Open Access Repository

Interannual variability in the Indian Ocean using altimeter and IX1-expendable bathy-thermograph (XBT) data: Does the 18-month signal exist?

Downloads

Downloads per month over past year

Sakova, IV, Meyers, G and Coleman, R 2006 , 'Interannual variability in the Indian Ocean using altimeter and IX1-expendable bathy-thermograph (XBT) data: Does the 18-month signal exist?' , Geophysical Research Letters, vol. 33, no. L20603 , pp. 1-5 , doi: 10.1029/2006GL027117.

[img] PDF
Sakova_etal_GRL...pdf | Request a copy
Full text restricted
Available under University of Tasmania Standard License.

Abstract

The dominant frequency bands in altimeter sea surface
height (SSH) variability over the whole Indian Ocean and
in temperature profiles near the Sumatra-Java coast are
identified and analysed using spectral analysis techniques.
We find that in most regions of the Indian Ocean, the lowfrequency
part of the SSH spectra (corresponding to signals
with periods from six months to six years) is concentrated
in five frequency bands separated by substantial spectral
gaps: semi-annual, annual, 18–20 months, 3 years, and
4–6 years. The existence of semi-annual, annual, 2–3-year,
and 4–6-year periodical signals is well known; however,
the 18–20-month signal has not previously been described.
Further investigation of temporal and spatial characteristics
of this later signal point to its relationship with the Indian
Ocean dipole events: the signal is particularly strong
between 1994 and 2000; it develops near the Sumatra
coast and propagates to the Bay of Bengal and into the
Indonesian Throughflow. Citation: Sakova, I. V., G. Meyers,
and R. Coleman (2006), Interannual variability in the Indian
Ocean using altimeter and IX1-expendable bathy-thermograph
(XBT) data: Does the 18-month signal exist?,

Item Type: Article
Authors/Creators:Sakova, IV and Meyers, G and Coleman, R
Journal or Publication Title: Geophysical Research Letters
ISSN: 0094-8276
DOI / ID Number: 10.1029/2006GL027117
Additional Information:

AGU. Copyright 2006 American Geophysical Union

Item Statistics: View statistics for this item

Actions (login required)

Item Control Page Item Control Page
TOP