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Intraseasonal variability of sea level and circulation in the Gulf of Thailand: the role of the Madden–Julian Oscillation
Citation
Oliver, ECJ, Intraseasonal variability of sea level and circulation in the Gulf of Thailand: the role of the Madden-Julian Oscillation, Climate Dynamics pp. 1-16. ISSN 0930-7575 (2012) [Refereed Article]
Copyright Statement
Copyright 2012 Springer.
DOI: doi:10.1007/s00382-012-1595-6
Abstract
Intraseasonal variability of the tropical Indo-
Pacific ocean is strongly related to the Madden–Julian
Oscillation (MJO). Shallow seas in this region, such as the
Gulf of Thailand, act as amplifiers of the direct ocean
response to surface wind forcing by efficient setup of sea
level. Intraseasonal ocean variability in the Gulf of Thailand
region is examined using statistical analysis of local
tide gauge observations and surface winds. The tide gauges
detect variability on intraseasonal time scales that is related
to the MJO through its effect on local wind. The relationship
between the MJO and the surface wind is strongly
seasonal, being most vigorous during the monsoon, and
direction-dependent. The observations are then supplemented
with simulations of sea level and circulation from a
fully nonlinear barotropic numerical ocean model
(Princeton Ocean Model). The numerical model reproduces
well the intraseasonal sea level variability in the Gulf of
Thailand and its seasonal modulations. The model is then
used to map the wind-driven response of sea level and
circulation in the entire Gulf of Thailand. Finally, the
predictability of the setup and setdown signal is discussed
by relating it to the, potentially predictable, MJO index.
Item Details
Item Type: | Refereed Article |
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Keywords: | Madden-Julian Oscillation, predictability, wind-driven circulation, shelf circulation |
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: | 82763 |
Year Published: | 2012 |
Web of Science® Times Cited: | 5 |
Deposited By: | IMAS Research and Education Centre |
Deposited On: | 2013-02-17 |
Last Modified: | 2018-03-28 |
Downloads: | 0 |
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