陆架波的数值研究及分析
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摘要: 本文应用二维正压模式模拟冬季黄,东海的陆架陷波与环流,模式考虑了方程中所有项,数值模式采用显式的二次守恒格式,其优点在于能够抑制非线性不稳定性. 计算结果表明,黄、东海存在两个自由陆架波,在黄海海域呈气旋式传播,一个沿中国大陆向低纬传播,具有较大的振幅和波长,波速为50—70千米/小时,另一个沿朝鲜沿岸向北传播,波速为30—60千米/小时.这些波动发生在大风过境之后,或大风的松弛过程中,其消衰时间约3天.计算还发现,沿冲绳海崖有一向南传播的自由双开尔文波.
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