Ocean Internal Waves Observed in the Lombok Strait

Susanto, R. Dwi; Mitnik, L.M.; Zheng, Quanan

doi:10.5670/oceanog.2005.08

Cited by 109 publications

(94 citation statements)

References 11 publications

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“…In the previous study Mitnik and Alpers, 2000;Ningsih et al, 2004;Susanto et al, 2005), it was suggested that the internal solitary waves in the Lombok Strait were generated in stratified water by tidal currents in the sill area between the Nusa Penida and Lombok Islands. In addition, Susanto et al (2005) concluded that background current (i.e., the ITF), tidal conditions, stratifications control the internal-wave generation and propagation in the Strait of Lombok.…”

Section: Observation Of Internal Solitary Wavesmentioning

confidence: 99%

“…In addition, Susanto et al (2005) concluded that background current (i.e., the ITF), tidal conditions, stratifications control the internal-wave generation and propagation in the Strait of Lombok.…”

Section: Observation Of Internal Solitary Wavesmentioning

confidence: 99%

“…The images in Figure 1 show clearly sea surface manifestations of packets of internal solitary waves (circular bright/dark patterns) propagating both southward and northward. Susanto et al (2005) …”

Section: Observation Of Internal Solitary Wavesmentioning

confidence: 99%

“…November 1997, and on 15 December 1999, respectively (Susanto et al, 2005 and. The period of the SAR images were chosen to represent typical times of the west-east transitional monsoon, the east-monsoon, the east-west transitional monsoon, and the westmonsoon in order to investigate characteristics of internal waves and their variation in the Lombok Strait.…”

Section: Observation Of Internal Solitary Wavesmentioning

confidence: 99%

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Internal Waves Dynamics in the Lombok Strait Studied by a Numerical Model

Ningsih

Rachmayani

Hadi

et al. 2010

IJReSES

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A baroclinic ihrec-dimensional (3D) hydrodynamic model with ihe nonhydroslatic approximalion called Massachusetts Institute of Technology -Global Circulation Model (MlTgcm) has been applied to simulate the generation of internal tidal bores and their disintegration into internal solitary waves in the Strait of Lombok. Numerical simulations have been carried out by incorporating seasonal variations of the stratification of [he water body, which exist during the 1" transitional monsoon, the east monsoon, the 2 M transitional monsoon, and the west monsoon. Our simulation yields the results that the existence of the sill at the southern part of the Lombok Strait, strong tidal flow, and a stratified fluid, play an important role in forming some short of divergence and convergence area as an indication of the birth of internal waves, which are simulated on the both sides of thcsill. The simulated results reproduce reasonably well the basic features of internal waves in the Strait of Lombok as captured by the Synthetic Aperture Radar (SAR) from the European Remote Sensing (ERS) satellites ERS I and ERS 2, such as a north-south asymmetry, propagation speeds, average amplitudes and wavelengths, and soliton packets. Similar to observations made by National Oceanic and Atmospheric Administration (NOAA) satellites, the simulation results also showed the intrusion of warm water from the Pacific Ocean into the Indian Ocean and the existence of well-developed thermal plume at south of the sill. Seasonal variations of interface depth of thermocline and the density difference between the stratified layers influence magnitudes of the amplitudes and wavelengths of the internal waves and solitons, and the distance of thermal plume in the Lombok Strait. It is found that during the monsoon transition periods and the west monson, ihe amplitudes of internal waves and solitons at the southern part of the strait is apparently larger than those at the northern one, whereas during the east monsoon, the wave amplitudes is larger north of the sill than south of it. Meanwhile, the propagation speeds of northward propagating internal solitary waves (0.71 -2.67 m/s) arc stronger than southward propagating ones(0.21-1.53 m/s) throughout the monsoon periods.

