Sea Level Variation around Australia and Its Relation to Climate Indices

Article

Agha Karimi, Armin, Deng, Xiaoli and Andersen, Ole Baltazar. 2019. "Sea Level Variation around Australia and Its Relation to Climate Indices." Marine Geodesy. 42 (5), pp. 469-489. https://doi.org/10.1080/01490419.2019.1629131
Article Title

Sea Level Variation around Australia and Its Relation to Climate Indices

ERA Journal ID1931
Article CategoryArticle
AuthorsAgha Karimi, Armin (Author), Deng, Xiaoli (Author) and Andersen, Ole Baltazar (Author)
Journal TitleMarine Geodesy
Journal Citation42 (5), pp. 469-489
Number of Pages21
Year2019
Place of PublicationUnited States
ISSN0149-0419
1521-060X
Digital Object Identifier (DOI)https://doi.org/10.1080/01490419.2019.1629131
Web Address (URL)https://www.tandfonline.com/doi/full/10.1080/01490419.2019.1629131
Abstract

This study aims at investigating the intradecadal and decadal signals of the sea level using 25 years of altimetry data around Australia. We have used the multivariable spectral analysis to extract six periodic signals at the 95% confidence level from altimetry-derived sea-level time series in the study area. They are signals with periods of 1, 1.5, 3, 4.3, 5.7 and 11.17 years, which can also be detected in the estimated power spectra from climate indices of the Interdecadal Pacific Oscillation, Multivariate ENSO Index, and Pacific Decadal Oscillation. A parametric model including the detected periodic signals is used to estimate sea-level trends. The determined trends in the area are in a good agreement with recent studies that consider effects of climate indices through a multivariate regression model. The advantage of our model is to present more descriptive explanation of the sea level signals around Australia in terms of periodicity and spatial variability.

KeywordsAustralia, climate indices, regional sea level change, satellite altimetry, sea level spectral analysis
ANZSRC Field of Research 2020401304. Photogrammetry and remote sensing
370803. Physical oceanography
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Byline AffiliationsUniversity of Newcastle
Technical University of Denmark, Denmark
Institution of OriginUniversity of Southern Queensland
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