Suresh I., Vialard Jérôme, Lengaigne Matthieu, Han W., McCreary J., Durand Fabien, Muraleedharan P. M. (2013). Origins of wind-driven intraseasonal sea level variations in the North Indian Ocean coastal waveguide. Geophysical Research Letters, 40 (21), p. 5740-5744. ISSN 0094-8276.
Titre du document
Origins of wind-driven intraseasonal sea level variations in the North Indian Ocean coastal waveguide
Suresh I., Vialard Jérôme, Lengaigne Matthieu, Han W., McCreary J., Durand Fabien, Muraleedharan P. M.
Source
Geophysical Research Letters, 2013,
40 (21), p. 5740-5744 ISSN 0094-8276
In this paper, we show that a linear, continuously stratified ocean model reproduces observed wind-driven intraseasonal sea level variability in the coastal waveguide of the Northern Indian Ocean (NIO). Sensitivity experiments with intraseasonal wind forcing selectively applied in the equatorial region, Bay of Bengal, and Arabian Sea show that a large part of the basin-scale sea level variations are driven by zonal wind fluctuations along the equator. Within the NIO coastal waveguide, the contribution of remote equatorial forcing decreases from similar to 80-90% in the Andaman Sea to similar to 50% northeast of Sri Lanka and then increases to similar to 60-70% along the west coast of India. During the southwest monsoon, intraseasonal wind variations become stronger over the NIO, resulting in a larger contribution of local wind forcing to sea level variability along the west (up to 60%) and east (up to 40%) coasts of India.
Plan de classement
Sciences fondamentales / Techniques d'analyse et de recherche [020]
;
Limnologie physique / Océanographie physique [032]
