Analyzing the physics of non-tidal barotropic sea level anomaly events using multi-scale numerical modelling in Singapore regional waters

Kurniawan, Alamsyah; Tay, Serene Hui Xin; Ooi, Seng Keat; Babovic, Vladan; Gerritsen, H.

doi:10.1016/j.jher.2014.10.005

Cited by 13 publications

(9 citation statements)

References 28 publications

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“…Notwithstanding its maritime history, Malacca Strait is also an area with rich resources including productive coastal ecosystems, mangrove forests, coral reefs, seagrass beds, and fisheries (Thia-Eng et al 2000). Located between the Andaman Sea and the South China Sea, Malacca Strait is hydrodynamically complex due to the confluence of tides from these two large water bodies with seasonal monsoons that have effect on the net flow transport through the strait (Rizal et al 2010;Van Maren and Gerritsen 2012;Kurniawan et al 2014Kurniawan et al , 2015Tay et al 2016). In this paper, the flow condition is defined by a combination of tidal and non-tidal.…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation of tide and sea level anomalies propagation in Malacca Strait

Kurniawan¹,

Tay²,

Ooi³

2021

Terr. Atmos. Ocean. Sci.

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The importance of the Malacca Strait to trade is important but its importance in terms of ocean connectivity is often ignored. This paper is a study of the propagation of tide and sea level anomalies (SLA) (i.e., non-tidal component) in the Malacca Strait using a well calibrated numerical model. Four main tidal constituents are examined at different sections of the strait. Tidal amplitude in terms of water level and volumetric flux of these four constituents are derived using harmonic analysis. It is shown that the tidal flux propagation pattern behaves differently from the tidal water level propagation pattern in the strait. Detailed analysis of the tidal amplitudes of both water level and volumetric flux makes the location of the tidal mixing zone in the strait becomes apparent. Analyzing the SLA with regards to flux and net flux volume at each cross section in the strait shows that the tidal mixing zone plays a role in obstructing the propagation of SLA from Andaman Sea and Singapore Strait.

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Section: Introductionmentioning

confidence: 99%

Numerical investigation of tide and sea level anomalies propagation in Malacca Strait

Kurniawan¹,

Tay²,

Ooi³

2021

Terr. Atmos. Ocean. Sci.

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“…This is because the hydrodynamics in southern Malacca Strait is highly complex. (Kurniawan et al, 2011, 2015, Tay et al, 2016 have pointed out that this area is a major tidal mixing zone between Indian Ocean and South China Sea. (Tay et al, 2016) have also shown that the local non-tidal hydrodynamics are heavily influenced by both Indian Ocean and South China Sea and their degree of influence is seasonally varying.…”

Section: Resultsmentioning

confidence: 99%

“…Details of tidal calibration and representation of model is described by (Tay et al, 2013). 6-hourly 0.75 degree horizontal resolution surface wind and pressure fields obtained from ECMWF ERA-Interim database (www.ecmwf.int) are applied to the model to generate non-tidal barotropic flow in the model domain (Kurniawan et al, 2015;Tay et al, 2016).…”

Section: Physics-based Numerical Modelmentioning

confidence: 99%

“…As mentioned earlier, the SLA representation in Malacca Strait is significantly improved by superimposing SLA (known as 'tilt') on the Andaman Sea open boundary in addition to tide and meteorological forcing in the model (Tay et al, 2013;Kurniawan et al, 2015). Tilt is applied on five boundary support points i.e.…”

Section: Physics-based Numerical Modelmentioning

confidence: 99%

“…Geographically located between Andaman Sea and South China Sea, water levels in Malacca Strait are indirectly driven by tide and hydrodynamic components from the two oceans: Indian Ocean and Pacific Ocean (Figure 1). Numerical models such as (Kurniawan et al, 2011, 2015, Tay et al, 2013, 2016 have represented tidal and non-tidal flows well in the strait. As the demand of real-time forecasting is getting higher, data assimilation techniques have been attempted in earlier studies to improve water level forecast from numerical model (Babovic and Keijzer, 2000;Sannasiraj et al, 2004;Babovic, 2009;Wang and Babovic, 2014;Wang, Babovic and Li, 2017).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Improving Water Level Forecast of an Oceanographic Model in Malacca Strait Based on Data-Driven Open Boundary Correction

Wang¹,

Tay²,

Babovic³

EPiC Series in Engineering

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Numerical model is an indispensable tool for understanding oceanographic phenomena and resolving associated physical processes. However, model error cannot be avoided due to limitations such as underlying assumption, insufficient information of bathymetry or boundary condition and so on. Data assimilation technique thus becomes an effective and essential tool to improve prediction accuracy. Updating of output is an efficient way to correct the model, but it is often carried out locally at specific locations in the model domain where measurement is available. In this study, instead of correcting output of numerical model locally, we propose to combine local correction and input correction to update open boundary of numerical model. The open boundary condition is corrected through spatial interpolation algorithm based on nearby observation in the hindcast period. Then the local forecast at measured location is distributed using the same interpolation scheme to update the boundary in the forecast period. Such boundary correction not only explores the variation in the future time step from the input updating but also allows the backbone physics embedded in numerical model to resolve the hydrodynamics in the entire computational domain.

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The Influence of Climatic-Oceanographic Factors on Triggering Sea Level Variations in the Equatorial Malacca Strait, Indonesia

Wisha

Wijaya

Hisaki

2023

Springer Proceedings in Physics

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Analyzing the physics of non-tidal barotropic sea level anomaly events using multi-scale numerical modelling in Singapore regional waters

Cited by 13 publications

References 28 publications

Numerical investigation of tide and sea level anomalies propagation in Malacca Strait

Numerical investigation of tide and sea level anomalies propagation in Malacca Strait

Improving Water Level Forecast of an Oceanographic Model in Malacca Strait Based on Data-Driven Open Boundary Correction

The Influence of Climatic-Oceanographic Factors on Triggering Sea Level Variations in the Equatorial Malacca Strait, Indonesia

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