Dual-Polarimetric Sentinel-1 SAR Backscattering Features From Green Macroalgae Floating in the Coastal Ocean
文献类型：期刊论文
| 作者 | Guo, Yuan1,4; Nunziata, Ferdinando2; Buono, Andrea3; Migliaccio, Maurizio3; Li, Xiaofeng4 |
| 刊名 | IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING
 |
| 出版日期 | 2025 |
| 卷号 | 63页码:15 |
| 关键词 | Green macroalgae (GMAs) polarimetry scattering synthetic aperture radar (SAR) Green macroalgae (GMAs) polarimetry scattering synthetic aperture radar (SAR) |
| ISSN号 | 0196-2892 |
| DOI | 10.1109/TGRS.2025.3587819 |
| 通讯作者 | Li, Xiaofeng(xiaofeng.li@ieee.org) |
| 英文摘要 | Green macroalgae (GMAs) are prominently visible as distinctive bright mats on synthetic aperture radar (SAR) imagery, which are frequently used to complement conventional optical observations for extracting GMA distribution at sea. However, the mechanisms ruling the interaction between the microwaves and the GMA are not well understood. This study aims to address this gap by systematically analyzing C-band backscattering from GMA-covered sea surfaces from a physical perspective using dual-polarized Sentinel-1 SAR imagery combined with a three-layer description of the GMA-covered sea surface. First, the dual-polarized normalized radar cross section (NRCS) is analyzed showing that the co-polarized backscatter is always above the system noise, while this is not the case for the cross-polarized backscatter that is frequently noisy. Then, polarimetric descriptors are adopted to shed light on the GMA backscatter mechanisms. The degree of polarization (DoP) is evaluated to demonstrate that the electromagnetic (EM) wave backscattered from the GMA is almost fully polarized, indicating a negligible depolarized component. Finally, the polarization ellipse associated with the EM wave backscattered from the GMA is analyzed, showing that the GMAs call for a linearly polarized (almost vertically oriented) backscattered EM wave. This finding suggests a scattering mechanism dominated by single-reflection and residual multiple-reflection components within the wet-GMA layer of the three-layer schematic model. The analysis is extended to several imageries collected under different green tide stages, showing that the abovementioned findings always apply. |
| WOS关键词 | ULVA-PROLIFERA BLOOMS ; YELLOW SEA ; CHINA ; ALGAE ; TIDES ; VARIABILITY |
| 资助项目 | National Natural Science Foundation of China[42221005] ; National Natural Science Foundation of China[42076200] ; Qingdao Science and Technology for People's Livelihood Demonstration Special Project[25-1-5-cspz-18-nsh] ; National Science Foundation of China[42206202] ; European Space Agency within the framework of the Dragon 6 joint cooperation ; National Remote Sensing Center of China (EVERGREEN:MarinE added-ValuE p Roducts Generated by Remotely sEnsed microwav EmeasuremeNts)[95258] ; Italian Ministry of University and Research[2022C3X37E] ; China Scholarship Council |
| WOS研究方向 | Geochemistry & Geophysics ; Engineering ; Remote Sensing ; Imaging Science & Photographic Technology |
| 语种 | 英语 |
| WOS记录号 | WOS:001534542200015 |
| 出版者 | IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC |
| 源URL | [http://ir.qdio.ac.cn/handle/337002/202815]  |
| 专题 | 海洋研究所_海洋环流与波动重点实验室 |
| 通讯作者 | Li, Xiaofeng |
| 作者单位 | 1.Univ Chinese Acad Sci, Coll Marine Sci, Qingdao 266400, Peoples R China 2.Sapienza Univ Rome, Dept Informat Engn Elect & Telecommun DIET, I-00185 Rome, Italy 3.Parthenope Univ Naples, Dept Engn, I-80143 Naples, Italy 4.Chinese Acad Sci, Inst Oceanol, Key Lab Ocean Observat & Forecasting, Key Lab Ocean Circulat & Waves, Qingdao 266000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Guo, Yuan,Nunziata, Ferdinando,Buono, Andrea,et al. Dual-Polarimetric Sentinel-1 SAR Backscattering Features From Green Macroalgae Floating in the Coastal Ocean[J]. IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,2025,63:15. |
| APA | Guo, Yuan,Nunziata, Ferdinando,Buono, Andrea,Migliaccio, Maurizio,&Li, Xiaofeng.(2025).Dual-Polarimetric Sentinel-1 SAR Backscattering Features From Green Macroalgae Floating in the Coastal Ocean.IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING,63,15. |
| MLA | Guo, Yuan,et al."Dual-Polarimetric Sentinel-1 SAR Backscattering Features From Green Macroalgae Floating in the Coastal Ocean".IEEE TRANSACTIONS ON GEOSCIENCE AND REMOTE SENSING 63(2025):15. |
入库方式： OAI收割
来源：海洋研究所
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