International Conference on Manufacturing Technology, Materials and Chemical Engineering | |
Study on Sea Ice Extraction and Area Correction Model Based on MODIS and GF Data | |
机械制造;材料科学;化学工业 | |
Wu, Jinwen^1 ; Sun, Longyu^1 ; Zhang, Yushu^1 ; Ji, Ruipeng^1 ; Yu, Wenying^1 ; Feng, Rui^1 ; Guo, Liang^2,3 | |
Institute of Atmospheric Environment(IAE), CMA, Shengyang | |
110166, China^1 | |
Meteorological Bureau of Shenyang, Shengyang | |
110168, China^2 | |
Meteorological Bureau of Pingshun, Pingshun | |
047400, China^3 | |
关键词: Correlation coefficient; Difference values; Extraction method; High spatial resolution; High-time resolution; Interannual variation; Spectral observations; Spectral reflectances; | |
Others : https://iopscience.iop.org/article/10.1088/1757-899X/392/6/062105/pdf DOI : 10.1088/1757-899X/392/6/062105 |
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学科分类:材料科学(综合) | |
来源: IOP | |
【 摘 要 】
To gain correct sea ice data, high time resolution (MODIS) and high spatial resolution (GF-2) materials are combined to achieve wide-range high precision monitoring of sea ice area in Liaodong Bay. This article takes GF-2 sea ice area as the baseline, intercepts corresponding MODIS sea ice monitoring scope, establishes a sea ice area correction model, and conducts long time series' analysis of sea ice area change. Here's the result: spectral observation result shows that comparing with CH2 channel, spectral reflectance of the snow-covering sea ice, ice-water mixture, seawater and sea ice in CH1 are with a greater difference value and easier to distinguish. Comparing with the accuracy of 3 extraction methods of MODIS sea ice, the optimal method is CH1 single channel extraction. This paper takes the sea ice area extracted by GF-2 satellite as the benchmark data, then establishes a MODIS sea ice area correction model. The model's correlation coefficient is 0.96. The monitoring error after correction is reduced from 39% to 10%. Sea ice area change in long time sequence shows that the sea ice area of Liaodong Bay is in slight downtrend. The inter-annual variation is featured with 4 years' periodical change. In every winter, sea ice area is in unimodal change, and reaches the maximum value in about early Feb.
【 预 览 】
Files | Size | Format | View |
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Study on Sea Ice Extraction and Area Correction Model Based on MODIS and GF Data | 498KB | download |