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Section: Observation Of Internal Solitary Wavesmentioning

confidence: 99%

Section: Observation Of Internal Solitary Wavesmentioning

confidence: 99%

Section: Observation Of Internal Solitary Wavesmentioning

confidence: 99%

Section: Observation Of Internal Solitary Wavesmentioning

confidence: 99%

See 2 more Smart Citations

Internal Waves Dynamics in the Lombok Strait Studied by a Numerical Model

Ningsih

Rachmayani

Hadi

et al. 2010

IJReSES

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“…Disturbances created Science Publications AJES within the ocean give rise to these waves, which represent a significant mechanism for the transport of momentum and energy within the ocean. Disturbances are often caused by tidal flow passing over shallow underwater obstacles such as a sill or a shallow ridge (Osborne and Burch, 1980;Susanto et al, 2005).…”

Section: Introductionmentioning

confidence: 99%

General Circulation in the Malacca Strait and Andaman Sea: A Numerical Model Study

Rizal

Damm

Wahid

et al. 2012

American Journal of Environmental Sciences

131

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In the Andaman Sea and Malacca Strait, as in other parts of the Indian Ocean, the seasonal change of the wind plays a most important role: the south-west (hereafter SW) is monsoon active from June through September and the north-east (hereafter NE) monsoon is active from December through February. During the NE monsoon the winds are directed from the north and northeast to the south-west, and during the SW monsoon from the south-west to the north-east. Strong winds between June and September lead to maximum rainfall over most parts of the Indian subcontinent. These areas are also greatly influenced by the tides. The circulation in the Andaman Sea and the Malacca Strait is simulated with a three-dimensional baroclinic primitive equation model. In order to run the model, the HAMSOM model is used. The model is forced by tides at the open boundaries as well as by wind and heat flux. We use also the NCEP/NCAR data. The M2-tide amplitudes are bigger in the shallow areas in the northwest part coast of Andaman Sea and in the Malacca Strait. The phases of M2 tide shows that the M2 tidal wave come from Indian Ocean and bifurcates to the Andaman Sea and Malacca Strait. The current ellipses of M2-tide are also stronger in the shallow areas both in the Andaman Sea and Malacca Strait. There are two types of tidal distribution in the Andaman Sea and Malacca Strait. In the Indian Ocean part and in the middle of the Malacca Strait, the type is mixed tide prevailing semi diurnal, while in the Andaman Sea and the southern part of the Malacca Strait the type is semi diurnal tide. Generally, the general circulation caused by tides, heat flux and wind both for NE and SW monsoon shows the same pattern. These general circulation patterns, vertical structure of temperature and salinity in the Malacca Strait are compared with the observations carried out by other researchers. Based on those comparisons, the results of the model are reasonable. It means, the HAMSOM model can be used for the simulation of the Andaman Sea and Malacca Strait.

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Tidal mixing signatures in the Indonesian seas from high‐resolution sea surface temperature data

Ray

Susanto

2016

Geophysical Research Letters

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The presence of significant tidal mixing in the Indonesian seas is well established from both observations and numerical modeling. One indicator is a clear spring‐neap cycle in satellite sea surface temperature (SST) measurements, as first shown by Ffield and Gordon. Their early results are here updated with SST data of considerably higher spatial and temporal resolution. The largest fortnightly signals are found to be localized to relatively small straits, channels, and sills, while the deep basin of the Banda Sea displays little significant signal. A broader region of somewhat enhanced signal surrounds the Seram Sea. The high resolution of the modern SST data is especially critical for mapping the complex fortnightly signals that arise in, and especially south of, the major straits of the Lesser Sunda Island chain.

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Ocean Internal Waves Observed in the Lombok Strait

Cited by 109 publications

References 11 publications

Internal Waves Dynamics in the Lombok Strait Studied by a Numerical Model

Internal Waves Dynamics in the Lombok Strait Studied by a Numerical Model

General Circulation in the Malacca Strait and Andaman Sea: A Numerical Model Study

Tidal mixing signatures in the Indonesian seas from high‐resolution sea surface temperature data

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