Mean sea surface heights of the South and East China Seas from ocean circulation model and geodetic leveling
Mean sea surface heights of the South and East China Seas from ocean circulation model and geodetic leveling
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DOI：
10.1360/02tb9078
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发表时间：
2002-02
影响因子：
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通讯作者：
G. Fang;Zexun Wei;Yue Fang;Kai Wang;B. Choi
中科院分区：
文献类型：
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作者：
G. Fang;Zexun Wei;Yue Fang;Kai Wang;B. Choi
利用海洋环流模式和海面气压资料，计算了华南、华东、黄海和渤海的平均海面高度（海面地形）。环流模式覆盖全球海洋，细网格（1/6°）覆盖东亚边缘海，粗网格（3°）覆盖全球海洋的其余部分。结果表明，中国1985年国家高程基准高出世界各大洋平均海面24.7cm。中国近海平均海面呈现南高北低的趋势。模型计算结果与28个验潮站的水准测量结果比较，标准差为4.8cm，拟合系数为95.3%。通过线性回归校正后，标准偏差降低至4.5 cm。这表明，模型结果的精度是足够的实际应用。根据模式结果，给出了研究区平均海面高度的1/6度分辨率。该结果还将岛屿的平均海平面与大陆海岸的平均海平面联系起来，并给出了台湾岛、东沙群岛、西沙群岛和南沙群岛的验潮站相对于中国1985年国家高程基准的平均海面高度。
The mean sea surface heights (sea surface topography) of the South China, East China, Yellow and Bohai Seas are derived from an ocean general circulation model and surface air pressure. The circulation model covers the global oceans, with fine grid (1/6°) covering the East Asian marginal seas and coarse grid (3°) covering the rest part of the global oceans. The result shows that the China 1985 National Altitude Datum is 24.7 cm above the mean sea surface height of the world oceans. The mean sea surface in the coastal ocean adjacent to China is higher in the south than in the north. Intercomparison of the model results with the geodetic leveling measurements at 28 coastal tidal stations shows a standard deviation of 4.8 cm and a fitting coefficient of 95.3%. After correction through linear regression, the standard deviation is reduced to 4.5 cm. This indicates that the accuracy of model results is sufficient for practical application. Based on the model results, the mean sea surface heights for the study area with a resolution of 1/6 degree are given. This result also links the mean sea levels at islands with those on the mainland coast and gives the mean sea surface heights at tidal stations in the Taiwan Island, the Dongsha Islands, the Xisha Islands and the Nansha Islands relative to the China 1985 National Altitude Datum.