Implementation of Wilheit Model for Predicting L-Band Microwave Emission in the Third Pole Environment
文献类型：期刊论文
| 作者 | Wu, Xiaojing |
| 刊名 | IEEE GEOSCIENCE AND REMOTE SENSING LETTERS
 |
| 出版日期 | 2021-04-29 |
| 页码 | 5 |
| 关键词 | Soil measurements Mathematical model Soil moisture Microwave radiometry L-band Surface roughness Rough surfaces Frozen and thawed soils L-band radiometry multilayer soil emission model sampling depth Tibetan plateau |
| ISSN号 | 1545-598X |
| DOI | 10.1109/LGRS.2021.3074400 |
| 通讯作者 | Wu, Xiaojing(wuxj@igsnrr.ac.cn) |
| 英文摘要 | This letter investigates the performance of Wilheit model implemented with the tau -omega emission model for its ability to reproduce diurnal variations of brightness temperature (TBp) measurements for both frozen and thawed soil conditions. The needed soil permittivity is estimated by the four-phase dielectric mixing model. A data set of concurrent TBp and soil moisture and soil temperature (SMST) measurements performed in a Tibetan meadow ecosystem is used for the analysis. The Wilheit model is found to capture well the ELBARA-III measured TBp that results in low biases (absolute values <7.5 K) and high correlations (R-2 >= 0.77) for both frozen and thawed soil conditions. The soil moisture sampling depth (delta SM, i.e., soil moisture retrieval depth) is determined at 2.5 cm for the L-band radiometry, and consideration of deeper soil layers up to 100 cm contributes to less than 1.5% (+/- 3 K) and 5% (-12 K) of the radiometry measured signatures for the frozen and thawed soil conditions, respectively. It is found that the performance of Fresnel model is comparable to that of Wilheit model when the soil moisture measured at the delta SM is implemented. These findings are crucial for improving the L-band microwave emission modeling. |
| WOS关键词 | SOIL-MOISTURE RETRIEVAL ; PARAMETERIZATION ; TEMPERATURE ; FREEZE/THAW ; DYNAMICS ; SMOS |
| 资助项目 | Second Tibetan Plateau Scientific Expedition and Research Program (STEP)[2019QZKK0608] ; National Natural Science Foundation of China[41901317] |
| WOS研究方向 | Geochemistry & Geophysics ; Engineering ; Remote Sensing ; Imaging Science & Photographic Technology |
| 语种 | 英语 |
| WOS记录号 | WOS:000732071800001 |
| 出版者 | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC |
| 资助机构 | Second Tibetan Plateau Scientific Expedition and Research Program (STEP) ; National Natural Science Foundation of China |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/168798]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Wu, Xiaojing |
| 作者单位 | Chinese Acad Sci, Synth Res Ctr Chinese Ecosyst Res Network, Inst Geog Sci & Nat Resources Res, Key Lab Ecosyst Network Observat & Modeling, Beijing 100101, Peoples R China |
| 推荐引用方式 GB/T 7714 | Wu, Xiaojing. Implementation of Wilheit Model for Predicting L-Band Microwave Emission in the Third Pole Environment[J]. IEEE GEOSCIENCE AND REMOTE SENSING LETTERS,2021:5. |
| APA | Wu, Xiaojing.(2021).Implementation of Wilheit Model for Predicting L-Band Microwave Emission in the Third Pole Environment.IEEE GEOSCIENCE AND REMOTE SENSING LETTERS,5. |
| MLA | Wu, Xiaojing."Implementation of Wilheit Model for Predicting L-Band Microwave Emission in the Third Pole Environment".IEEE GEOSCIENCE AND REMOTE SENSING LETTERS (2021):5. |
入库方式： OAI收割
来源：地理科学与资源研究所
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