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Sea level and circulation variability of the Gulf of Carpentaria: influence of the Madden‐Julian Oscillation and the adjacent deep ocean
Citation
Oliver, ECJ and Thompson, KR, Sea level and circulation variability of the Gulf of Carpentaria: influence of the Madden‐Julian Oscillation and the adjacent deep ocean, Journal of Geophysical Research, 116, (C2) Article C02019. ISSN 0148-0227 (2011) [Refereed Article]
Copyright Statement
Copyright 2011 American Geophysical Union
Abstract
The Madden‐Julian Oscillation (MJO) is a significant contributing factor to
intraseasonal variability in both the tropical and extratropical atmosphere and ocean. Sea
level and circulation variations in the Gulf of Carpentaria (northern Australia) and the
coastal regions of the northeastern Indian Ocean and eastern Pacific have been shown to be
related to the MJO. A nonlinear barotropic numerical model, validated with local tide
gauge data, is used to study the Gulf of Carpentaria from 1979 to 2009. It is shown that
the model reproduces well the seasonal cycle of sea level as well as intraseasonal
variations and their seasonal modulations. Intraseasonal variability is shown to be driven
by surface wind stress that is closely related to the MJO. The model is next used to
remove the local wind effect from the tide gauge data, resulting in a low‐frequency
residual signal. This low‐frequency signal is interpreted in terms of larger‐scale modes
of variability of the adjacent shelf seas and the Indian and Pacific oceans through
comparison with climatological indices, correlations with regional sea level measured by
altimeters, and Hovmöller diagrams. It is shown that this signal is generated in the
Pacific and related to the El Niño–Southern Oscillation. The implications for predictability
and forecasting in the Gulf of Carpentaria on intraseasonal timescales are discussed.
Item Details
Item Type: | Refereed Article |
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Keywords: | madden-julian oscillation, sea level variability, gulf of carpentaria |
Research Division: | Earth Sciences |
Research Group: | Oceanography |
Research Field: | Physical oceanography |
Objective Division: | Environmental Policy, Climate Change and Natural Hazards |
Objective Group: | Understanding climate change |
Objective Field: | Climate variability (excl. social impacts) |
UTAS Author: | Oliver, ECJ (Dr Eric Oliver) |
ID Code: | 84683 |
Year Published: | 2011 |
Web of Science® Times Cited: | 15 |
Deposited By: | IMAS Research and Education Centre |
Deposited On: | 2013-05-27 |
Last Modified: | 2017-11-01 |
Downloads: | 0 |
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