The estimation of distribution in field scale of surface aerodynamic roughness using remote sensing data
文献类型：会议论文
| 作者 | Zhang R. H. ; Zhu C. Y. ; Sun X. M. ; Zhu Z. L. ; Ieee |
| 出版日期 | 2004 |
| 关键词 | geometric roughness aerodynamic surface roughness roughness transformation model |
| 页码 | 4666-4669 |
| 英文摘要 | This paper presents a new way to calculate the aerodynamic roughness using the surface geometric roughness retrieved from SAR (Synthetic Aperture Radar) and TM thermal infrared image data. On the one hand, the SPM( Small Perturbation Model) was used as a theoretical SAR backscattering model to describe the relationship between the SAR backscattering coefficient and the surface geometric roughness and its dielectric constant retrieved from the physical model between the soil thermal inertia and the soil moisture with the simultaneous TM thermal infrared image data and the around microclimate data. On the basis of the SAR image matching with the TM image, the non-volume scattering surface geometric information was obtained from the SPM model at the TM image pixel scale, and the ground pixel surface's equivalent geometric roughness - height standard RMS (Root Mean Square) was achieved from the geometric information by the transformation of the typical topographic factors. The vegetation (wheat, tree) height retrieved from spectrum model was also transferred into its equivalent geometric roughness. A complete two-dimensional distribution map of the equivalent geometric roughness over the experimental area was produced by the data mosaic technique. On the other hand, according to the atmosphere eddy currents theory, the aerodynamic surface roughness was iterated out with the atmosphere stability correction method using the wind and the temperature profiles data measured at several typical fields such as bare soil field and vegetation field. After having analyzed the effect of surface equivalent geometric roughness together with dynamic and thermodynamic factors on the aerodynamic surface roughness within the working area, The final result retrieved from above series of models was validated by the in-situ measured data. |
| 收录类别 | CPCI |
| 会议录出版者 | Ieee |
| 语种 | 英语 |
| ISBN号 | 0-7803-8742-2 |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/25397]  |
| 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 | Zhang R. H.,Zhu C. Y.,Sun X. M.,et al. The estimation of distribution in field scale of surface aerodynamic roughness using remote sensing data[C]. 见:. |
入库方式： OAI收割
来源：地理科学与资源研究所
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