Dynamics of intraseasonal sea level variations observed at Gan Island and Sibolga

Iskandar, Iskhaq (2009) Dynamics of intraseasonal sea level variations observed at Gan Island and Sibolga. Journal Matematika dan Sains, 14 (3). pp. 69-75. ISSN 0854-5154

[img]
Preview
PDF - Published Version
Download (436Kb) | Preview

    Abstract

    Dynamics of intraseasonal sea level variability in the central and eastern equatorial Indian Ocean is examined using 66 months (1 January 1993 to 30 June 1998) of the observed sea level at Gan Island (0°41’S, 73°E) and Sibolga (1°45’N, 98°46’E). The analysis shows that the intraseasonal signals of 20-100-day at those two tidal stations are coherent and exhibit eastward energy propagation. These intraseasonal variations are associated with the propagation of equatorial Kelvin waves generated by the zonal winds along the equator. The lag-correlation analysis reveals that their phase speed is closed to the theoretical phase speed of the first and second baroclinic modes of the Kelvin waves.

    Item Type: Article
    Uncontrolled Keywords: Gan Island, Indian Ocean, Intraseasonal variation, Kelvin waves, Sea level, Sibolga.
    Subjects: Q Science > QC Physics
    Divisions: Faculty of Mathematics and Natural Sciences > Department of Physics
    Depositing User: Dr. Iskhaq Iskandar
    Date Deposited: 02 Feb 2015 08:48
    Last Modified: 02 Feb 2015 08:48
    URI: http://eprints.unsri.ac.id/id/eprint/5103

    Actions (login required)

    View Item