| 摘要: |
| 海水表面温度是研究气候变化的重要参数，具有巨大的研究意义.在近海海域进行研究时对分辨率具有较高的要求.在珠江口区域，利用LANDSAT 8影像热红外波段，结合美国中等分辨率成像光谱仪(MODIS)的近红外水汽二级产品MOD05，运用Jiménez-Muoz提出的单通道法，优化了部分参数，建立海表温度的反演流程.为了确定可行性，将与LANDSAT 8影像同一日期的MODIS海表温度产品MOD28作为实验的对照组，利用实测数据对比验证2组数据的质量.结果表明，反演结果时空分布规律与MOD28趋近一致，均呈现为夏季西高东低而冬季西低东高，全年温度变化接近准正弦曲线，并且反演结果精度更优，具有良好的应用前景. |
| 关键词: 物理海洋学 海表温度 单通道算法 LANDSAT 8卫星 MODIS MOD05 MOD28 |
| DOI：10.3969/J.ISSN.2095-4972.2018.03.006 |
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| 基金项目:深圳市未来产业专项资金资助项目(JSGG20150512145714247)；深圳市知识创新计划资助项目(JCYJ20150831194835299) |
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| SST retrieving of the Pearl River Estuary by thermal infrared images from landsat 8 satellite |
| DUAN Guang-tuo,GHEN Jin-song,ZHANG Yan-nan,WANG Jiu-juan,HAN Yu |
| (Center for Geospatial Information, Shenzhen Institution of Advanced Technology, CAS, Shenzhen 518055, China;Shenzhen Engineering Laboratory for Big Data Analysis and Application of Ocean Environment, Shenzhen 518055,China) |
| Abstract: |
| Sea surface temperature (SST) is an important parameter for studying climate change of important significance. High resolution is required in offshore research. Using thermal infrared band of LANDSAT 8 images and near infrared water vapor product of American Moderate Resolution Imaging Spectroradiometer (MODIS), the SST retrieving process was established on the Pearl River Estuary by Jimenez-Munoz single-channel algorithm with some optimized parameters to the research feasibility. The MODIS SST product MOD28, which is the same date as the LANDSAT 8 image, is used as a control group to verify the quality of the two sets of data using in situ data. The results show that the spatial and temporal distribution of the inversion results is consistent with MOD28. It shows that SST is high in the west and low in the east in summer while it is low in the west and high in the east in winter. The annual temperature changes close to the quasi sinusoidal curve. Moreover, the inversion result is more accurate and has a good application prospect. |
| Key words: physical oceanography sea surface temperature(SST) single-channel algorithm LANDSAT 8 satellite MODIS MOD05 MOD28 |
