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首页> 外文期刊>Pure and Applied Geophysics >Influence of Pacific on Southern Indian Ocean Rossby Waves
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Influence of Pacific on Southern Indian Ocean Rossby Waves

机译:太平洋对印度洋南部罗斯比海浪的影响

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摘要

The sea-surface height anomalies derived from Simple Ocean Data Assimilation (SODA) during 1958–2001, Topex/Poseidon satellite during 1993–2001 and the SODA heat content anomalies (125 m depth) during 1958–2001 are filtered into annual and biennial Rossby wave components using a two-dimensional Finite Impulse Response filter. The filtered Rossby wave components (both annual and biennial) in the southern Pacific and Indian Oceans have considerable strength and variability. The propagation of annual and biennial Rossby waves in the Indonesian through-flow region [12.5°S–7.5°S] of the Indian Ocean is in phase with the southern Pacific Ocean waves. So it is speculated that the Pacific Ocean influences the Indian Ocean, especially through the region 17.5°S to 7.5°S and thus the southern Pacific Rossby waves could be an unexplored contributor to the Indian Ocean Rossby waves. We also carried out Fast Fourier Transform (FFT) and wavelet analysis on the tide gauge sea-level data along the Australian coast to support our claim. Filtered annual and biennial components of SODA heat content anomalies (125 m depth) also support these findings.
机译:由1958-2001年间的简单海洋资料同化(SODA),1993-2001年间的Topex / Poseidon卫星和1958-2001年间的SODA热含量异常(125 m深度)得出的海面高度异常被过滤为年度和两年期Rossby使用二维有限冲激响应滤波器来分析波分量。在南太平洋和印度洋,经过滤波的罗斯比波分量(每年和每两年一次)具有相当大的强度和可变性。在印度洋的印度尼西亚通流区[12.5°S–7.5°S]中,一年和两年一次的Rossby波的传播与南部太平洋海浪的相位相同。因此推测太平洋对印度洋产生了影响,特别是在17.5°S到7.5°S区域内,因此,太平洋的Rossby波可能是印度洋Rossby波的未开发贡献。我们还对澳大利亚沿海的潮汐仪海平面数据进行了快速傅立叶变换(FFT)和小波分析,以支持我们的主张。 SODA热含量异常(125 m深度)的过滤后的年度和两年期成分也支持这些发现。

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