint concept. It assimilates surface skin temperature into a simple land surface model for the estimation of turbulent fluxes. An automatic differentiation technique is used to derive the adjoint codes to evaluate the gradient of the cost function. After the construction of this assimilation system, numerical experiments are conducted to test its performance with different model errors, and the comparison is also made with the strong constraint scheme. The results show that the land surface turbulent fluxes can be retrieved with highly satisfactory accuracy. |
| 出处 | Ieee Geoscience and Remote Sensing Letters |
| 卷 | 4 |
| 期 | 4 |
| 页 | 649-653 |
| 收录类别 | SCI |
| 语种 | 英语 |
| ISSN号 | 1545-598X |
| 内容类型 | SCI/SSCI论文 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/23176]  |
| 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 | Qin J.,Liang S. L.,Liu R. G.,et al. A weak-constraint-based data assimilation scheme for estimating surface turbulent fluxes. 2007. |
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