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Buffering effect and its related ocean dynamics in the Indonesian throughflow region


Qu, T and Du, Y and McCreary, P and Meyers, GA and Yamagata, T, Buffering effect and its related ocean dynamics in the Indonesian throughflow region, Journal of Physical Oceanography, 38, (2) pp. 503-516. ISSN 0022-3670 (2008) [Refereed Article]

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Copyright Statement

© 2008 American Meteorological Society

DOI: doi:10.1175/2007JPO3759.1


Analysis of results from a high-resolution general circulation model confirms the existence of a "buffering" effect in the Indo-Australian Basin in which the upper ocean receives an excess of water from February to June and releases it during the rest of the year. A similar, but significantly weaker, phenomenon exists in the Indonesian seas. The buffering mostly results from geostrophic convergence, with the directly wind-driven Ekman divergence playing a role only within the Indonesian seas. Upward phase propagation, or equivalently, downward energy propagation, is revealed, indicating the prominent influence of remotely forced Kelvin waves originating in the equatorial Indian Ocean. The model demonstrates that these Kelvin waves penetrate as far eastward as the Ombai Strait along the southern Indonesian coastal waveguide, and that they have a notable influence on the upper-ocean convergence/divergence in the Indo-Australian Basin. Some of the semiannual signal turns northward through the Lombok and Ombai Straits to impact the circulation and thermal structure within the Indonesian seas.

Item Details

Item Type:Refereed Article
Keywords:Indonesian Throughflow, buffering effect, Indo-Australian Basin, geostrophic convergence, Kelvin waves, Ekman
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:Meyers, GA (Professor Gary Meyers)
ID Code:62100
Year Published:2008
Web of Science® Times Cited:11
Deposited By:Centre for Marine Science
Deposited On:2010-03-10
Last Modified:2014-02-12

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