This paper presents the results of an investigation of low-frequency variability in the Indian Ocean (IO) primarily using satellite altimeter sea surface height (SSH) observations and expendable bathy-thermograph (XBT) data. We found that in most regions of the IO the low-frequency part of the SSH spectra (corresponding to signals with periods of a few months or longer) is concentrated in four frequency bands separated by substantial spectral gaps. These bands correspond to periods of approximately 6 months, 12 months, 18-20 months and more than 30 months (hereafter referred to as the 30-month band). For both 18-20-month and 30- month bands the spectral density shows a dipolelike pattern with some degree of similarity; however, analysis of the spatial-temporal evolution of these signals suggests that the 18-20-month signal is an internal mode of the IO, while that of the 30- month component propagates from the Pacific Ocean, in particular with a much stronger signal during the period from 1998 to 2003. © Springer-Verlag Berlin Heidelberg 2007.
CITATION STYLE
Sakova, I. V., Meyers, G., & Coleman, R. (2007). On the low-frequency variability in the Indian Ocean. In International Association of Geodesy Symposia (Vol. 130, pp. 47–50). https://doi.org/10.1007/978-3-540-49350-1_7
Mendeley helps you to discover research relevant for your work.