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Tidal currents off the antarctic ice barrier, Queen Maud Land

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Abstract

Observations of tidal currents in lat. 71° 01′ S, long. 10° 55′ W indicate that a semi-diurnal tidal wave progresses towards the WSW, that is, parallel to the main direction of the barrier. ForM 2 the cotidal hour appears to be about 7h, in good agreement with the value 6.7h, that is derived from observations of the atmospheric pressure. Furthermore, the current measurements indicate that the ratio(K 1+O1)/(M2+S2) is large, perhaps as large as 2.5.

Zusammenfassung

Beobachtungen der Gezeitenströmungen in 71° 01′ S und 10° 55′ W lassen erkennen, daß eine halbtägige Gezeitenwelle gegen WSW, also parallel zur Hauptrichtung der Eisbarriere, wandert. FürM 2 scheint das Flutstundenintervall etwa 7 Stunden zu betragen und damit gut zu dem Wert von 6,7 Stunden zu stimmen, der aus Beobachtungen des Luftdrucks abgeleitet wird. Ferner lassen Strömungsmessungen erkennen, daß der Quotient(K 1+O1)/(M2+S2) mit etwa 2,5 groß ist.

Résumé

Des observations des courants de marée, faites à 71° 01′ S et 10° 55′ W, montrent qu'une vague de marée semi-diurne progresse en direction WSW, ce qui est parallèle à la direction principale de la limite de la banquise. PourM 2 l'heure cotidale paraît être de 7h environ, ce qui correspond assez bien avec la valeur de 6.7h déduite des observations de la pression atmosphérique. En outre les mesures du courant indiquent que le quotient(K 1+O1)/(M2+S2) est assez grand et comporte environ 2.5.

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References

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Sverdrup, H.U. Tidal currents off the antarctic ice barrier, Queen Maud Land. Arch. Met. Geoph. Biokl. A. 7, 385–390 (1954). https://doi.org/10.1007/BF02277931

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  • DOI: https://doi.org/10.1007/BF02277931

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