Abstract
Large-scale sea-level oscillations were investigated at 10 coastal stations in the Laptev Sea. Daily mean sea-level heights for the years 1962–1984 were used. Spectral analysis of time series reveals significant energetic peaks at 1 year, 28–30, 7–8, 5.2–5.3, 4.3, 3.0–3.3, 2.4–2.5 and 2.1–2.2 days. Long-period components were extracted using harmonic analysis on the basis of the least square method. The observed monthly tide exceeds the equilibrium tide by a factor of 1.45. Variance analysis of non-tidal (residual) time series shows that the maximum intensity of the sea-level oscillations is observed for periods of less than 1 year (from 66 to 81% of the total variance). From 13 to 24% of the total variance is accounted for by the long-period tides and 5–18% of the variance is due to interannual variability. An analysis of the two-dimensional distribution of temporal variations of amplitudes at the synoptic scale reveals their non-steady-state character for this range. Cross-spectral analysis of the non-tidal level oscillations indicates high coherence (0.68–0.98) between sea-level variations at the synoptic scale at different stations. The spatial distribution of phases shows that these sea level variations are mainly progressive waves in the range of less than 60 days. Calculated velocities of these waves are close to phase velocities of shelf waves and have a magnitude of 1.3–5.2 m/s for periods from 4 to 46 days.
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Voinov, G.N., Zakharchuk, E.A. (1999). Large-Scale Variations of Sea Level in the Laptev Sea. In: Kassens, H., et al. Land-Ocean Systems in the Siberian Arctic. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-60134-7_3
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DOI: https://doi.org/10.1007/978-3-642-60134-7_3
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